revert reka-ui update; fix DST cellMath;

* Added the ability to disable group similar time entries

* Fix E2E test for Group similar time entries

* Simplify `TimeEntryGroupedTable` by replacing ternary with early return logic

* Refactor time entry grouping settings: rename storage key, move logic into a dedicated module

* Replace fixed `waitForTimeout` calls in E2E tests with element-based waits and assertions

* Run frontend linting and formatting for changes

.env.ci

@@ -60,7 +60,7 @@ AUDITING_ENABLED=true
 TELESCOPE_ENABLED=false
 
 # Services
-GOTENBERG_URL=http://0.0.0.0:3000
+GOTENBERG_URL=http://localhost:3000
 
 # Octane
 OCTANE_SERVER=frankenphp

.env.example

@@ -77,6 +77,9 @@ TELESCOPE_ENABLED=false
 # Services
 GOTENBERG_URL=http://gotenberg:3000
 
+# Octane
+OCTANE_SERVER=frankenphp
+
 # Local setup
 NGINX_HOST_NAME=solidtime.test
 NETWORK_NAME=reverse-proxy-docker-traefik_routing

.github/workflows/npm-test-unit.yml

@@ -0,0 +1,27 @@
+name: NPM Test Unit
+
+on: [push]
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    env:
+      TZ: UTC
+
+    steps:
+      - name: "Checkout code"
+        uses: actions/checkout@v4
+
+      - name: "Use Node.js"
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20.x'
+
+      - name: "Install npm dependencies"
+        run: npm ci
+
+      - name: "Run vitest"
+        run: npm run test:unit

.npmrc

@@ -0,0 +1 @@
+min-release-age=7

README.md

@@ -1,4 +1,4 @@
-# solidtime - The modern Open-Source Time Tracker
+# solidtime - The modern Open-Source TimeTracker
 
 [![GitHub License](https://img.shields.io/github/license/solidtime-io/solidtime?style=flat-square)](https://github.com/solidtime-io/solidtime/blob/main/LICENSE.md)
 [![Codecov](https://img.shields.io/codecov/c/github/solidtime-io/solidtime?style=flat-square&logo=codecov)](https://codecov.io/gh/solidtime-io/solidtime)

app/Http/Controllers/Api/V1/TimeEntryController.php

@@ -629,9 +629,9 @@ class TimeEntryController extends Controller
         /** @var Member|null $member */
         $member = $request->has('member_id') ? Member::query()->findOrFail($request->input('member_id')) : null;
         if ($timeEntry->member->user_id === Auth::id() && ($member === null || $member->user_id === Auth::id())) {
-            $this->checkPermission($organization, 'time-entries:update:own');
+            $this->checkPermission($organization, 'time-entries:update:own', $timeEntry);
         } else {
-            $this->checkPermission($organization, 'time-entries:update:all');
+            $this->checkPermission($organization, 'time-entries:update:all', $timeEntry);
         }
 
         if ($timeEntry->end !== null && $request->has('end') && $request->input('end') === null) {

app/Service/LocalizationService.php

@@ -96,6 +96,30 @@ class LocalizationService
         }
     }
 
+    /**
+     * Format a duration for reporting contexts (PDF reports, places that display duration
+     * directly next to cost). Promotes the verbose `Hh Mm` format to the compact `HH:MM:SS`
+     * so totals stay narrow and reconcile with cost, which is always computed to the second.
+     */
+    public function formatIntervalForReporting(CarbonInterval $interval): string
+    {
+        $promoted = [
+            IntervalFormat::HoursMinutes,
+            IntervalFormat::HoursMinutesColonSeparated,
+        ];
+        if (! in_array($this->intervalFormat, $promoted, true)) {
+            return $this->formatInterval($interval);
+        }
+
+        $previous = $this->intervalFormat;
+        $this->intervalFormat = IntervalFormat::HoursMinutesSecondsColonSeparated;
+        try {
+            return $this->formatInterval($interval);
+        } finally {
+            $this->intervalFormat = $previous;
+        }
+    }
+
     public function formatCurrency(Money $money): string
     {
         $currencyService = app(CurrencyService::class);

app/Service/TimeEntryFilter.php

@@ -62,7 +62,7 @@ class TimeEntryFilter
         if ($start === null) {
             return $this;
         }
-        $this->builder->where('start', '>', $start);
+        $this->builder->where('start', '>=', $start);
 
         return $this;
     }

docker-compose.yml

@@ -107,7 +107,7 @@ services:
             - sail
             - reverse-proxy
     playwright:
-        image: mcr.microsoft.com/playwright:v1.58.1-jammy
+        image: mcr.microsoft.com/playwright:v1.59.1-jammy
         command: ['npx', 'playwright', 'test', '--ui-port=8080', '--ui-host=0.0.0.0']
         working_dir: /src
         extra_hosts:

e2e/members.spec.ts

@@ -907,7 +907,7 @@ test.describe('Employee Sidebar Navigation', () => {
 
         // Visible links
         await expect(employee.page.getByRole('link', { name: 'Dashboard' })).toBeVisible();
-        await expect(employee.page.getByRole('link', { name: 'Time' })).toBeVisible();
+        await expect(employee.page.getByRole('link', { name: 'Time', exact: true })).toBeVisible();
         await expect(employee.page.getByRole('link', { name: 'Calendar' })).toBeVisible();
         await expect(employee.page.getByRole('link', { name: 'Projects' })).toBeVisible();
         await expect(employee.page.getByRole('link', { name: 'Clients' })).toBeVisible();

e2e/profile.spec.ts

@@ -230,6 +230,37 @@ test('test that theme can be changed to dark and light', async ({ page }) => {
     await expect(page.getByText('System default:')).toBeVisible();
 });
 
+// =============================================
+// Group similar time entries
+// =============================================
+
+test('test that group similar time entries setting can be toggled', async ({ page }) => {
+    await goToProfilePage(page);
+
+    // Get the checkbox
+    const checkbox = page.getByLabel('Group similar time entries');
+
+    // Get initial value and verify it is checked (default is true)
+    const initialValue = await checkbox.isChecked();
+    await expect(checkbox).toBeChecked();
+
+    // Toggle the checkbox
+    await checkbox.click();
+
+    // Reload
+    await page.reload();
+
+    // Verify the value is toggled
+    const afterValue = await page.getByLabel('Group similar time entries').isChecked();
+    expect(afterValue).toBe(!initialValue);
+
+    // Verify localStorage persists the setting
+    const storedValue = await page.evaluate(() =>
+        localStorage.getItem('group-similar-time-entries')
+    );
+    expect(storedValue).toBe(String(!initialValue));
+});
+
 // =============================================
 // Two Factor Authentication Tests
 // =============================================

e2e/projects.spec.ts

@@ -640,7 +640,7 @@ test('test that creating a project with estimated time in human-readable format
     await page.getByLabel('Project Name').fill(newProjectName);
 
     // Fill in estimated time using human-readable format
-    const estimatedTimeInput = page.getByPlaceholder('e.g. 2h 30m or 1.5');
+    const estimatedTimeInput = page.getByLabel('Time Estimated');
     await estimatedTimeInput.fill('2h 30m');
     await estimatedTimeInput.press('Tab');
 
@@ -668,7 +668,7 @@ test('test that creating a project with estimated time using decimal notation wo
     await page.getByLabel('Project Name').fill(newProjectName);
 
     // Fill in estimated time using decimal notation (1.5 hours = 1h 30m)
-    const estimatedTimeInput = page.getByPlaceholder('e.g. 2h 30m or 1.5');
+    const estimatedTimeInput = page.getByLabel('Time Estimated');
     await estimatedTimeInput.fill('1.5');
     await estimatedTimeInput.press('Tab');
 
@@ -696,7 +696,7 @@ test('test that creating a project with estimated time using comma decimal notat
     await page.getByLabel('Project Name').fill(newProjectName);
 
     // Fill in estimated time using comma decimal notation (2,5 hours = 2h 30m)
-    const estimatedTimeInput = page.getByPlaceholder('e.g. 2h 30m or 1.5');
+    const estimatedTimeInput = page.getByLabel('Time Estimated');
     await estimatedTimeInput.fill('2,5');
     await estimatedTimeInput.press('Tab');
 
@@ -727,7 +727,7 @@ test('test that updating estimated time on existing project works', async ({ pag
     await page.getByRole('menuitem').getByText('Edit').first().click();
 
     // Fill in estimated time
-    const estimatedTimeInput = page.getByPlaceholder('e.g. 2h 30m or 1.5');
+    const estimatedTimeInput = page.getByLabel('Time Estimated');
     await estimatedTimeInput.fill('4h 15m');
     await estimatedTimeInput.press('Tab');
 
@@ -748,7 +748,7 @@ test('test that estimated time input displays formatted value after blur', async
     await goToProjectsOverview(page);
     await page.getByRole('button', { name: 'Create Project' }).click();
 
-    const estimatedTimeInput = page.getByPlaceholder('e.g. 2h 30m or 1.5');
+    const estimatedTimeInput = page.getByLabel('Time Estimated');
 
     // Enter time in various formats and check the displayed value
     await estimatedTimeInput.fill('90');

e2e/reporting-detailed.spec.ts

@@ -32,7 +32,7 @@ test('test that detailed view shows time entries correctly', async ({ page, ctx
 
     // Verify the time entry is shown with all details
     await expect(page.getByText(projectName, { exact: true }).first()).toBeVisible();
-    await expect(page.locator('input[name="Duration"]').first()).toHaveValue('1h 00min');
+    await expect(page.locator('input[name="Duration"]').first()).toHaveValue('1:00:00');
     await expect(page.getByText('Entry for ' + projectName, { exact: true }).first()).toBeVisible();
 });
 
@@ -62,8 +62,8 @@ test('test that updating duration in detailed view works correctly', async ({ pa
         ),
     ]);
 
-    // Verify the new duration is displayed
-    await expect(durationInput).toHaveValue(updatedDuration);
+    // Verify the new duration is displayed (reporting views promote to HH:MM:SS format)
+    await expect(durationInput).toHaveValue('2:30:00');
 });
 
 // ──────────────────────────────────────────────────

e2e/reporting.spec.ts

@@ -333,7 +333,7 @@ test('test that task filtering works in reporting', async ({ page, ctx }) => {
     await page.keyboard.press('Escape');
 
     // Verify the report only shows 1h (task1's duration)
-    await expect(page.getByTestId('reporting_view').getByText('1h 00min').first()).toBeVisible();
+    await expect(page.getByTestId('reporting_view').getByText('1:00:00').first()).toBeVisible();
 });
 
 test('test that task multiselect search filters the option list', async ({ page, ctx }) => {
@@ -474,7 +474,7 @@ test('test that tag filtering works in reporting', async ({ page, ctx }) => {
     await page.keyboard.press('Escape');
 
     // Verify only time entries with tag1 are shown
-    await expect(page.getByTestId('reporting_view').getByText('1h 00min').first()).toBeVisible();
+    await expect(page.getByTestId('reporting_view').getByText('1:00:00').first()).toBeVisible();
 });
 
 test('test that tag dropdown search filters the option list', async ({ page, ctx }) => {
@@ -594,7 +594,7 @@ test('test that billable status filtering works in reporting', async ({ page, ct
         waitForReportingUpdate(page),
     ]);
 
-    await expect(page.getByTestId('reporting_view').getByText('1h 00min').first()).toBeVisible();
+    await expect(page.getByTestId('reporting_view').getByText('1:00:00').first()).toBeVisible();
 });
 
 test('test that billable filter can switch between all three states', async ({ page }) => {
@@ -885,7 +885,7 @@ test.describe('Employee Reporting Restrictions', () => {
 
         // Employee's data should be visible (1h)
         await expect(
-            employee.page.getByTestId('reporting_view').getByText('1h 00min').first()
+            employee.page.getByTestId('reporting_view').getByText('1:00:00').first()
         ).toBeVisible();
     });
 

e2e/shared-reports.spec.ts

@@ -292,8 +292,8 @@ test('test that shared report respects task filter', async ({ page, ctx }) => {
     await page.goto(shareableLink);
     await expect(page.getByText('Reporting')).toBeVisible();
     await expect(page.getByText('Total')).toBeVisible();
-    await expect(page.getByText('1h 00min').first()).toBeVisible();
-    await expect(page.getByText('3h 00min')).not.toBeVisible();
+    await expect(page.getByText('1:00:00').first()).toBeVisible();
+    await expect(page.getByText('3:00:00')).not.toBeVisible();
 });
 
 test('test that shared report respects client filter', async ({ page, ctx }) => {
@@ -369,8 +369,8 @@ test('test that shared report respects tag filter', async ({ page, ctx }) => {
     await page.goto(shareableLink);
     await expect(page.getByText('Reporting')).toBeVisible();
     await expect(page.getByText('Total')).toBeVisible();
-    await expect(page.getByText('1h 00min').first()).toBeVisible();
-    await expect(page.getByText('3h 00min')).not.toBeVisible();
+    await expect(page.getByText('1:00:00').first()).toBeVisible();
+    await expect(page.getByText('3:00:00')).not.toBeVisible();
 });
 
 test('test that shared report respects member filter', async ({ page, ctx }) => {
@@ -425,7 +425,7 @@ test('test that shared report with billable filter only shows billable entries',
     ]);
 
     // Verify only 1h shows before saving
-    await expect(page.getByTestId('reporting_view').getByText('1h 00min').first()).toBeVisible();
+    await expect(page.getByTestId('reporting_view').getByText('1:00:00').first()).toBeVisible();
 
     const { shareableLink } = await saveAsSharedReport(page, reportName);
 
@@ -435,8 +435,8 @@ test('test that shared report with billable filter only shows billable entries',
     await expect(page.getByText('Total')).toBeVisible();
 
     // Shared report should only show the 1h billable entry, not the 2h non-billable
-    await expect(page.getByText('1h 00min').first()).toBeVisible();
-    await expect(page.getByText('3h 00min')).not.toBeVisible();
+    await expect(page.getByText('1:00:00').first()).toBeVisible();
+    await expect(page.getByText('3:00:00')).not.toBeVisible();
 });
 
 // ──────────────────────────────────────────────────

e2e/time.spec.ts

@@ -39,6 +39,10 @@ function getMonthFromTimestamp(timestamp: string): number {
     return new Date(timestamp).getUTCMonth() + 1;
 }
 
+async function goToProfilePage(page: Page) {
+    await page.goto(PLAYWRIGHT_BASE_URL + '/user/profile');
+}
+
 async function goToTimeOverview(page: Page) {
     await page.goto(PLAYWRIGHT_BASE_URL + '/time');
 }
@@ -67,6 +71,14 @@ async function createEmptyTimeEntry(page: Page) {
     ]);
 }
 
+async function setTimeEntriesGrouping(page: Page, enabled: boolean) {
+    await goToProfilePage(page);
+    const checkbox = page.getByLabel('Group similar time entries');
+    const isChecked = await checkbox.isChecked();
+    if (isChecked !== enabled) await checkbox.click();
+    await goToTimeOverview(page);
+}
+
 test('test that starting and stopping an empty time entry shows a new time entry in the overview', async ({
     page,
 }) => {
@@ -333,6 +345,30 @@ test.skip('test that load more works when the end of page is reached', async ({
     await expect(page.locator('body')).toHaveText(/All time entries are loaded!/);
 });
 
+test('test that Group similar time entries option is affected', async ({ page }) => {
+    // Enable grouping
+    await setTimeEntriesGrouping(page, true);
+
+    // Create 2 similar time entries
+    await createEmptyTimeEntry(page);
+    await page.waitForSelector('[data-testid="time_entry_row"]', { timeout: 1000 });
+    await createEmptyTimeEntry(page);
+
+    // Verify similar time entries are grouped
+    await expect(page.getByTestId('grouped_items_count_button').first()).toBeVisible({
+        timeout: 1000,
+    });
+
+    // Disable grouping
+    await setTimeEntriesGrouping(page, false);
+
+    // Verify similar time entries are not grouped
+    await expect(page.locator('[data-testid="time_entry_row"]')).toHaveCount(2, { timeout: 1000 });
+    await expect(page.locator('[data-testid="grouped_items_count_button"]')).toHaveCount(0, {
+        timeout: 1000,
+    });
+});
+
 // TODO: Test that updating the time entry start / end times works while it is running
 
 // TODO: Test for project update

e2e/timesheet-overlap.spec.ts

@@ -0,0 +1,437 @@
+/**
+ * E2E coverage for the timesheet overlap-prevention logic introduced
+ * in `useTimesheetCellMutations` (Phase 1+2+3 of the overlap fix).
+ *
+ * Each test:
+ *   1. Pre-creates entries via the API to set up a deterministic
+ *      day-of-work scenario,
+ *   2. Triggers ONE cell edit through the UI,
+ *   3. Reads the resulting entries back via the API and asserts on
+ *      the start/end placement.
+ *
+ * Pre-creating rows (rather than driving the "Add row" + project picker
+ * UI) keeps the tests focused on the placement logic and out of the
+ * project-dropdown's flake surface.
+ */
+
+import { PLAYWRIGHT_BASE_URL } from '../playwright/config';
+import { test } from '../playwright/fixtures';
+import { expect } from '@playwright/test';
+import type { Page, Request } from '@playwright/test';
+import {
+    createProjectViaApi,
+    createTimeEntryAtHourViaApi,
+    getTimeEntriesViaApi,
+} from './utils/api';
+
+// ──────────────────────────────────────────────────
+// Helpers
+// ──────────────────────────────────────────────────
+
+async function goToTimesheet(page: Page) {
+    await page.addInitScript(() => {
+        window.localStorage.setItem('showReleaseInfo-desktop', 'false');
+    });
+    await page.goto(PLAYWRIGHT_BASE_URL + '/timesheet');
+}
+
+function getMonday(d: Date): Date {
+    const date = new Date(d);
+    const day = date.getUTCDay();
+    const diff = date.getUTCDate() - day + (day === 0 ? -6 : 1);
+    date.setUTCDate(diff);
+    date.setUTCHours(0, 0, 0, 0);
+    return date;
+}
+
+function getCurrentWeekMonday(): Date {
+    return getMonday(new Date());
+}
+
+async function waitForTimesheetLoad(page: Page) {
+    await expect(page.getByTestId('timesheet_view')).toBeVisible();
+    await expect(page.getByTestId('timesheet_week_display')).toBeVisible();
+
+    const timezoneMismatchModal = page
+        .getByRole('dialog')
+        .filter({ hasText: 'Timezone mismatch detected' });
+    if (await timezoneMismatchModal.isVisible().catch(() => false)) {
+        await timezoneMismatchModal.getByRole('button', { name: 'Cancel' }).click();
+        await expect(timezoneMismatchModal).not.toBeVisible();
+    }
+}
+
+const HOUR = 3600;
+
+function utcHourOf(iso: string): number {
+    return new Date(iso).getUTCHours();
+}
+
+function utcMinuteOf(iso: string): number {
+    return new Date(iso).getUTCMinutes();
+}
+
+function sortByStart<T extends { start: string }>(entries: T[]): T[] {
+    return [...entries].sort((a, b) => a.start.localeCompare(b.start));
+}
+
+/**
+ * Returns the locator for the row whose project name matches the given
+ * substring. Robust against ordering changes.
+ */
+function rowByProject(page: Page, projectName: string) {
+    return page.locator('[data-testid="timesheet_row"]').filter({ hasText: projectName });
+}
+
+/**
+ * Returns the locator for the input in the (row, dayIndex) cell, where
+ * the row is identified by project name.
+ */
+function cellInputByProject(page: Page, projectName: string, dayIndex: number) {
+    return rowByProject(page, projectName)
+        .locator('[data-testid="timesheet_cell"]')
+        .nth(dayIndex)
+        .locator('input');
+}
+
+/** Asserts that no entries in the list overlap each other. */
+function expectNoOverlaps(entries: Array<{ start: string; end: string | null }>) {
+    const sorted = sortByStart(entries.filter((e) => e.end !== null));
+    for (let i = 1; i < sorted.length; i++) {
+        const prev = sorted[i - 1]!;
+        const curr = sorted[i]!;
+        expect(
+            curr.start >= prev.end!,
+            `entries overlap: ${prev.start}–${prev.end} vs ${curr.start}–${curr.end}`
+        ).toBe(true);
+    }
+}
+
+// ──────────────────────────────────────────────────
+// Phase 1: createCell — overlap avoidance when cell is empty
+// ──────────────────────────────────────────────────
+
+test('extendCell on a row that has no entries on the day yet places after another row (Scenario #4)', async ({
+    page,
+    ctx,
+}) => {
+    // Setup: project A has Monday 09:00–10:00, project B has Tuesday
+    // 09:00–10:00. The B row is therefore visible on the timesheet but
+    // has an EMPTY cell on Monday. Typing into B's Monday cell exercises
+    // the createCell path (cell empty → place a new entry).
+    const monday = getCurrentWeekMonday();
+    const tuesday = new Date(monday);
+    tuesday.setUTCDate(monday.getUTCDate() + 1);
+
+    const projectA = await createProjectViaApi(ctx, { name: 'OverlapAlpha' });
+    const projectB = await createProjectViaApi(ctx, { name: 'OverlapBravo' });
+
+    await createTimeEntryAtHourViaApi(ctx, {
+        date: monday,
+        startHour: 9,
+        durationSeconds: HOUR,
+        projectId: projectA.id,
+    });
+    await createTimeEntryAtHourViaApi(ctx, {
+        date: tuesday,
+        startHour: 9,
+        durationSeconds: HOUR,
+        projectId: projectB.id,
+    });
+
+    await Promise.all([goToTimesheet(page), waitForTimesheetLoad(page)]);
+    await expect(page.locator('[data-testid="timesheet_row"]')).toHaveCount(2);
+
+    // Type 1h into project B's Monday cell. The createCell path should
+    // place it AFTER project A's 09:00–10:00 (i.e. at 10:00 or later),
+    // not at 09:00.
+    const input = cellInputByProject(page, 'OverlapBravo', 0);
+    await input.click();
+    await input.fill('1');
+
+    await Promise.all([
+        page.waitForResponse(
+            (resp) =>
+                resp.url().includes('/time-entries') &&
+                resp.request().method() === 'POST' &&
+                resp.status() === 201
+        ),
+        input.press('Enter'),
+    ]);
+
+    const entries = await getTimeEntriesViaApi(ctx);
+    const bMondayEntry = entries.find(
+        (e) =>
+            e.project_id === projectB.id &&
+            new Date(e.start).getTime() >= monday.getTime() &&
+            new Date(e.start).getTime() < tuesday.getTime()
+    )!;
+    expect(bMondayEntry).toBeDefined();
+    // 09:00 is blocked → must be at 10:00 or later.
+    expect(utcHourOf(bMondayEntry.start)).toBeGreaterThanOrEqual(10);
+    expectNoOverlaps(entries);
+});
+
+test('createCell refuses to cross midnight when day is full (Scenario #3)', async ({
+    page,
+    ctx,
+}) => {
+    // Setup: fill Monday 01:00–23:00 (22 hours, leaving 1h before and
+    // 1h after — neither big enough for a 3h ask). Project B is on
+    // Tuesday so the B row exists with an empty Monday cell. Typing 3h
+    // into B's Monday cell should be refused.
+    //
+    // We start at 01:00 (not 00:00) because the API's time-entry
+    // filter excludes entries whose `start` equals the query's `start`
+    // bound exactly. Using 01:00 avoids that boundary condition.
+    const monday = getCurrentWeekMonday();
+    const tuesday = new Date(monday);
+    tuesday.setUTCDate(monday.getUTCDate() + 1);
+
+    const projectFull = await createProjectViaApi(ctx, { name: 'OverlapFull' });
+    const projectNew = await createProjectViaApi(ctx, { name: 'OverlapNoRoom' });
+
+    await createTimeEntryAtHourViaApi(ctx, {
+        date: monday,
+        startHour: 1,
+        durationSeconds: 22 * HOUR,
+        projectId: projectFull.id,
+    });
+    await createTimeEntryAtHourViaApi(ctx, {
+        date: tuesday,
+        startHour: 9,
+        durationSeconds: HOUR,
+        projectId: projectNew.id,
+    });
+
+    await Promise.all([goToTimesheet(page), waitForTimesheetLoad(page)]);
+    await expect(page.locator('[data-testid="timesheet_row"]')).toHaveCount(2);
+
+    const input = cellInputByProject(page, 'OverlapNoRoom', 0);
+    const seenMutationRequests: string[] = [];
+    const onRequest = (request: Request) => {
+        if (request.url().includes('/time-entries') && request.method() !== 'GET') {
+            seenMutationRequests.push(request.method());
+        }
+    };
+    page.on('request', onRequest);
+    await input.click();
+    await input.fill('3');
+    await input.press('Enter');
+
+    await expect(page.getByText("This day can't fit any more work")).toBeVisible();
+    page.off('request', onRequest);
+
+    const entries = await getTimeEntriesViaApi(ctx);
+    // The new project should still only have its Tuesday entry.
+    const newEntries = entries.filter((e) => e.project_id === projectNew.id);
+    expect(seenMutationRequests).toEqual([]);
+    expect(newEntries).toHaveLength(1);
+    expect(utcHourOf(newEntries[0]!.start)).toBe(9);
+    // The Tuesday entry's date is unchanged (still Tuesday).
+    expect(new Date(newEntries[0]!.start).getUTCDay()).toBe(2);
+});
+
+// ──────────────────────────────────────────────────
+// Phase 2: extendCell — collision detection + split
+// ──────────────────────────────────────────────────
+
+test('extendCell splits the extension when another row blocks the path (Scenario #5)', async ({
+    page,
+    ctx,
+}) => {
+    // Setup:
+    //   - project A on Monday 09:00–10:00 (1h)
+    //   - project B on Monday 10:30–11:30 (1h, blocker)
+    // Bumping A's Monday cell from 1h to 3h (+2h) should:
+    //   - extend A to 09:00–10:30 (filling the 30min gap)
+    //   - place a new A entry at 11:30–13:00 (the remaining 90min)
+    const monday = getCurrentWeekMonday();
+    const projectA = await createProjectViaApi(ctx, { name: 'OverlapExtend' });
+    const projectB = await createProjectViaApi(ctx, { name: 'OverlapBlocker' });
+
+    await createTimeEntryAtHourViaApi(ctx, {
+        date: monday,
+        startHour: 9,
+        durationSeconds: HOUR,
+        projectId: projectA.id,
+    });
+    await createTimeEntryAtHourViaApi(ctx, {
+        date: monday,
+        startHour: 10,
+        startMinute: 30,
+        durationSeconds: HOUR,
+        projectId: projectB.id,
+    });
+
+    await Promise.all([goToTimesheet(page), waitForTimesheetLoad(page)]);
+    await expect(page.locator('[data-testid="timesheet_row"]')).toHaveCount(2);
+
+    const input = cellInputByProject(page, 'OverlapExtend', 0);
+    await input.click();
+    await input.fill('3');
+    await Promise.all([
+        page.waitForResponse(
+            (resp) =>
+                resp.url().includes('/time-entries') &&
+                resp.request().method() === 'PUT' &&
+                resp.status() === 200
+        ),
+        page.waitForResponse(
+            (resp) =>
+                resp.url().includes('/time-entries') &&
+                resp.request().method() === 'POST' &&
+                resp.status() === 201
+        ),
+        input.press('Enter'),
+    ]);
+
+    const entries = await getTimeEntriesViaApi(ctx);
+    const aEntries = entries.filter((e) => e.project_id === projectA.id);
+    const bEntries = entries.filter((e) => e.project_id === projectB.id);
+
+    // The blocker is unchanged.
+    expect(bEntries).toHaveLength(1);
+    expect(utcHourOf(bEntries[0]!.start)).toBe(10);
+    expect(utcMinuteOf(bEntries[0]!.start)).toBe(30);
+
+    // Project A should now have 2 entries.
+    expect(aEntries).toHaveLength(2);
+    const sortedA = sortByStart(aEntries);
+    // Extended entry: 09:00 → 10:30
+    expect(utcHourOf(sortedA[0]!.start)).toBe(9);
+    expect(utcHourOf(sortedA[0]!.end!)).toBe(10);
+    expect(utcMinuteOf(sortedA[0]!.end!)).toBe(30);
+    // Split remainder: 11:30 → 13:00
+    expect(utcHourOf(sortedA[1]!.start)).toBe(11);
+    expect(utcMinuteOf(sortedA[1]!.start)).toBe(30);
+
+    // No overlaps anywhere on the day.
+    expectNoOverlaps(entries);
+});
+
+test('extendCell prefers latest-end (not latest-start) when nested entries exist (Scenario #6)', async ({
+    page,
+    ctx,
+}) => {
+    // Pre-existing nested overlap on the same project:
+    //   - outer: 09:00 → 12:00 (3h)
+    //   - inner: 10:00 → 11:00 (1h, contained inside outer)
+    // The cell total is 3h + 1h = 4h. Bumping to 5h (+1h) should grow
+    // the OUTER entry's end to 13:00, not the inner.
+    const monday = getCurrentWeekMonday();
+    const project = await createProjectViaApi(ctx, { name: 'OverlapNested' });
+
+    await createTimeEntryAtHourViaApi(ctx, {
+        date: monday,
+        startHour: 9,
+        durationSeconds: 3 * HOUR,
+        projectId: project.id,
+        description: 'outer',
+    });
+    await createTimeEntryAtHourViaApi(ctx, {
+        date: monday,
+        startHour: 10,
+        durationSeconds: HOUR,
+        projectId: project.id,
+        description: 'inner',
+    });
+
+    await Promise.all([goToTimesheet(page), waitForTimesheetLoad(page)]);
+    await expect(page.locator('[data-testid="timesheet_row"]')).toHaveCount(1);
+
+    const input = cellInputByProject(page, 'OverlapNested', 0);
+    await input.click();
+    await input.fill('5');
+
+    await Promise.all([
+        page.waitForResponse(
+            (resp) =>
+                resp.url().includes('/time-entries') &&
+                resp.request().method() === 'PUT' &&
+                resp.status() === 200
+        ),
+        input.press('Enter'),
+    ]);
+
+    const entries = await getTimeEntriesViaApi(ctx);
+    const outer = entries.find((e) => e.description === 'outer')!;
+    const inner = entries.find((e) => e.description === 'inner')!;
+
+    expect(utcHourOf(outer.start)).toBe(9);
+    expect(utcHourOf(outer.end!)).toBe(13); // extended from 12:00 → 13:00
+    expect(utcHourOf(inner.start)).toBe(10);
+    expect(utcHourOf(inner.end!)).toBe(11); // unchanged
+});
+
+// ──────────────────────────────────────────────────
+// Phase 1+2 spillover from previous day
+// ──────────────────────────────────────────────────
+
+test('createCell handles intra-week spillover from previous day (Scenario #2)', async ({
+    page,
+    ctx,
+}) => {
+    // Setup: an entry that starts on Monday 22:00 and ends Tuesday 03:00
+    // (5h, crosses midnight INTO Tuesday). This spillover starts inside
+    // the loaded week, so the timesheet query loads it.
+    //
+    // Then we try to place 1h on Tuesday for a different project. The
+    // expected behavior: the new entry must NOT overlap the spillover.
+    // Tuesday 09:00 is well clear of the [00:00, 03:00) spillover, so
+    // 09:00 is the correct placement.
+    const monday = getCurrentWeekMonday();
+    const tuesday = new Date(monday);
+    tuesday.setUTCDate(monday.getUTCDate() + 1);
+    const wednesday = new Date(monday);
+    wednesday.setUTCDate(monday.getUTCDate() + 2);
+
+    const projectSpill = await createProjectViaApi(ctx, { name: 'OverlapSpill' });
+    const projectNew = await createProjectViaApi(ctx, { name: 'OverlapToday' });
+
+    // Monday 22:00 → Tuesday 03:00 (5h spillover into Tuesday).
+    await createTimeEntryAtHourViaApi(ctx, {
+        date: monday,
+        startHour: 22,
+        durationSeconds: 5 * HOUR,
+        projectId: projectSpill.id,
+    });
+    // Stub Wednesday entry on the new project so its row is visible
+    // even before we type anything in Tuesday's cell.
+    await createTimeEntryAtHourViaApi(ctx, {
+        date: wednesday,
+        startHour: 9,
+        durationSeconds: HOUR,
+        projectId: projectNew.id,
+    });
+
+    await Promise.all([goToTimesheet(page), waitForTimesheetLoad(page)]);
+    await expect(page.locator('[data-testid="timesheet_row"]')).toHaveCount(2);
+
+    // Type 1h into the new project's Tuesday cell (day index 1).
+    const input = cellInputByProject(page, 'OverlapToday', 1);
+    await input.click();
+    await input.fill('1');
+
+    await Promise.all([
+        page.waitForResponse(
+            (resp) =>
+                resp.url().includes('/time-entries') &&
+                resp.request().method() === 'POST' &&
+                resp.status() === 201
+        ),
+        input.press('Enter'),
+    ]);
+
+    const entries = await getTimeEntriesViaApi(ctx);
+    const newTuesdayEntry = entries.find(
+        (e) =>
+            e.project_id === projectNew.id &&
+            new Date(e.start).getTime() >= tuesday.getTime() &&
+            new Date(e.start).getTime() < wednesday.getTime()
+    )!;
+    expect(newTuesdayEntry).toBeDefined();
+    // 09:00 is well past the spillover end (03:00) → should land at 09:00.
+    expect(utcHourOf(newTuesdayEntry.start)).toBe(9);
+    expectNoOverlaps(entries);
+});

e2e/timesheet.spec.ts

@@ -0,0 +1,641 @@
+import { PLAYWRIGHT_BASE_URL } from '../playwright/config';
+import { test } from '../playwright/fixtures';
+import { expect } from '@playwright/test';
+import type { Page } from '@playwright/test';
+import { createProjectViaApi, createTaskViaApi, createTimeEntryOnDateViaApi } from './utils/api';
+
+// ──────────────────────────────────────────────────
+// Helpers
+// ──────────────────────────────────────────────────
+
+async function goToTimesheet(page: Page) {
+    await page.addInitScript(() => {
+        window.localStorage.setItem('showReleaseInfo-desktop', 'false');
+    });
+    await page.goto(PLAYWRIGHT_BASE_URL + '/timesheet');
+}
+
+function getMonday(d: Date): Date {
+    const date = new Date(d);
+    const day = date.getUTCDay();
+    const diff = date.getUTCDate() - day + (day === 0 ? -6 : 1);
+    date.setUTCDate(diff);
+    date.setUTCHours(0, 0, 0, 0);
+    return date;
+}
+
+function getCurrentWeekMonday(): Date {
+    return getMonday(new Date());
+}
+
+function getLastWeekMonday(): Date {
+    const monday = getCurrentWeekMonday();
+    monday.setUTCDate(monday.getUTCDate() - 7);
+    return monday;
+}
+
+function getDayOfWeek(weekStart: Date, dayOffset: number): Date {
+    const date = new Date(weekStart);
+    date.setUTCDate(date.getUTCDate() + dayOffset);
+    return date;
+}
+
+async function waitForTimesheetLoad(page: Page) {
+    await page.waitForURL(/\/timesheet(?:$|\?)/);
+    await expect(page.getByTestId('timesheet_view')).toBeVisible();
+    await expect(page.getByTestId('timesheet_week_display')).toBeVisible();
+
+    const timezoneMismatchModal = page
+        .getByRole('dialog')
+        .filter({ hasText: 'Timezone mismatch detected' });
+    if (await timezoneMismatchModal.isVisible().catch(() => false)) {
+        await timezoneMismatchModal.getByRole('button', { name: 'Cancel' }).click();
+        await expect(timezoneMismatchModal).not.toBeVisible();
+    }
+}
+
+function addRowButton(page: Page) {
+    return page.getByRole('button', { name: /Add row/i }).first();
+}
+
+async function chooseRowIdentity(page: Page, optionName: string) {
+    await addRowButton(page).click();
+
+    const dialog = page.getByRole('dialog', { name: /Add row/i });
+    const dialogVisible = await dialog
+        .waitFor({ state: 'visible', timeout: 1000 })
+        .then(() => true)
+        .catch(() => false);
+
+    if (dialogVisible) {
+        await dialog.getByRole('option', { name: optionName }).click();
+        return;
+    }
+
+    if (optionName === 'No Project') return;
+
+    const row = page.locator('[data-testid="timesheet_row"]').first();
+    await row.getByText('No Project').click();
+    await page.getByText(optionName).click();
+}
+
+// ──────────────────────────────────────────────────
+// Navigation & Page Load
+// ──────────────────────────────────────────────────
+
+test('timesheet renders empty with add row + copy last week actions', async ({ page }) => {
+    await Promise.all([goToTimesheet(page), waitForTimesheetLoad(page)]);
+
+    await expect(page.locator('[data-testid="timesheet_row"]')).toHaveCount(0);
+    await expect(addRowButton(page)).toBeVisible();
+    await expect(page.getByRole('button', { name: /Copy last week/i })).toBeVisible();
+});
+
+// ──────────────────────────────────────────────────
+// Display Existing Time Entries
+// ──────────────────────────────────────────────────
+
+test('timesheet displays existing time entries grouped by project', async ({ page, ctx }) => {
+    const monday = getCurrentWeekMonday();
+    const tuesday = getDayOfWeek(monday, 1);
+    const wednesday = getDayOfWeek(monday, 2);
+
+    const projectA = await createProjectViaApi(ctx, { name: 'Project Alpha' });
+    const projectB = await createProjectViaApi(ctx, { name: 'Project Beta' });
+
+    await createTimeEntryOnDateViaApi(ctx, {
+        date: monday,
+        duration: '2h',
+        projectId: projectA.id,
+    });
+    await createTimeEntryOnDateViaApi(ctx, {
+        date: wednesday,
+        duration: '1h',
+        projectId: projectA.id,
+    });
+    await createTimeEntryOnDateViaApi(ctx, {
+        date: tuesday,
+        duration: '3h',
+        projectId: projectB.id,
+    });
+
+    await Promise.all([goToTimesheet(page), waitForTimesheetLoad(page)]);
+
+    const rows = page.locator('[data-testid="timesheet_row"]');
+    await expect(rows).toHaveCount(2);
+
+    // Check that the grand total is shown
+    await expect(page.getByTestId('timesheet_grand_total')).toBeVisible();
+});
+
+test('timesheet groups entries by project and task combination', async ({ page, ctx }) => {
+    const monday = getCurrentWeekMonday();
+
+    const project = await createProjectViaApi(ctx, { name: 'Task Project' });
+    const taskA = await createTaskViaApi(ctx, { name: 'Task A', project_id: project.id });
+    const taskB = await createTaskViaApi(ctx, { name: 'Task B', project_id: project.id });
+
+    await createTimeEntryOnDateViaApi(ctx, {
+        date: monday,
+        duration: '1h',
+        projectId: project.id,
+        taskId: taskA.id,
+    });
+    await createTimeEntryOnDateViaApi(ctx, {
+        date: monday,
+        duration: '2h',
+        projectId: project.id,
+        taskId: taskB.id,
+    });
+
+    await Promise.all([goToTimesheet(page), waitForTimesheetLoad(page)]);
+
+    const rows = page.locator('[data-testid="timesheet_row"]');
+    await expect(rows).toHaveCount(2);
+});
+
+// ──────────────────────────────────────────────────
+// Enter Duration in Cell
+// ──────────────────────────────────────────────────
+
+test('entering duration in empty cell creates a time entry', async ({ page, ctx }) => {
+    await createProjectViaApi(ctx, { name: 'Duration Test' });
+
+    await Promise.all([goToTimesheet(page), waitForTimesheetLoad(page)]);
+
+    await chooseRowIdentity(page, 'Duration Test');
+
+    const row = page.locator('[data-testid="timesheet_row"]').first();
+
+    // Click the first day cell and enter duration
+    const cells = row.locator('[data-testid="timesheet_cell"]');
+    const mondayCell = cells.first();
+    const mondayInput = mondayCell.locator('input');
+
+    await mondayInput.click();
+    await mondayInput.fill('2');
+
+    // Submit and wait for create response
+    const [response] = await Promise.all([
+        page.waitForResponse(
+            (resp) =>
+                resp.url().includes('/time-entries') &&
+                resp.request().method() === 'POST' &&
+                resp.status() === 201
+        ),
+        mondayInput.press('Enter'),
+    ]);
+
+    expect(response.status()).toBe(201);
+
+    // Verify the cell shows the duration
+    await expect(mondayInput).not.toHaveValue('');
+});
+
+// ──────────────────────────────────────────────────
+// Edit Duration (Increase)
+// ──────────────────────────────────────────────────
+
+test('increasing duration in cell extends the last time entry', async ({ page, ctx }) => {
+    const monday = getCurrentWeekMonday();
+    const project = await createProjectViaApi(ctx, { name: 'Increase Test' });
+
+    await createTimeEntryOnDateViaApi(ctx, {
+        date: monday,
+        duration: '1h',
+        projectId: project.id,
+    });
+
+    await Promise.all([goToTimesheet(page), waitForTimesheetLoad(page)]);
+
+    const row = page.locator('[data-testid="timesheet_row"]').first();
+    const cells = row.locator('[data-testid="timesheet_cell"]');
+    const mondayInput = cells.first().locator('input');
+
+    // Click and change to 3 hours
+    await mondayInput.click();
+    await mondayInput.fill('3');
+
+    const [response] = await Promise.all([
+        page.waitForResponse(
+            (resp) =>
+                resp.url().includes('/time-entries') &&
+                resp.request().method() === 'PUT' &&
+                resp.status() === 200
+        ),
+        mondayInput.press('Enter'),
+    ]);
+
+    expect(response.status()).toBe(200);
+});
+
+// ──────────────────────────────────────────────────
+// Edit Duration (Decrease)
+// ──────────────────────────────────────────────────
+
+test('decreasing duration in cell shortens the last time entry', async ({ page, ctx }) => {
+    const monday = getCurrentWeekMonday();
+    const project = await createProjectViaApi(ctx, { name: 'Decrease Test' });
+
+    await createTimeEntryOnDateViaApi(ctx, {
+        date: monday,
+        duration: '3h',
+        projectId: project.id,
+    });
+
+    await Promise.all([goToTimesheet(page), waitForTimesheetLoad(page)]);
+
+    const row = page.locator('[data-testid="timesheet_row"]').first();
+    const cells = row.locator('[data-testid="timesheet_cell"]');
+    const mondayInput = cells.first().locator('input');
+
+    await mondayInput.click();
+    await mondayInput.fill('1');
+
+    const [response] = await Promise.all([
+        page.waitForResponse(
+            (resp) =>
+                resp.url().includes('/time-entries') &&
+                resp.request().method() === 'PUT' &&
+                resp.status() === 200
+        ),
+        mondayInput.press('Enter'),
+    ]);
+
+    expect(response.status()).toBe(200);
+});
+
+// ──────────────────────────────────────────────────
+// Clear Cell
+// ──────────────────────────────────────────────────
+
+test('clearing a cell deletes all time entries for that project+day', async ({ page, ctx }) => {
+    const monday = getCurrentWeekMonday();
+    const project = await createProjectViaApi(ctx, { name: 'Clear Test' });
+
+    await createTimeEntryOnDateViaApi(ctx, {
+        date: monday,
+        duration: '2h',
+        projectId: project.id,
+    });
+
+    await Promise.all([goToTimesheet(page), waitForTimesheetLoad(page)]);
+
+    const row = page.locator('[data-testid="timesheet_row"]').first();
+    const cells = row.locator('[data-testid="timesheet_cell"]');
+    const mondayInput = cells.first().locator('input');
+
+    await mondayInput.click();
+    await mondayInput.fill('0');
+
+    const [response] = await Promise.all([
+        page.waitForResponse(
+            (resp) =>
+                resp.url().includes('/time-entries') &&
+                resp.request().method() === 'DELETE' &&
+                resp.status() === 200
+        ),
+        mondayInput.press('Enter'),
+    ]);
+
+    expect(response.status()).toBe(200);
+});
+
+test('Escape during cell edit reverts the displayed value without an API call', async ({
+    page,
+    ctx,
+}) => {
+    const monday = getCurrentWeekMonday();
+    const project = await createProjectViaApi(ctx, { name: 'Escape Cancel Test' });
+
+    await createTimeEntryOnDateViaApi(ctx, {
+        date: monday,
+        duration: '2h',
+        projectId: project.id,
+    });
+
+    await Promise.all([goToTimesheet(page), waitForTimesheetLoad(page)]);
+
+    const row = page.locator('[data-testid="timesheet_row"]').first();
+    const cells = row.locator('[data-testid="timesheet_cell"]');
+    const mondayInput = cells.first().locator('input');
+
+    // Capture the formatted display value before editing.
+    const originalValue = await mondayInput.inputValue();
+    expect(originalValue).toMatch(/2/);
+
+    let mutationFired = false;
+    page.on('request', (req) => {
+        if (req.url().includes('/time-entries') && req.method() !== 'GET') {
+            mutationFired = true;
+        }
+    });
+
+    await mondayInput.click();
+    await mondayInput.fill('5');
+    await mondayInput.press('Escape');
+
+    // The Escape handler reverts the displayed value synchronously, so
+    // once this assertion passes we know the handler ran. Any mutation
+    // request would have been queued by then.
+    await expect(mondayInput).toHaveValue(originalValue);
+    expect(mutationFired).toBe(false);
+});
+
+// ──────────────────────────────────────────────────
+// Week Navigation
+// ──────────────────────────────────────────────────
+
+test('navigating to previous week shows entries from that week', async ({ page, ctx }) => {
+    const lastMonday = getLastWeekMonday();
+    const project = await createProjectViaApi(ctx, { name: 'Last Week Project' });
+
+    await createTimeEntryOnDateViaApi(ctx, {
+        date: lastMonday,
+        duration: '2h',
+        projectId: project.id,
+    });
+
+    await Promise.all([goToTimesheet(page), waitForTimesheetLoad(page)]);
+
+    // Current week should have no entries
+    await expect(page.locator('[data-testid="timesheet_row"]')).toHaveCount(0);
+
+    // Go to previous week — the row-count assertion below auto-retries
+    // until the new week's data arrives.
+    await page.getByTestId('timesheet_prev_week').click();
+
+    // Should now see the entry
+    const rows = page.locator('[data-testid="timesheet_row"]');
+    await expect(rows).toHaveCount(1);
+});
+
+test('can navigate forward and return to current week', async ({ page }) => {
+    await Promise.all([goToTimesheet(page), waitForTimesheetLoad(page)]);
+
+    // Should show "This week"
+    await expect(page.getByTestId('timesheet_week_display')).toContainText('This week');
+
+    // Go to next week — the text assertions below auto-retry until the
+    // header label flips.
+    await page.getByTestId('timesheet_next_week').click();
+
+    // Should no longer show "This week"
+    await expect(page.getByTestId('timesheet_week_display')).not.toContainText('This week');
+
+    // Go back to this week
+    await page.getByTestId('timesheet_week_display').click();
+
+    await expect(page.getByTestId('timesheet_week_display')).toContainText('This week');
+});
+
+// ──────────────────────────────────────────────────
+// Copy Last Week
+// ──────────────────────────────────────────────────
+
+test('copy last week adds project rows from previous week without hours', async ({ page, ctx }) => {
+    const lastMonday = getLastWeekMonday();
+    const lastWednesday = getDayOfWeek(lastMonday, 2);
+
+    const projectA = await createProjectViaApi(ctx, { name: 'Copy Project A' });
+    const projectB = await createProjectViaApi(ctx, { name: 'Copy Project B' });
+
+    await createTimeEntryOnDateViaApi(ctx, {
+        date: lastMonday,
+        duration: '2h',
+        projectId: projectA.id,
+    });
+    await createTimeEntryOnDateViaApi(ctx, {
+        date: lastWednesday,
+        duration: '3h',
+        projectId: projectB.id,
+    });
+
+    await Promise.all([goToTimesheet(page), waitForTimesheetLoad(page)]);
+
+    // Current week should have no populated rows yet.
+    await expect(page.locator('[data-testid="timesheet_row"]')).toHaveCount(0);
+
+    // Open copy last week dropdown and click "Copy rows only"
+    await page.getByRole('button', { name: /Copy last week/i }).click();
+    await page.getByText('Copy rows only').click();
+
+    // Should now show 2 rows (one per project)
+    const rows = page.locator('[data-testid="timesheet_row"]');
+    await expect(rows).toHaveCount(2);
+
+    // All row totals should be 0
+    const rowTotals = page.locator('[data-testid="timesheet_row_total"]');
+    const count = await rowTotals.count();
+    for (let i = 0; i < count; i++) {
+        await expect(rowTotals.nth(i)).toContainText('-');
+    }
+});
+
+test('copy last week does not duplicate rows that already exist', async ({ page, ctx }) => {
+    const lastMonday = getLastWeekMonday();
+    const thisMonday = getCurrentWeekMonday();
+    const thisTuesday = getDayOfWeek(thisMonday, 1);
+
+    const project = await createProjectViaApi(ctx, { name: 'No Dup Project' });
+
+    // Create entry for last week
+    await createTimeEntryOnDateViaApi(ctx, {
+        date: lastMonday,
+        duration: '2h',
+        projectId: project.id,
+    });
+
+    // Create entry for current week
+    await createTimeEntryOnDateViaApi(ctx, {
+        date: thisTuesday,
+        duration: '1h',
+        projectId: project.id,
+    });
+
+    await Promise.all([goToTimesheet(page), waitForTimesheetLoad(page)]);
+
+    // Should have 1 row (from current week entry)
+    const rows = page.locator('[data-testid="timesheet_row"]');
+    await expect(rows).toHaveCount(1);
+
+    // Open copy last week dropdown and click "Copy rows only"
+    await page.getByRole('button', { name: /Copy last week/i }).click();
+    await page.getByText('Copy rows only').click();
+
+    // Should still have only 1 row (not duplicated)
+    await expect(rows).toHaveCount(1);
+});
+
+test('copy last week with time entries creates rows and entries', async ({ page, ctx }) => {
+    const lastMonday = getLastWeekMonday();
+
+    const project = await createProjectViaApi(ctx, { name: 'Copy Time Project' });
+
+    await createTimeEntryOnDateViaApi(ctx, {
+        date: lastMonday,
+        duration: '2h',
+        projectId: project.id,
+    });
+
+    await Promise.all([goToTimesheet(page), waitForTimesheetLoad(page)]);
+
+    // Current week should have no populated rows yet.
+    await expect(page.locator('[data-testid="timesheet_row"]')).toHaveCount(0);
+
+    // Open copy last week dropdown and click "Copy rows and time entries"
+    await page.getByRole('button', { name: /Copy last week/i }).click();
+
+    await Promise.all([
+        page.waitForResponse(
+            (resp) =>
+                resp.url().includes('/time-entries') &&
+                resp.request().method() === 'POST' &&
+                resp.status() === 201
+        ),
+        page.getByText('Copy rows and time entries').click(),
+    ]);
+
+    // Should now show 1 row with time entries
+    const rows = page.locator('[data-testid="timesheet_row"]');
+    await expect(rows).toHaveCount(1);
+
+    // Row total should not be 0 (entries were copied)
+    const rowTotal = page.locator('[data-testid="timesheet_row_total"]').first();
+    await expect(rowTotal).not.toContainText('0 h');
+});
+
+// ──────────────────────────────────────────────────
+// Row Removal
+// ──────────────────────────────────────────────────
+
+test('can remove an empty project row without confirmation', async ({ page, ctx }) => {
+    const project = await createProjectViaApi(ctx, { name: 'Empty Remove Project' });
+
+    await Promise.all([goToTimesheet(page), waitForTimesheetLoad(page)]);
+
+    await chooseRowIdentity(page, project.name);
+
+    const rows = page.locator('[data-testid="timesheet_row"]');
+    await expect(rows).toHaveCount(1);
+
+    // Hover the row to reveal the X button, then click it
+    await rows.first().hover();
+    await rows.first().getByRole('button', { name: 'Remove row' }).click();
+
+    // Row should be removed immediately (no dialog)
+    await expect(rows).toHaveCount(0);
+});
+
+test('removing a row with entries shows confirmation dialog and deletes entries', async ({
+    page,
+    ctx,
+}) => {
+    const monday = getCurrentWeekMonday();
+    const project = await createProjectViaApi(ctx, { name: 'Delete Row Project' });
+
+    await createTimeEntryOnDateViaApi(ctx, {
+        date: monday,
+        duration: '2h',
+        projectId: project.id,
+    });
+
+    await Promise.all([goToTimesheet(page), waitForTimesheetLoad(page)]);
+
+    const rows = page.locator('[data-testid="timesheet_row"]');
+    await expect(rows).toHaveCount(1);
+
+    // Hover and click X
+    await rows.first().hover();
+    await rows.first().getByRole('button', { name: 'Remove row' }).click();
+
+    // Confirmation dialog should appear
+    await expect(page.getByRole('alertdialog')).toBeVisible();
+    await expect(page.getByText('Remove timesheet row?')).toBeVisible();
+
+    // Click Delete
+    await Promise.all([
+        page.waitForResponse(
+            (resp) =>
+                resp.url().includes('/time-entries') &&
+                resp.request().method() === 'DELETE' &&
+                resp.status() === 200
+        ),
+        page
+            .getByRole('alertdialog')
+            .getByRole('button', { name: /Delete/i })
+            .click(),
+    ]);
+
+    // Row should be gone
+    await expect(rows).toHaveCount(0);
+});
+
+// ──────────────────────────────────────────────────
+// Multiple Entries Same Cell
+// ──────────────────────────────────────────────────
+
+test('cell correctly sums multiple entries for same project+day', async ({ page, ctx }) => {
+    const monday = getCurrentWeekMonday();
+    const project = await createProjectViaApi(ctx, { name: 'Sum Test' });
+
+    // Create 2 entries for the same project on Monday
+    await createTimeEntryOnDateViaApi(ctx, {
+        date: monday,
+        duration: '1h',
+        projectId: project.id,
+        description: 'Entry 1',
+    });
+    await createTimeEntryOnDateViaApi(ctx, {
+        date: monday,
+        duration: '2h',
+        projectId: project.id,
+        description: 'Entry 2',
+    });
+
+    await Promise.all([goToTimesheet(page), waitForTimesheetLoad(page)]);
+
+    // Should be 1 row (both entries grouped)
+    const rows = page.locator('[data-testid="timesheet_row"]');
+    await expect(rows).toHaveCount(1);
+
+    // The Monday cell should show 3h total
+    const cells = rows.first().locator('[data-testid="timesheet_cell"]');
+    const mondayInput = cells.first().locator('input');
+    // The value should contain "3" (for 3h in some format)
+    await expect(mondayInput).toHaveValue(/3/);
+});
+
+// ──────────────────────────────────────────────────
+// Duration Input Formats
+// ──────────────────────────────────────────────────
+
+test('cell accepts various duration input formats', async ({ page, ctx }) => {
+    await createProjectViaApi(ctx, { name: 'Format Test' });
+
+    await Promise.all([goToTimesheet(page), waitForTimesheetLoad(page)]);
+
+    await chooseRowIdentity(page, 'Format Test');
+
+    const row = page.locator('[data-testid="timesheet_row"]').first();
+
+    // Test entering "1.5" (should be 1h 30min)
+    const cells = row.locator('[data-testid="timesheet_cell"]');
+    const mondayInput = cells.first().locator('input');
+
+    await mondayInput.click();
+    await mondayInput.fill('1.5');
+
+    await Promise.all([
+        page.waitForResponse(
+            (resp) =>
+                resp.url().includes('/time-entries') &&
+                resp.request().method() === 'POST' &&
+                resp.status() === 201
+        ),
+        mondayInput.press('Enter'),
+    ]);
+
+    // 1.5 hours = 1h 30min
+    await expect(mondayInput).toHaveValue('1h 30min');
+});

e2e/timetracker.spec.ts

@@ -9,7 +9,7 @@ import {
 } from './utils/currentTimeEntry';
 import type { Page } from '@playwright/test';
 import { newTagResponse } from './utils/tags';
-import { updateOrganizationCurrencyViaWeb } from './utils/api';
+import { createProjectViaApi, updateOrganizationCurrencyViaWeb } from './utils/api';
 
 // Date picker button name patterns for different date formats
 const DATE_DISPLAY_PATTERN = /^\d{4}-\d{2}-\d{2}$|^\d{2}\/\d{2}\/\d{4}$|^\d{2}\.\d{2}\.\d{4}$/;
@@ -368,6 +368,45 @@ test('test that timer started on dashboard is visible on time page', async ({ pa
     await assertThatTimerIsStopped(page);
 });
 
+test('test that creating a new project from the time tracker dropdown prefills the search text', async ({
+    page,
+    ctx,
+}) => {
+    const existingProjectName = 'Existing Project ' + Math.floor(Math.random() * 10000);
+    const searchText = 'PrefillProject ' + Math.floor(Math.random() * 10000);
+
+    // Create a project so the dropdown renders (not the "Add new project" button)
+    await createProjectViaApi(ctx, { name: existingProjectName });
+    await goToDashboard(page);
+
+    // Open the project dropdown
+    await page.getByRole('button', { name: 'No Project' }).click();
+
+    // Type a search term that won't match any existing project
+    await page.getByTestId('client_dropdown_search').fill(searchText);
+
+    // Click "Create new Project"
+    await page.getByText('Create new Project').click();
+
+    // Verify the project name input is pre-filled with the search text
+    await expect(page.getByLabel('Project name')).toHaveValue(searchText);
+
+    // Complete project creation to verify full flow works
+    await Promise.all([
+        page.waitForResponse(
+            async (response) =>
+                response.url().includes('/projects') &&
+                response.request().method() === 'POST' &&
+                response.status() === 201 &&
+                (await response.json()).data.name === searchText
+        ),
+        page.getByRole('button', { name: 'Create Project' }).click(),
+    ]);
+
+    // The project dropdown should now show the newly created project
+    await expect(page.getByRole('button', { name: searchText })).toBeVisible();
+});
+
 test('test that adding a project and tag before starting timer works', async ({ page }) => {
     const newTagName = 'TimerTag ' + Math.floor(Math.random() * 10000);
     await goToDashboard(page);

e2e/utils/api.ts

@@ -170,10 +170,24 @@ function parseDurationToSeconds(duration: string): number {
     return totalSeconds;
 }
 
+/**
+ * Builds a start/end pair anchored to 09:00 UTC on today's UTC date.
+ *
+ * Intentionally pinned to UTC (rather than the runner's local time) so
+ * the produced timestamps are identical regardless of where the suite
+ * runs. Playwright test users default to UTC, so this matches what the
+ * app will see and keeps day-of-week / "this week" assertions stable
+ * for developers running the suite locally in non-UTC timezones.
+ */
 function createTimestamps(duration: string): { start: string; end: string } {
     const durationSeconds = parseDurationToSeconds(duration);
     const now = new Date();
-    const start = new Date(now.getFullYear(), now.getMonth(), now.getDate(), 9, 0, 0);
+    const start = createUtcTimestampFromDateParts(
+        now.getUTCFullYear(),
+        now.getUTCMonth(),
+        now.getUTCDate(),
+        9
+    );
     const end = new Date(start.getTime() + durationSeconds * 1000);
 
     return {
@@ -186,6 +200,32 @@ function formatTimestamp(date: Date): string {
     return date.toISOString().replace(/\.\d{3}Z$/, 'Z');
 }
 
+function createUtcTimestampFromDateParts(
+    year: number,
+    month: number,
+    date: number,
+    hours: number,
+    minutes: number = 0,
+    seconds: number = 0
+): Date {
+    return new Date(Date.UTC(year, month, date, hours, minutes, seconds));
+}
+
+function createTimestampsOnDate(date: Date, duration: string): { start: string; end: string } {
+    const durationSeconds = parseDurationToSeconds(duration);
+    const start = createUtcTimestampFromDateParts(
+        date.getUTCFullYear(),
+        date.getUTCMonth(),
+        date.getUTCDate(),
+        9
+    );
+    const end = new Date(start.getTime() + durationSeconds * 1000);
+    return {
+        start: formatTimestamp(start),
+        end: formatTimestamp(end),
+    };
+}
+
 function randomColor(): string {
     const colors = [
         '#ef5350',
@@ -375,6 +415,39 @@ export async function createTimeEntryViaApi(
     return body.data as { id: string; start: string; end: string; description: string };
 }
 
+export async function createTimeEntryOnDateViaApi(
+    ctx: TestContext,
+    data: {
+        date: Date;
+        duration: string;
+        description?: string;
+        projectId?: string | null;
+        taskId?: string | null;
+        tags?: string[];
+        billable?: boolean;
+    }
+) {
+    const { start, end } = createTimestampsOnDate(data.date, data.duration);
+    const response = await ctx.request.post(
+        `${PLAYWRIGHT_BASE_URL}/api/v1/organizations/${ctx.orgId}/time-entries`,
+        {
+            data: {
+                member_id: ctx.memberId,
+                start,
+                end,
+                description: data.description ?? '',
+                project_id: data.projectId ?? null,
+                task_id: data.taskId ?? null,
+                tags: data.tags ?? [],
+                billable: data.billable ?? false,
+            },
+        }
+    );
+    expect(response.status()).toBe(201);
+    const body = await response.json();
+    return body.data as { id: string; start: string; end: string; description: string };
+}
+
 export async function createProjectMemberViaApi(
     ctx: TestContext,
     projectId: string,
@@ -613,6 +686,72 @@ export async function getInvitationsViaApi(ctx: TestContext) {
 // Timestamp-based time entry helpers
 // ──────────────────────────────────────────────────
 
+/**
+ * Creates a time entry on `date` at a specific UTC hour with a duration
+ * in seconds. Playwright test users default to the UTC timezone, so this
+ * keeps time-placement scenarios stable across runner locales.
+ */
+export async function createTimeEntryAtHourViaApi(
+    ctx: TestContext,
+    data: {
+        date: Date;
+        startHour: number;
+        startMinute?: number;
+        durationSeconds: number;
+        projectId?: string | null;
+        taskId?: string | null;
+        description?: string;
+    }
+) {
+    const start = createUtcTimestampFromDateParts(
+        data.date.getUTCFullYear(),
+        data.date.getUTCMonth(),
+        data.date.getUTCDate(),
+        data.startHour,
+        data.startMinute ?? 0
+    );
+    const end = new Date(start.getTime() + data.durationSeconds * 1000);
+    return createTimeEntryWithTimestampsViaApi(ctx, {
+        start: formatTimestamp(start),
+        end: formatTimestamp(end),
+        projectId: data.projectId ?? null,
+        taskId: data.taskId ?? null,
+        description: data.description ?? '',
+    });
+}
+
+/**
+ * Reads time entries for the current member, optionally filtered to a
+ * date range. Returns the raw API objects (id, start, end, project_id,
+ * etc.) so tests can assert on the database state after a UI action.
+ */
+export async function getTimeEntriesViaApi(
+    ctx: TestContext,
+    filters: { start?: string; end?: string } = {}
+): Promise<
+    Array<{
+        id: string;
+        start: string;
+        end: string | null;
+        duration: number | null;
+        project_id: string | null;
+        task_id: string | null;
+        description: string;
+    }>
+> {
+    const params = new URLSearchParams();
+    params.set('member_id', ctx.memberId);
+    if (filters.start) params.set('start', filters.start);
+    if (filters.end) params.set('end', filters.end);
+
+    const response = await ctx.request.get(
+        `${PLAYWRIGHT_BASE_URL}/api/v1/organizations/${ctx.orgId}/time-entries?${params.toString()}`
+    );
+    expect(response.status()).toBe(200);
+    const body = await response.json();
+    return body.data;
+}
+
 export async function createTimeEntryWithTimestampsViaApi(
     ctx: TestContext,
     data: {

package.json

@@ -12,10 +12,17 @@
         "lint": "eslint resources/js",
         "lint:fix": "eslint --fix resources/js",
         "type-check": "vue-tsc --noEmit",
+        "test:unit": "vitest run",
+        "test:unit:watch": "vitest",
         "test:e2e": "rm -rf test-results/.auth && npx playwright test",
         "zod:generate": "npx openapi-zod-client http://localhost:80/docs/api.json --output resources/js/packages/api/src/openapi.json.client.ts --base-url /api",
         "format": "prettier --write './**/*.{js,jsx,cjs,mjs,ts,tsx,cts,mts,vue}'",
-        "format:check": "prettier --check './**/*.{js,jsx,cjs,mjs,ts,tsx,cts,mts,vue}'"
+        "format:check": "prettier --check './**/*.{js,jsx,cjs,mjs,ts,tsx,cts,mts,vue}'",
+        "build:ui": "npm run build --workspace=@solidtime/ui",
+        "build:api": "npm run build --workspace=@solidtime/api",
+        "build:packages": "npm run build:api && npm run build:ui",
+        "watch:ui": "npm run watch --workspace=@solidtime/ui",
+        "watch:api": "npm run watch --workspace=@solidtime/api"
     },
     "devDependencies": {
         "@eslint/eslintrc": "^3.2.0",
@@ -27,10 +34,12 @@
         "@types/chroma-js": "^3.1.0",
         "@types/node": "^22.10.10",
         "@vitejs/plugin-vue": "^6.0.3",
+        "@vue/test-utils": "^2.4.6",
         "@vue/tsconfig": "^0.8.0",
         "autoprefixer": "^10.4.20",
         "axios": "^1.6.4",
         "eslint-plugin-unused-imports": "^4.1.4",
+        "happy-dom": "^20.8.9",
         "laravel-vite-plugin": "^2.1.0",
         "openapi-zod-client": "^1.16.2",
         "postcss": "^8.4.47",
@@ -40,6 +49,7 @@
         "typescript": "^5.7.3",
         "vite": "^7.0.0",
         "vite-plugin-checker": "^0.12.0",
+        "vitest": "^4.1.4",
         "vue": "^3.5.0",
         "vue-tsc": "^3.0.0"
     },
@@ -68,7 +78,7 @@
         "parse-duration": "^2.0.1",
         "pinia": "^3.0.0",
         "radix-vue": "^1.9.6",
-        "reka-ui": "^2.8.2",
+        "reka-ui": "2.8.2",
         "tailwind-merge": "^2.6.0",
         "tailwindcss-animate": "^1.0.7",
         "vue-echarts": "^8.0.0",

resources/js/Components/Common/Client/ClientTableRow.vue

@@ -57,11 +57,11 @@ const showEditModal = ref(false);
                     </span>
                 </div>
                 <div
-                    class="whitespace-nowrap flex items-center px-3 py-4 text-sm font-medium text-text-primary">
-                    <span class="text-text-secondary"> {{ projectCount }} Projects </span>
+                    class="whitespace-nowrap flex items-center px-3 py-4 text-sm text-text-primary">
+                    <span> {{ projectCount }} Projects </span>
                 </div>
                 <div
-                    class="whitespace-nowrap px-3 py-4 text-sm text-text-secondary flex space-x-1.5 items-center font-medium">
+                    class="whitespace-nowrap px-3 py-4 text-sm text-text-primary flex space-x-1.5 items-center">
                     <template v-if="client.is_archived">
                         <ArchiveBoxIcon class="w-4 text-icon-default"></ArchiveBoxIcon>
                         <span>Archived</span>

resources/js/Components/Common/Member/MemberTableRow.vue

@@ -83,27 +83,28 @@ const userHasValidMailAddress = computed(() => {
                         {{ member.name }}
                     </span>
                 </div>
-                <div class="whitespace-nowrap px-3 py-4 text-sm text-text-secondary">
+                <div class="whitespace-nowrap px-3 py-4 text-sm text-text-primary">
                     {{ member.email }}
                 </div>
-                <div class="whitespace-nowrap px-3 py-4 text-sm text-text-secondary">
+                <div class="whitespace-nowrap px-3 py-4 text-sm text-text-primary">
                     {{ capitalizeFirstLetter(member.role) }}
                 </div>
-                <div class="whitespace-nowrap px-3 py-4 text-sm text-text-secondary">
-                    {{
-                        member.billable_rate
-                            ? formatCents(
-                                  member.billable_rate,
-                                  organization?.currency,
-                                  organization?.currency_format,
-                                  organization?.currency_symbol,
-                                  organization?.number_format
-                              )
-                            : '--'
-                    }}
+                <div class="whitespace-nowrap px-3 py-4 text-sm text-text-primary">
+                    <span v-if="member.billable_rate">
+                        {{
+                            formatCents(
+                                member.billable_rate,
+                                organization?.currency,
+                                organization?.currency_format,
+                                organization?.currency_symbol,
+                                organization?.number_format
+                            )
+                        }}
+                    </span>
+                    <span v-else class="text-text-tertiary"> -- </span>
                 </div>
                 <div
-                    class="whitespace-nowrap px-3 py-4 text-sm text-text-secondary flex space-x-1.5 items-center font-medium">
+                    class="whitespace-nowrap px-3 py-4 text-sm text-text-primary flex space-x-1.5 items-center">
                     <template v-if="member.is_placeholder === false">
                         <CheckCircleIcon class="w-4 text-icon-default"></CheckCircleIcon>
                         <span>Active</span>

resources/js/Components/Common/Project/ProjectTableRow.vue

@@ -72,7 +72,7 @@ const billableRateInfo = computed(() => {
             return 'Default Rate';
         }
     }
-    return '--';
+    return null;
 });
 
 const showEditProjectModal = ref(false);
@@ -98,13 +98,13 @@ const showEditProjectModal = ref(false);
                     </span>
                     <span class="text-text-secondary"> {{ projectTasksCount }} Tasks </span>
                 </div>
-                <div class="whitespace-nowrap min-w-0 px-3 py-4 text-sm text-text-secondary">
+                <div class="whitespace-nowrap min-w-0 px-3 py-4 text-sm text-text-primary">
                     <div v-if="project.client_id" class="overflow-ellipsis overflow-hidden">
                         {{ client?.name }}
                     </div>
-                    <div v-else>No client</div>
+                    <div v-else class="text-text-tertiary">No client</div>
                 </div>
-                <div class="whitespace-nowrap px-3 py-4 text-sm text-text-secondary">
+                <div class="whitespace-nowrap px-3 py-4 text-sm text-text-primary">
                     <div v-if="project.spent_time">
                         {{
                             formatHumanReadableDuration(
@@ -114,23 +114,24 @@ const showEditProjectModal = ref(false);
                             )
                         }}
                     </div>
-                    <div v-else>--</div>
+                    <div v-else class="text-text-tertiary">--</div>
                 </div>
-                <div class="whitespace-nowrap px-3 flex items-center text-sm text-text-secondary">
+                <div class="whitespace-nowrap px-3 flex items-center text-sm text-text-primary">
                     <UpgradeBadge v-if="!isAllowedToPerformPremiumAction()"></UpgradeBadge>
                     <EstimatedTimeProgress
                         v-else-if="project.estimated_time"
                         :estimated="project.estimated_time"
                         :current="project.spent_time"></EstimatedTimeProgress>
-                    <span v-else> -- </span>
+                    <span v-else class="text-text-tertiary"> -- </span>
                 </div>
                 <div
                     v-if="showBillableRate"
-                    class="whitespace-nowrap px-3 py-4 text-sm text-text-secondary">
-                    {{ billableRateInfo }}
+                    class="whitespace-nowrap px-3 py-4 text-sm text-text-primary">
+                    <span v-if="billableRateInfo">{{ billableRateInfo }}</span>
+                    <span v-else class="text-text-tertiary">--</span>
                 </div>
                 <div
-                    class="whitespace-nowrap px-3 py-4 text-sm text-text-secondary flex space-x-1.5 items-center font-medium">
+                    class="whitespace-nowrap px-3 py-4 text-sm text-text-primary flex space-x-1.5 items-center font-medium">
                     <template v-if="project.is_archived">
                         <ArchiveBoxIcon class="w-4 text-icon-default"></ArchiveBoxIcon>
                         <span>Archived</span>

resources/js/Components/Common/Reporting/ReportingChart.vue

@@ -2,7 +2,7 @@
 import VChart, { THEME_KEY } from 'vue-echarts';
 import { computed, provide, inject, shallowRef, type ComputedRef } from 'vue';
 import LinearGradient from 'zrender/lib/graphic/LinearGradient';
-import { formatDate, formatHumanReadableDuration, formatWeek } from '@/packages/ui/src/utils/time';
+import { formatDate, formatReportingDuration, formatWeek } from '@/packages/ui/src/utils/time';
 import { use } from 'echarts/core';
 import { CanvasRenderer } from 'echarts/renderers';
 import { BarChart } from 'echarts/charts';
@@ -137,7 +137,7 @@ const option = computed(() => ({
             type: 'bar',
             tooltip: {
                 valueFormatter: (value: number) => {
-                    return formatHumanReadableDuration(
+                    return formatReportingDuration(
                         value,
                         organization?.value?.interval_format,
                         organization?.value?.number_format

resources/js/Components/Common/Reporting/ReportingOverview.vue

@@ -8,7 +8,7 @@ import {
 import { SaveIcon } from 'lucide-vue-next';
 import { getOrganizationCurrencyString } from '@/utils/money';
 import {
-    formatHumanReadableDuration,
+    formatReportingDuration,
     getDayJsInstance,
     getLocalizedDayJs,
 } from '@/packages/ui/src/utils/time';
@@ -426,7 +426,7 @@ const tableData = computed(() => {
                                 class="justify-end flex items-center font-medium"
                                 :class="!showBillableRate ? 'pr-6' : ''">
                                 {{
-                                    formatHumanReadableDuration(
+                                    formatReportingDuration(
                                         aggregatedTableTimeEntries.seconds,
                                         organization?.interval_format,
                                         organization?.number_format

resources/js/Components/Common/Reporting/ReportingPieChart.vue

@@ -10,7 +10,7 @@ import {
     TitleComponent,
     TooltipComponent,
 } from 'echarts/components';
-import { formatHumanReadableDuration } from '@/packages/ui/src/utils/time';
+import { formatReportingDuration } from '@/packages/ui/src/utils/time';
 import { useCssVariable } from '@/packages/ui/src';
 import type { Organization } from '@/packages/api/src';
 
@@ -67,7 +67,7 @@ const option = computed(() => ({
             },
             tooltip: {
                 valueFormatter: (value: number) => {
-                    return formatHumanReadableDuration(
+                    return formatReportingDuration(
                         value,
                         organization?.value?.interval_format,
                         organization?.value?.number_format

resources/js/Components/Common/Reporting/ReportingRow.vue

@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { formatHumanReadableDuration } from '@/packages/ui/src/utils/time';
+import { formatReportingDuration } from '@/packages/ui/src/utils/time';
 import { formatCents } from '@/packages/ui/src/utils/money';
 import GroupedItemsCountButton from '@/packages/ui/src/GroupedItemsCountButton.vue';
 import { ref, inject, type ComputedRef } from 'vue';
@@ -44,7 +44,7 @@ const organization = inject<ComputedRef<Organization>>('organization');
         </div>
         <div class="justify-end flex items-center" :class="!showCost ? 'pr-6' : ''">
             {{
-                formatHumanReadableDuration(
+                formatReportingDuration(
                     entry.seconds,
                     organization?.interval_format,
                     organization?.number_format

resources/js/Components/Common/StatCard.vue

@@ -7,8 +7,8 @@ defineProps<{
 
 <template>
     <div class="rounded-lg bg-card-background border-card-border shadow-card border px-3.5 py-2.5">
-        <dt class="font-semibold text-sm text-text-secondary">{{ title }}</dt>
-        <dd class="text-xl text-text-primary pt-1 font-semibold">
+        <dt class="font-medium text-sm text-text-secondary">{{ title }}</dt>
+        <dd class="text-xl text-text-primary pt-1 font-medium">
             {{ value ?? '--' }}
         </dd>
     </div>

resources/js/Components/Dashboard/DayOverviewCardEntry.vue

@@ -23,7 +23,7 @@ defineProps<{
         <div class="items-center justify-center flex-1 hidden @2xs:flex">
             <DayOverviewCardChart :history="history"></DayOverviewCardChart>
         </div>
-        <div class="flex text-sm items-center justify-center text-text-secondary min-w-[65px]">
+        <div class="flex text-sm items-center justify-center text-text-primary min-w-[65px]">
             {{
                 formatHumanReadableDuration(
                     duration,

resources/js/Components/Dashboard/RecentlyTrackedTasksCardEntry.vue

@@ -47,9 +47,9 @@ async function startTaskTimer() {
 <template>
     <div class="px-3.5 py-2 grid grid-cols-5">
         <div class="col-span-4">
-            <p class="text-text-secondary text-sm pb-1.5 truncate">
+            <p class="text-text-primary text-sm pb-1.5 truncate">
                 <span v-if="timeEntry.description"> {{ timeEntry.description }}</span>
-                <span v-else>No description</span>
+                <span v-else class="text-text-secondary">No description</span>
             </p>
             <ProjectBadge size="base" class="min-w-0 max-w-full" :color="project?.color">
                 <div class="flex items-center lg:space-x-0.5 min-w-0">

resources/js/Components/Dashboard/TeamActivityCard.vue

@@ -48,7 +48,7 @@ const { data: latestTeamActivity, isLoading } = useQuery({
             class="text-center flex flex-1 justify-center items-center">
             <div>
                 <UserGroupIcon class="w-8 text-icon-default inline pb-2"></UserGroupIcon>
-                <h3 class="text-text-primary font-semibold text-sm">Invite your co-workers</h3>
+                <h3 class="text-text-primary font-medium text-sm">Invite your co-workers</h3>
                 <p class="pb-5 text-sm">You can invite your entire team.</p>
                 <SecondaryButton @click="router.visit(route('members'))"
                     >Go to Members

resources/js/Components/Dashboard/TeamActivityCardEntry.vue

@@ -11,7 +11,7 @@ defineProps<{
         <div class="col-span-2">
             <div class="flex justify-between">
                 <p
-                    class="text-xs min-w-0 overflow-ellipsis overflow-hidden flex-1 text-text-secondary">
+                    class="text-sm font-medium min-w-0 overflow-ellipsis overflow-hidden flex-1 text-text-primary">
                     {{ name }}
                 </p>
                 <div v-if="working" class="flex space-x-1.5 items-center justify-end">
@@ -20,11 +20,11 @@ defineProps<{
                             class="animate-ping absolute inline-flex h-full w-full rounded-full bg-green-500 opacity-75"></span>
                         <span class="relative inline-flex rounded-full h-2 w-2 bg-green-500"></span>
                     </span>
-                    <span class="text-green-500 font-medium text-sm block pb-0.5"> working </span>
+                    <span class="text-green-500 text-sm block pb-0.5"> working </span>
                 </div>
             </div>
             <div
-                class="text-text-secondary text-sm font-medium text-ellipsis whitespace-nowrap max-w-full overflow-hidden">
+                class="text-text-secondary text-sm text-ellipsis whitespace-nowrap max-w-full overflow-hidden">
                 {{ description }}
             </div>
         </div>

resources/js/Components/Dashboard/ThisWeekOverview.vue

@@ -16,7 +16,7 @@ import CardTitle from '@/packages/ui/src/CardTitle.vue';
 import LinearGradient from 'zrender/lib/graphic/LinearGradient';
 import ProjectsChartCard from '@/Components/Dashboard/ProjectsChartCard.vue';
 import ThisWeekReportingTable from '@/Components/Dashboard/ThisWeekReportingTable.vue';
-import { formatHumanReadableDuration } from '@/packages/ui/src/utils/time';
+import { formatReportingDuration } from '@/packages/ui/src/utils/time';
 import { formatCents } from '@/packages/ui/src/utils/money';
 import { getWeekStart } from '@/packages/ui/src/utils/settings';
 import { useCssVariable } from '@/packages/ui/src';
@@ -223,7 +223,7 @@ const option = computed(() => {
                 type: 'bar',
                 tooltip: {
                     valueFormatter: (value: number) => {
-                        return formatHumanReadableDuration(
+                        return formatReportingDuration(
                             value,
                             organization?.value?.interval_format,
                             organization?.value?.number_format
@@ -252,7 +252,7 @@ const option = computed(() => {
                 title="Spent Time"
                 :value="
                     totalWeeklyTime
-                        ? formatHumanReadableDuration(
+                        ? formatReportingDuration(
                               totalWeeklyTime,
                               organization?.interval_format,
                               organization?.number_format
@@ -263,7 +263,7 @@ const option = computed(() => {
                 title="Billable Time"
                 :value="
                     totalWeeklyBillableTime
-                        ? formatHumanReadableDuration(
+                        ? formatReportingDuration(
                               totalWeeklyBillableTime,
                               organization?.interval_format,
                               organization?.number_format

resources/js/Components/Dashboard/ThisWeekReportingTable.vue

@@ -2,7 +2,7 @@
 import ReportingRow from '@/Components/Common/Reporting/ReportingRow.vue';
 import ReportingGroupBySelect from '@/Components/Common/Reporting/ReportingGroupBySelect.vue';
 import {
-    formatHumanReadableDuration,
+    formatReportingDuration,
     getDayJsInstance,
     getLocalizedDayJs,
 } from '@/packages/ui/src/utils/time';
@@ -174,7 +174,7 @@ const showBillableRate = computed(() => {
                         class="justify-end flex items-center font-medium"
                         :class="!showBillableRate ? 'pr-6' : ''">
                         {{
-                            formatHumanReadableDuration(
+                            formatReportingDuration(
                                 aggregatedTableTimeEntries.seconds,
                                 organization?.interval_format,
                                 organization?.number_format

resources/js/Components/NavigationSidebarItem.vue

@@ -28,7 +28,7 @@ const open = useSessionStorage('nav-collapse-state-' + props.title, true);
         <CollapsibleRoot v-else v-model:open="open"
             ><CollapsibleTrigger class="w-full group py-0.5">
                 <div
-                    class="text-text-secondary group-hover:text-text-primary group-hover:bg-menu-active group flex gap-x-2 rounded-md transition leading-6 py-0.5 px-2 font-medium text-sm items-center justify-between">
+                    class="text-text-secondary group-hover:text-text-primary group-hover:bg-menu-active group flex gap-x-2 rounded-md transition leading-6 py-0.5 px-2 font-regular text-sm items-center justify-between">
                     <div class="flex items-center gap-x-2">
                         <component
                             :is="icon"

resources/js/Components/Timesheet/RemoveRowDialog.vue

@@ -0,0 +1,46 @@
+<script setup lang="ts">
+import {
+    AlertDialog,
+    AlertDialogAction,
+    AlertDialogCancel,
+    AlertDialogContent,
+    AlertDialogDescription,
+    AlertDialogFooter,
+    AlertDialogHeader,
+    AlertDialogTitle,
+} from '@/Components/ui/alert-dialog';
+
+defineProps<{
+    open: boolean;
+    entryCount: number;
+    projectName: string;
+}>();
+
+defineEmits<{
+    (e: 'update:open', value: boolean): void;
+    (e: 'confirm'): void;
+}>();
+</script>
+
+<template>
+    <AlertDialog :open="open" @update:open="$emit('update:open', $event)">
+        <AlertDialogContent>
+            <AlertDialogHeader>
+                <AlertDialogTitle>Remove timesheet row?</AlertDialogTitle>
+                <AlertDialogDescription>
+                    This will delete {{ entryCount }} time
+                    {{ entryCount === 1 ? 'entry' : 'entries' }}
+                    for "{{ projectName }}". This action cannot be undone.
+                </AlertDialogDescription>
+            </AlertDialogHeader>
+            <AlertDialogFooter>
+                <AlertDialogCancel>Cancel</AlertDialogCancel>
+                <AlertDialogAction
+                    class="bg-destructive text-destructive-foreground hover:bg-destructive/90"
+                    @click="$emit('confirm')">
+                    Delete
+                </AlertDialogAction>
+            </AlertDialogFooter>
+        </AlertDialogContent>
+    </AlertDialog>
+</template>

resources/js/Components/Timesheet/TimesheetCell.test.ts

@@ -0,0 +1,65 @@
+import { describe, expect, it } from 'vitest';
+import { mount } from '@vue/test-utils';
+import { nextTick } from 'vue';
+import TimesheetCell from './TimesheetCell.vue';
+import { formatHumanReadableDuration } from '@/packages/ui/src/utils/time';
+import type { TimesheetCell as TimesheetCellType } from '@/utils/useTimesheetGrid';
+
+function buildCell(totalSeconds: number): TimesheetCellType {
+    return {
+        dayIndex: 0,
+        date: '2026-04-13',
+        entries: [],
+        totalSeconds,
+    };
+}
+
+function mountTimesheetCell(totalSeconds = 2 * 3600) {
+    return mount(TimesheetCell, {
+        props: {
+            cell: buildCell(totalSeconds),
+            dayIndex: 0,
+            date: '2026-04-13',
+            isToday: false,
+            hasRunningEntry: false,
+        },
+    });
+}
+
+describe('TimesheetCell', () => {
+    it('emits 0 when the cleared value is committed on blur', async () => {
+        const wrapper = mountTimesheetCell();
+        const input = wrapper.get('input');
+
+        await input.trigger('focus');
+        await input.setValue('');
+        await input.trigger('blur');
+
+        expect(wrapper.emitted('update')).toEqual([[0]]);
+    });
+
+    it('emits 0 when the cleared value is committed with Enter', async () => {
+        const wrapper = mountTimesheetCell();
+        const input = wrapper.get('input');
+
+        await input.trigger('focus');
+        await input.setValue('');
+        await input.trigger('keydown', { key: 'Enter' });
+
+        expect(wrapper.emitted('update')).toEqual([[0]]);
+    });
+
+    it('restores the previous value and emits nothing on Escape', async () => {
+        const wrapper = mountTimesheetCell();
+        const input = wrapper.get('input');
+        const previousValue = formatHumanReadableDuration(2 * 3600, 'hours-minutes', 'point');
+
+        await input.trigger('focus');
+        await input.setValue('');
+        await input.trigger('keydown', { key: 'Escape' });
+        await nextTick();
+
+        expect(wrapper.emitted('update')).toBeUndefined();
+        expect((input.element as HTMLInputElement).value).toBe(previousValue);
+    });
+});

resources/js/Components/Timesheet/TimesheetCell.vue

@@ -0,0 +1,63 @@
+<script setup lang="ts">
+import DurationSecondsInput from '@/packages/ui/src/Input/DurationSecondsInput.vue';
+import {
+    Tooltip,
+    TooltipContent,
+    TooltipProvider,
+    TooltipTrigger,
+} from '@/packages/ui/src/tooltip';
+import type { TimesheetCell } from '@/utils/useTimesheetGrid';
+
+defineProps<{
+    cell?: TimesheetCell;
+    dayIndex: number;
+    date: string;
+    isToday: boolean;
+    hasRunningEntry: boolean;
+}>();
+
+const emit = defineEmits<{
+    update: [newSeconds: number];
+}>();
+</script>
+
+<template>
+    <div
+        data-testid="timesheet_cell"
+        class="flex items-center justify-center border-t border-default-background-separator"
+        :class="{ 'bg-default-background': isToday }">
+        <TooltipProvider v-if="hasRunningEntry" :delay-duration="100">
+            <Tooltip>
+                <TooltipTrigger as-child>
+                    <span class="inline-block cursor-not-allowed">
+                        <DurationSecondsInput
+                            :model-value="cell?.totalSeconds ?? 0"
+                            disabled
+                            default-unit="hours"
+                            placeholder="-"
+                            size="sm"
+                            input-class="w-[80px] mx-auto text-center font-medium
+                                bg-transparent text-text-primary placeholder:text-text-quaternary
+                                rounded-lg border border-input-border shadow-none
+                                pointer-events-none
+                                disabled:opacity-50 disabled:cursor-not-allowed" />
+                    </span>
+                </TooltipTrigger>
+                <TooltipContent> Stop the running time entry to edit the timesheet </TooltipContent>
+            </Tooltip>
+        </TooltipProvider>
+        <DurationSecondsInput
+            v-else
+            :model-value="cell?.totalSeconds ?? 0"
+            default-unit="hours"
+            placeholder="-"
+            size="sm"
+            input-class="w-[80px] mx-auto text-center font-medium
+                bg-transparent text-text-primary placeholder:text-text-quaternary
+                rounded-lg border border-input-border shadow-none
+                hover:bg-card-background
+                focus-visible:bg-tertiary focus-visible:border-transparent
+                focus-visible:ring-2 focus-visible:ring-ring focus-visible:outline-none"
+            @commit="(seconds) => emit('update', seconds ?? 0)" />
+    </div>
+</template>

resources/js/Components/Timesheet/TimesheetFooterActions.vue

@@ -0,0 +1,48 @@
+<script setup lang="ts">
+import { Button } from '@/packages/ui/src/Buttons';
+import {
+    DropdownMenu,
+    DropdownMenuContent,
+    DropdownMenuItem,
+    DropdownMenuTrigger,
+} from '@/packages/ui/src/dropdown-menu';
+import LoadingSpinner from '@/packages/ui/src/LoadingSpinner.vue';
+import { ChevronDownIcon, ClockIcon, ListBulletIcon } from '@heroicons/vue/20/solid';
+
+defineProps<{
+    busy: boolean;
+}>();
+
+defineEmits<{
+    (e: 'copy-rows'): void;
+    (e: 'copy-with-time'): void;
+}>();
+</script>
+
+<template>
+    <div class="mt-2 flex items-center pl-4 pr-4">
+        <DropdownMenu>
+            <DropdownMenuTrigger as-child>
+                <Button variant="ghost" size="sm" :disabled="busy">
+                    <LoadingSpinner v-if="busy" class="h-3.5 w-3.5 m-0" />
+                    Copy last week
+                    <ChevronDownIcon v-if="!busy" class="h-3.5 w-3.5 ml-1 text-icon-default" />
+                </Button>
+            </DropdownMenuTrigger>
+            <DropdownMenuContent align="start" class="min-w-[220px]">
+                <DropdownMenuItem
+                    class="flex items-center space-x-3 cursor-pointer"
+                    @click="$emit('copy-rows')">
+                    <ListBulletIcon class="w-5 text-icon-default" />
+                    <span>Copy rows only</span>
+                </DropdownMenuItem>
+                <DropdownMenuItem
+                    class="flex items-center space-x-3 cursor-pointer"
+                    @click="$emit('copy-with-time')">
+                    <ClockIcon class="w-5 text-icon-default" />
+                    <span>Copy rows and time entries</span>
+                </DropdownMenuItem>
+            </DropdownMenuContent>
+        </DropdownMenu>
+    </div>
+</template>

resources/js/Components/Timesheet/TimesheetGrid.vue

@@ -0,0 +1,166 @@
+<script setup lang="ts">
+import { inject, type ComputedRef } from 'vue';
+import { Button } from '@/packages/ui/src/Buttons';
+import { PlusIcon } from '@heroicons/vue/20/solid';
+import TimesheetRow from '@/Components/Timesheet/TimesheetRow.vue';
+import TimeTrackerProjectTaskDropdown from '@/packages/ui/src/TimeTracker/TimeTrackerProjectTaskDropdown.vue';
+import { getDayJsInstance } from '@/packages/ui/src/utils/time';
+import type {
+    Client,
+    CreateClientBody,
+    CreateProjectBody,
+    Organization,
+    Project,
+    Tag,
+    Task,
+} from '@/packages/api/src';
+import type { TimesheetRow as TimesheetRowType, TimesheetRowKey } from '@/utils/useTimesheetGrid';
+
+const organization = inject<ComputedRef<Organization>>('organization');
+const dayjs = getDayJsInstance();
+
+defineProps<{
+    rows: TimesheetRowType[];
+    weekDays: string[];
+    todayDate: string;
+    dayTotals: number[];
+    weekTotalFormatted: string;
+    projects: Project[];
+    tasks: Task[];
+    clients: Client[];
+    tags: Tag[];
+    currency: string;
+    canCreateProject: boolean;
+    enableEstimatedTime: boolean;
+    createProject: (project: CreateProjectBody) => Promise<Project | undefined>;
+    createClient: (client: CreateClientBody) => Promise<Client | undefined>;
+    createTag: (name: string) => Promise<Tag | undefined>;
+    formatDuration: (seconds: number) => string;
+}>();
+
+const emit = defineEmits<{
+    (e: 'remove-row', key: TimesheetRowKey): void;
+    (e: 'cell-update', row: TimesheetRowType, dayIndex: number, seconds: number): void;
+    (
+        e: 'project-task-change',
+        row: TimesheetRowType,
+        projectId: string | null,
+        taskId: string | null
+    ): void;
+    (e: 'billable-change', row: TimesheetRowType, billable: boolean): void;
+    (e: 'tags-change', row: TimesheetRowType, tags: string[]): void;
+    (e: 'add-row', projectId: string | null, taskId: string | null): void;
+}>();
+</script>
+
+<template>
+    <div class="flow-root max-w-[100vw] overflow-x-auto">
+        <div class="inline-block min-w-full align-middle">
+            <div
+                class="grid min-w-full w-max border-y border-default-background-separator"
+                style="
+                    grid-template-columns:
+                        minmax(420px, 1fr) repeat(7, minmax(96px, 120px)) minmax(100px, auto)
+                        40px;
+                ">
+                <!-- Header row -->
+                <div
+                    class="bg-background dark:bg-secondary pl-7 pr-3 py-1 text-xs text-text-tertiary md:sticky md:left-0 md:z-10">
+                    Project
+                </div>
+                <div
+                    v-for="day in weekDays"
+                    :key="day"
+                    class="bg-background dark:bg-secondary px-2 py-1 text-center">
+                    <div class="text-xs font-medium text-text-secondary">
+                        {{ dayjs(day).format('ddd D') }}
+                    </div>
+                </div>
+                <div
+                    class="bg-background dark:bg-secondary pl-3 pr-3 py-1 text-right text-xs text-text-tertiary">
+                    Total
+                </div>
+                <div class="bg-background dark:bg-secondary"></div>
+
+                <!-- Data rows -->
+                <TimesheetRow
+                    v-for="row in rows"
+                    :key="row.key"
+                    :row="row"
+                    :week-days="weekDays"
+                    :today-date="todayDate"
+                    :projects="projects"
+                    :tasks="tasks"
+                    :clients="clients"
+                    :tags="tags"
+                    :currency="currency"
+                    :can-create-project="canCreateProject"
+                    :enable-estimated-time="enableEstimatedTime"
+                    :create-project="createProject"
+                    :create-client="createClient"
+                    :create-tag="createTag"
+                    :format-duration="formatDuration"
+                    @remove-row="$emit('remove-row', $event)"
+                    @cell-update="
+                        (dayIndex, seconds) => $emit('cell-update', row, dayIndex, seconds)
+                    "
+                    @project-task-change="(pId, tId) => $emit('project-task-change', row, pId, tId)"
+                    @billable-change="(billable) => $emit('billable-change', row, billable)"
+                    @tags-change="(t) => $emit('tags-change', row, t)" />
+
+                <!-- Add row -->
+                <div
+                    class="col-span-full flex items-center gap-2 border-t border-default-background-separator pl-4 pr-4 py-2">
+                    <TimeTrackerProjectTaskDropdown
+                        :project="null"
+                        :task="null"
+                        :projects="projects"
+                        :tasks="tasks"
+                        :clients="clients"
+                        :currency="currency"
+                        :can-create-project="canCreateProject"
+                        :enable-estimated-time="enableEstimatedTime"
+                        :create-project="createProject"
+                        :create-client="createClient"
+                        :organization-billable-rate="organization?.billable_rate ?? null"
+                        :no-project-value="null"
+                        align="start"
+                        @changed="(p, t) => emit('add-row', p, t)">
+                        <template #trigger>
+                            <Button variant="ghost" size="sm" class="text-text-secondary">
+                                <PlusIcon class="h-4 w-4 mr-1 text-icon-default" />
+                                Add row
+                            </Button>
+                        </template>
+                    </TimeTrackerProjectTaskDropdown>
+                </div>
+
+                <!-- Totals row -->
+                <div
+                    class="border-t border-default-background-separator bg-background dark:bg-secondary pl-7 pr-3 py-1 text-xs text-text-tertiary md:sticky md:left-0 md:z-10">
+                    Total
+                </div>
+                <div
+                    v-for="(total, dayIndex) in dayTotals"
+                    :key="dayIndex"
+                    data-testid="timesheet_day_total"
+                    :class="[
+                        'flex items-center justify-center border-t border-default-background-separator bg-background dark:bg-secondary px-2 py-1 text-xs font-medium',
+                        weekDays[dayIndex] === todayDate
+                            ? 'text-text-primary'
+                            : 'text-text-secondary',
+                    ]">
+                    <span class="w-[80px] text-center">
+                        {{ total > 0 ? formatDuration(total) : '-' }}
+                    </span>
+                </div>
+                <div
+                    class="flex items-center justify-end border-t border-default-background-separator bg-background dark:bg-secondary pl-3 pr-3 py-1 text-xs font-semibold text-text-primary">
+                    {{ weekTotalFormatted }}
+                </div>
+                <div
+                    class="border-t border-default-background-separator bg-background dark:bg-secondary"></div>
+            </div>
+        </div>
+    </div>
+</template>

resources/js/Components/Timesheet/TimesheetHeader.vue

@@ -0,0 +1,60 @@
+<script setup lang="ts">
+import { Button } from '@/packages/ui/src/Buttons';
+import { ChevronLeftIcon, ChevronRightIcon, CalendarIcon } from '@heroicons/vue/20/solid';
+
+defineProps<{
+    isCurrentWeek: boolean;
+    weekNumber: number;
+    weekRangeDisplay: string;
+    weekTotalFormatted: string;
+}>();
+
+defineEmits<{
+    (e: 'previous'): void;
+    (e: 'next'): void;
+    (e: 'current'): void;
+}>();
+</script>
+
+<template>
+    <div class="flex flex-wrap items-center justify-between gap-4 mb-4 px-2 sm:px-4 lg:px-6">
+        <!-- Left: Week navigation -->
+        <div class="flex items-center gap-2">
+            <Button
+                variant="outline"
+                size="icon"
+                class="h-8 w-8"
+                data-testid="timesheet_prev_week"
+                @click="$emit('previous')">
+                <ChevronLeftIcon class="h-4 w-4" />
+            </Button>
+            <button
+                data-testid="timesheet_week_display"
+                class="flex items-center gap-2 px-3 py-1.5 text-sm font-medium text-text-primary hover:bg-card-background rounded-md transition"
+                @click="$emit('current')">
+                <CalendarIcon class="h-4 w-4 text-icon-default" />
+                <span v-if="isCurrentWeek">This week</span>
+                <span v-else>{{ weekRangeDisplay }}</span>
+                <span class="text-text-tertiary">&middot; W{{ weekNumber }}</span>
+            </button>
+            <Button
+                variant="outline"
+                size="icon"
+                class="h-8 w-8"
+                data-testid="timesheet_next_week"
+                @click="$emit('next')">
+                <ChevronRightIcon class="h-4 w-4" />
+            </Button>
+        </div>
+
+        <!-- Right: Week total -->
+        <div class="flex items-center gap-2.5">
+            <span class="text-xs text-text-tertiary uppercase tracking-wider">Week Total</span>
+            <span
+                data-testid="timesheet_grand_total"
+                class="text-sm font-semibold text-text-primary">
+                {{ weekTotalFormatted }}
+            </span>
+        </div>
+    </div>
+</template>

resources/js/Components/Timesheet/TimesheetRow.vue

@@ -0,0 +1,134 @@
+<script setup lang="ts">
+import { computed, inject, type ComputedRef } from 'vue';
+import { XMarkIcon } from '@heroicons/vue/16/solid';
+import TimesheetCell from './TimesheetCell.vue';
+import TimeTrackerProjectTaskDropdown from '@/packages/ui/src/TimeTracker/TimeTrackerProjectTaskDropdown.vue';
+import TimeEntryRowTagDropdown from '@/packages/ui/src/TimeEntry/TimeEntryRowTagDropdown.vue';
+import BillableToggleButton from '@/packages/ui/src/Input/BillableToggleButton.vue';
+import type {
+    CreateClientBody,
+    CreateProjectBody,
+    Project,
+    Task,
+    Client,
+    Tag,
+    Organization,
+} from '@/packages/api/src';
+import type { TimesheetRow, TimesheetRowKey } from '@/utils/useTimesheetGrid';
+import { Button } from '@/packages/ui/src/Buttons';
+
+const organization = inject<ComputedRef<Organization>>('organization');
+
+const props = defineProps<{
+    row: TimesheetRow;
+    weekDays: string[];
+    todayDate: string;
+    projects: Project[];
+    tasks: Task[];
+    clients: Client[];
+    tags: Tag[];
+    currency: string;
+    canCreateProject: boolean;
+    enableEstimatedTime: boolean;
+    createProject: (project: CreateProjectBody) => Promise<Project | undefined>;
+    createClient: (client: CreateClientBody) => Promise<Client | undefined>;
+    createTag: (name: string) => Promise<Tag | undefined>;
+    formatDuration: (seconds: number) => string;
+}>();
+
+const emit = defineEmits<{
+    removeRow: [key: TimesheetRowKey];
+    cellUpdate: [dayIndex: number, newSeconds: number];
+    projectTaskChange: [projectId: string | null, taskId: string | null];
+    billableChange: [billable: boolean];
+    tagsChange: [tags: string[]];
+}>();
+
+const selectedProject = computed({
+    get: () => props.row.projectId,
+    set: (val) => emit('projectTaskChange', val, selectedTask.value),
+});
+
+const selectedTask = computed({
+    get: () => props.row.taskId,
+    set: (val) => emit('projectTaskChange', selectedProject.value, val),
+});
+
+const rowTotalFormatted = computed(() => props.formatDuration(props.row.totalSeconds));
+
+function hasRunningEntry(dayIndex: number): boolean {
+    const cell = props.row.cells.get(dayIndex);
+    if (!cell) return false;
+    return cell.entries.some((e) => e.end === null);
+}
+</script>
+
+<template>
+    <div data-testid="timesheet_row" class="contents group">
+        <!-- Project/Task column -->
+        <div
+            class="flex items-center gap-1 border-t border-default-background-separator bg-default-background pl-4 pr-3 py-2 md:sticky md:left-0 md:z-10">
+            <div class="flex-1 min-w-0">
+                <TimeTrackerProjectTaskDropdown
+                    v-model:project="selectedProject"
+                    v-model:task="selectedTask"
+                    :projects="projects"
+                    :tasks="tasks"
+                    :clients="clients"
+                    :currency="currency"
+                    :can-create-project="canCreateProject"
+                    :enable-estimated-time="enableEstimatedTime"
+                    :create-project="createProject"
+                    :create-client="createClient"
+                    :organization-billable-rate="organization?.billable_rate ?? null"
+                    :no-project-value="null"
+                    variant="ghost"
+                    size="sm"
+                    class="w-full" />
+            </div>
+            <div class="flex items-center gap-1 flex-shrink-0 ml-auto">
+                <TimeEntryRowTagDropdown
+                    :create-tag="createTag"
+                    :tags="tags"
+                    :model-value="row.tags"
+                    @changed="emit('tagsChange', $event)" />
+                <BillableToggleButton
+                    :model-value="row.billable"
+                    size="small"
+                    faded
+                    @changed="emit('billableChange', $event)" />
+            </div>
+        </div>
+
+        <!-- Day cells -->
+        <TimesheetCell
+            v-for="(day, dayIndex) in weekDays"
+            :key="day"
+            :cell="row.cells.get(dayIndex)"
+            :day-index="dayIndex"
+            :date="day"
+            :is-today="day === todayDate"
+            :has-running-entry="hasRunningEntry(dayIndex)"
+            @update="(seconds) => emit('cellUpdate', dayIndex, seconds)" />
+
+        <!-- Row total -->
+        <div
+            data-testid="timesheet_row_total"
+            class="flex items-center justify-end border-t border-default-background-separator pl-3 pr-3 py-3 text-sm font-medium text-text-primary">
+            {{ rowTotalFormatted }}
+        </div>
+
+        <!-- Remove action -->
+        <div
+            class="flex items-center justify-center border-t border-default-background-separator pr-4 py-3">
+            <Button
+                variant="ghost"
+                size="icon"
+                aria-label="Remove row"
+                class="h-6 w-6 flex-shrink-0 opacity-0 group-hover:opacity-100 transition-opacity"
+                @click="emit('removeRow', row.key)">
+                <XMarkIcon class="h-3.5 w-3.5 text-icon-default" />
+            </Button>
+        </div>
+    </div>
+</template>

resources/js/Components/ui/alert-dialog/AlertDialogAction.vue

@@ -1,8 +1,8 @@
 <script setup lang="ts">
 import { buttonVariants } from '@/packages/ui/src';
+import { cn } from '@/lib/utils';
 import { AlertDialogAction, type AlertDialogActionProps } from 'reka-ui';
 import { computed, type HTMLAttributes } from 'vue';
-import { twMerge } from 'tailwind-merge';
 const props = defineProps<AlertDialogActionProps & { class?: HTMLAttributes['class'] }>();
 
 const delegatedProps = computed(() => {
@@ -13,7 +13,7 @@ const delegatedProps = computed(() => {
 </script>
 
 <template>
-    <AlertDialogAction v-bind="delegatedProps" :class="twMerge(buttonVariants(), props.class)">
+    <AlertDialogAction v-bind="delegatedProps" :class="cn(buttonVariants(), props.class)">
         <slot />
     </AlertDialogAction>
 </template>

resources/js/Components/ui/alert-dialog/AlertDialogCancel.vue

@@ -1,8 +1,8 @@
 <script setup lang="ts">
 import { buttonVariants } from '@/packages/ui/src';
+import { cn } from '@/lib/utils';
 import { AlertDialogCancel, type AlertDialogCancelProps } from 'reka-ui';
 import { computed, type HTMLAttributes } from 'vue';
-import { twMerge } from 'tailwind-merge';
 
 const props = defineProps<AlertDialogCancelProps & { class?: HTMLAttributes['class'] }>();
 
@@ -16,7 +16,7 @@ const delegatedProps = computed(() => {
 <template>
     <AlertDialogCancel
         v-bind="delegatedProps"
-        :class="twMerge(buttonVariants({ variant: 'outline' }), 'mt-2 sm:mt-0', props.class)">
+        :class="cn(buttonVariants({ variant: 'outline' }), 'mt-2 sm:mt-0', props.class)">
         <slot />
     </AlertDialogCancel>
 </template>

resources/js/Layouts/AppLayout.vue

@@ -17,6 +17,7 @@ import {
     UserGroupIcon,
     XMarkIcon,
     DocumentTextIcon,
+    TableCellsIcon,
 } from '@heroicons/vue/20/solid';
 import { PanelLeft } from 'lucide-vue-next';
 import NavigationSidebarItem from '@/Components/NavigationSidebarItem.vue';
@@ -135,7 +136,7 @@ const page = usePage<{
                     ? 'max-lg:translate-x-0 max-lg:shadow-xl'
                     : 'max-lg:-translate-x-full',
             ]"
-            class="flex-shrink-0 h-screen fixed w-[280px] px-2.5 py-4 hidden lg:flex flex-col justify-between bg-background border-r border-default-background-separator max-lg:z-50 max-lg:transition-transform max-lg:duration-200 max-lg:ease-in-out lg:w-[230px] 2xl:w-[250px] 2xl:px-3 lg:border-r-0"
+            class="flex-shrink-0 h-screen fixed w-[280px] px-2.5 py-4 hidden lg:flex flex-col justify-between bg-background border-r border-default-background-separator max-lg:z-50 max-lg:transition-transform max-lg:duration-200 max-lg:ease-in-out lg:w-[230px] lg:border-r-0"
             :style="showSidebarMenu ? { display: 'flex' } : undefined">
             <div class="flex flex-col h-full">
                 <div
@@ -185,6 +186,11 @@ const page = usePage<{
                                 :icon="CalendarIcon"
                                 :current="route().current('calendar')"
                                 :href="route('calendar')"></NavigationSidebarItem>
+                            <NavigationSidebarItem
+                                title="Timesheet"
+                                :icon="TableCellsIcon"
+                                :current="route().current('timesheet')"
+                                :href="route('timesheet')"></NavigationSidebarItem>
                             <NavigationSidebarItem
                                 title="Reporting"
                                 :icon="ChartBarIcon"
@@ -308,7 +314,7 @@ const page = usePage<{
                 </div>
             </div>
         </div>
-        <div class="flex-1 lg:ml-[230px] 2xl:ml-[250px] min-w-0">
+        <div class="flex-1 lg:ml-[230px] min-w-0">
             <div
                 class="h-screen overflow-y-auto flex flex-col bg-default-background border-l border-default-background-separator">
                 <div

resources/js/Pages/Calendar.vue

@@ -3,6 +3,7 @@ import AppLayout from '@/Layouts/AppLayout.vue';
 import { useTimeEntriesCalendarQuery } from '@/utils/useTimeEntriesCalendarQuery';
 import { useTimeEntriesMutations } from '@/utils/useTimeEntriesMutations';
 import { computed, ref, onMounted } from 'vue';
+import type { Dayjs } from 'dayjs';
 import { useQueryClient } from '@tanstack/vue-query';
 import {
     type Client,
@@ -27,8 +28,8 @@ import { useOrganizationQuery } from '@/utils/useOrganizationQuery';
 import { getCurrentOrganizationId } from '@/utils/useUser';
 
 const { organization } = useOrganizationQuery(getCurrentOrganizationId()!);
-const calendarStart = ref<Date | undefined>(undefined);
-const calendarEnd = ref<Date | undefined>(undefined);
+const calendarStart = ref<Dayjs | undefined>(undefined);
+const calendarEnd = ref<Dayjs | undefined>(undefined);
 
 // Test-injectable activity periods (for E2E testing).
 // These hooks are no-ops in production — they only take effect when test code
@@ -99,7 +100,7 @@ const { tags } = useTagsQuery();
 
 const queryClient = useQueryClient();
 
-function onDatesChange({ start, end }: { start: Date; end: Date }) {
+function onDatesChange({ start, end }: { start: Dayjs; end: Dayjs }) {
     calendarStart.value = start;
     calendarEnd.value = end;
 }

resources/js/Pages/Profile/Partials/ThemeForm.vue

@@ -2,8 +2,10 @@
 import FormSection from '@/Components/FormSection.vue';
 import { Field, FieldLabel, FieldDescription } from '@/packages/ui/src/field';
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/packages/ui/src';
+import { Checkbox } from '@/packages/ui/src';
 import { usePreferredColorScheme } from '@vueuse/core';
 import { themeSetting } from '@/utils/theme';
+import { groupSimilarTimeEntriesSetting } from '@/utils/timeEntryGrouping';
 
 const preferredColor = usePreferredColorScheme();
 </script>
@@ -15,6 +17,7 @@ const preferredColor = usePreferredColorScheme();
         <template #description> Choose how you want solidtime to look on your device </template>
 
         <template #form>
+            <!-- Theme -->
             <Field class="col-span-6 sm:col-span-4">
                 <FieldLabel for="theme">Theme</FieldLabel>
                 <Select id="theme" v-model="themeSetting">
@@ -31,6 +34,14 @@ const preferredColor = usePreferredColorScheme();
                     System default: {{ preferredColor }}
                 </FieldDescription>
             </Field>
+
+            <!-- Group similar time entries -->
+            <Field class="col-span-6 sm:col-span-4" orientation="horizontal">
+                <Checkbox
+                    id="group_similar_time_entries"
+                    v-model:checked="groupSimilarTimeEntriesSetting" />
+                <FieldLabel for="group_similar_time_entries">Group similar time entries</FieldLabel>
+            </Field>
         </template>
     </FormSection>
 </template>

resources/js/Pages/ReportingDetailed.vue

@@ -390,6 +390,7 @@ async function downloadExport(format: ExportFormat) {
                     :organization-billable-rate="organization?.billable_rate ?? null"
                     :duplicate-time-entry="() => createTimeEntry(entry)"
                     :members="members"
+                    is-report
                     show-date
                     show-member
                     :time-entry="entry"

resources/js/Pages/SharedReport.vue

@@ -3,7 +3,7 @@ import MainContainer from '@/packages/ui/src/MainContainer.vue';
 import PageTitle from '@/Components/Common/PageTitle.vue';
 import { ChartBarIcon } from '@heroicons/vue/20/solid';
 import ReportingChart from '@/Components/Common/Reporting/ReportingChart.vue';
-import { formatHumanReadableDuration } from '@/packages/ui/src/utils/time';
+import { formatReportingDuration } from '@/packages/ui/src/utils/time';
 import ReportingRow from '@/Components/Common/Reporting/ReportingRow.vue';
 import ReportingPieChart from '@/Components/Common/Reporting/ReportingPieChart.vue';
 import { formatCents } from '@/packages/ui/src/utils/money';
@@ -231,7 +231,7 @@ onMounted(async () => {
                                 </div>
                                 <div class="justify-end flex items-center font-medium">
                                     {{
-                                        formatHumanReadableDuration(
+                                        formatReportingDuration(
                                             aggregatedTableTimeEntries.seconds,
                                             reportIntervalFormat,
                                             reportNumberFormat

resources/js/Pages/Teams/Partials/OrganizationFormatSettings.vue

@@ -1,8 +1,8 @@
 <script setup lang="ts">
 import FormSection from '@/Components/FormSection.vue';
 import PrimaryButton from '@/packages/ui/src/Buttons/PrimaryButton.vue';
-import { onMounted, ref } from 'vue';
-import { Field, FieldLabel } from '@/packages/ui/src/field';
+import { computed, onMounted, ref } from 'vue';
+import { Field, FieldDescription, FieldLabel } from '@/packages/ui/src/field';
 import type { UpdateOrganizationBody } from '@/packages/api/src';
 import { useOrganizationStore } from '@/utils/useOrganization';
 import { storeToRefs } from 'pinia';
@@ -52,6 +52,12 @@ onMounted(async () => {
     }
 });
 
+const showsHhMmSsInReports = computed(
+    () =>
+        form.value.interval_format === 'hours-minutes' ||
+        form.value.interval_format === 'hours-minutes-colon-separated'
+);
+
 async function submit() {
     mutation.mutate(form.value);
 }
@@ -149,6 +155,12 @@ async function submit() {
                         >
                     </SelectContent>
                 </Select>
+                <FieldDescription v-if="showsHhMmSsInReports">
+                    Reports and totals shown next to cost use HH:MM:SS for this format, so the
+                    duration reconciles with the billable amount down to the second. Everywhere else
+                    (time tracker, calendar, entry rows) seconds are omitted and durations stay in
+                    your chosen format.
+                </FieldDescription>
             </Field>
         </template>
 

resources/js/Pages/Time.vue

@@ -16,6 +16,7 @@ import { useElementVisibility } from '@vueuse/core';
 import { ClockIcon } from '@heroicons/vue/20/solid';
 import LoadingSpinner from '@/packages/ui/src/LoadingSpinner.vue';
 import { useCurrentTimeEntryStore } from '@/utils/useCurrentTimeEntry';
+import { groupSimilarTimeEntriesSetting } from '@/utils/timeEntryGrouping';
 import { useTasksQuery } from '@/utils/useTasksQuery';
 import { useProjectsQuery } from '@/utils/useProjectsQuery';
 import TimeEntryGroupedTable from '@/packages/ui/src/TimeEntry/TimeEntryGroupedTable.vue';
@@ -151,6 +152,7 @@ function deleteSelected() {
             :tasks="tasks"
             :currency="getOrganizationCurrencyString()"
             :time-entries="timeEntries"
+            :group-similar-time-entries="groupSimilarTimeEntriesSetting"
             :tags="tags"></TimeEntryGroupedTable>
         <div v-if="isPending" class="flex justify-center items-center py-12">
             <LoadingSpinner></LoadingSpinner>

resources/js/Pages/Timesheet.vue

@@ -0,0 +1,196 @@
+<script setup lang="ts">
+import { computed, watch } from 'vue';
+import { storeToRefs } from 'pinia';
+import AppLayout from '@/Layouts/AppLayout.vue';
+import LoadingSpinner from '@/packages/ui/src/LoadingSpinner.vue';
+import TimesheetHeader from '@/Components/Timesheet/TimesheetHeader.vue';
+import TimesheetGrid from '@/Components/Timesheet/TimesheetGrid.vue';
+import TimesheetFooterActions from '@/Components/Timesheet/TimesheetFooterActions.vue';
+import RemoveRowDialog from '@/Components/Timesheet/RemoveRowDialog.vue';
+import { useTimesheetQuery } from '@/utils/useTimesheetQuery';
+import { useTimesheetGrid } from '@/utils/useTimesheetGrid';
+import { useTimeEntriesMutations } from '@/utils/useTimeEntriesMutations';
+import { useProjectsQuery } from '@/utils/useProjectsQuery';
+import { useTasksQuery } from '@/utils/useTasksQuery';
+import { useClientsQuery } from '@/utils/useClientsQuery';
+import { useTagsQuery } from '@/utils/useTagsQuery';
+import { useOrganizationQuery } from '@/utils/useOrganizationQuery';
+import { useProjectsStore } from '@/utils/useProjects';
+import { useClientsStore } from '@/utils/useClients';
+import { useTagsStore } from '@/utils/useTags';
+import { getCurrentOrganizationId } from '@/utils/useUser';
+import { getOrganizationCurrencyString } from '@/utils/money';
+import { isAllowedToPerformPremiumAction } from '@/utils/billing';
+import { canCreateProjects } from '@/utils/permissions';
+import { formatHumanReadableDuration } from '@/packages/ui/src/utils/time';
+import { useTimesheetWeek } from '@/utils/timesheet/useTimesheetWeek';
+import { useTimesheetCellMutations } from '@/utils/timesheet/useTimesheetCellMutations';
+import { useTimesheetRowMutations } from '@/utils/timesheet/useTimesheetRowMutations';
+import { useTimesheetRowDeletion } from '@/utils/timesheet/useTimesheetRowDeletion';
+import { useCopyLastWeek } from '@/utils/timesheet/useCopyLastWeek';
+import { useCurrentTimeEntryStore } from '@/utils/useCurrentTimeEntry';
+import type { CreateClientBody, CreateProjectBody, Project, Client, Tag } from '@/packages/api/src';
+
+// ── Week state ────────────────────────────────────────────────────
+const {
+    weekStart,
+    weekEnd,
+    weekDays,
+    weekNumber,
+    isCurrentWeek,
+    todayDate,
+    goToPreviousWeek,
+    goToNextWeek,
+    goToCurrentWeek,
+} = useTimesheetWeek();
+
+// ── Data fetching ─────────────────────────────────────────────────
+const { data, isPending } = useTimesheetQuery(weekStart, weekEnd);
+const timeEntries = computed(() => data.value?.data ?? []);
+
+const { projects } = useProjectsQuery();
+const { tasks } = useTasksQuery();
+const { clients } = useClientsQuery();
+const { tags } = useTagsQuery();
+const { now: currentTimerNow } = storeToRefs(useCurrentTimeEntryStore());
+
+const mutations = useTimeEntriesMutations();
+
+// ── Grid computation ──────────────────────────────────────────────
+const { rows, dayTotals, grandTotal, addSlot, removeSlot, updateSlot, clearSlots } =
+    useTimesheetGrid(timeEntries, weekDays, projects, tasks, currentTimerNow);
+
+// Wipe slots on week navigation so the new week starts fresh — the
+// grid's watcher will reseed from the newly fetched entries.
+watch(weekStart, () => clearSlots());
+
+// ── Formatters ────────────────────────────────────────────────────
+// Pull number/interval format off the org via its query rather than
+// inject('organization'), which is undefined during the page's setup
+// (AppLayout provides it later in the lifecycle).
+const { organization } = useOrganizationQuery(getCurrentOrganizationId()!);
+const intervalFormat = computed(() => organization.value?.interval_format ?? 'hours-minutes');
+const numberFormat = computed(() => organization.value?.number_format ?? 'point');
+
+function formatDuration(seconds: number): string {
+    if (seconds === 0) return '-';
+    return formatHumanReadableDuration(seconds, intervalFormat.value, numberFormat.value);
+}
+
+const weekTotalFormatted = computed(() =>
+    formatHumanReadableDuration(grandTotal.value, intervalFormat.value, numberFormat.value)
+);
+
+const weekRangeDisplay = computed(() => {
+    const start = weekStart.value;
+    const end = start.add(6, 'day');
+    return start.month() === end.month()
+        ? `${start.format('MMM D')} - ${end.format('D')}`
+        : `${start.format('MMM D')} - ${end.format('MMM D')}`;
+});
+
+// ── Cell / row mutation handlers ──────────────────────────────────
+const { handleCellUpdate } = useTimesheetCellMutations(weekDays, timeEntries, rows, removeSlot);
+
+const { handleRowIdentityChange, handleAddRow } = useTimesheetRowMutations(
+    mutations,
+    projects,
+    rows,
+    addSlot,
+    updateSlot,
+    removeSlot
+);
+
+const {
+    showDeleteDialog,
+    deleteRowEntryCount,
+    deleteRowProjectName,
+    requestRemoveRow,
+    confirmDeleteRow,
+} = useTimesheetRowDeletion(projects, mutations, removeSlot);
+
+function handleRemoveRow(key: string) {
+    const row = rows.value.find((r) => r.key === key);
+    if (row) requestRemoveRow(row);
+}
+
+// ── Copy last week ────────────────────────────────────────────────
+const { isCopyingLastWeek, copyLastWeekRows, copyLastWeekWithTime } = useCopyLastWeek(
+    weekStart,
+    weekDays,
+    rows,
+    timeEntries,
+    addSlot
+);
+
+// ── Inline creation helpers (passed to TimesheetRow) ──────────────
+async function createProject(project: CreateProjectBody): Promise<Project | undefined> {
+    return await useProjectsStore().createProject(project);
+}
+
+async function createClient(body: CreateClientBody): Promise<Client | undefined> {
+    return await useClientsStore().createClient(body);
+}
+
+async function createTag(name: string): Promise<Tag | undefined> {
+    return await useTagsStore().createTag(name);
+}
+</script>
+
+<template>
+    <AppLayout title="Timesheet" data-testid="timesheet_view">
+        <div class="pt-5 lg:pt-8 pb-4 lg:pb-6">
+            <TimesheetHeader
+                :is-current-week="isCurrentWeek"
+                :week-number="weekNumber"
+                :week-range-display="weekRangeDisplay"
+                :week-total-formatted="weekTotalFormatted"
+                @previous="goToPreviousWeek"
+                @next="goToNextWeek"
+                @current="goToCurrentWeek" />
+
+            <TimesheetGrid
+                v-if="!isPending"
+                :rows="rows"
+                :week-days="weekDays"
+                :today-date="todayDate"
+                :day-totals="dayTotals"
+                :week-total-formatted="weekTotalFormatted"
+                :projects="projects"
+                :tasks="tasks"
+                :clients="clients"
+                :tags="tags"
+                :currency="getOrganizationCurrencyString()"
+                :can-create-project="canCreateProjects()"
+                :enable-estimated-time="isAllowedToPerformPremiumAction()"
+                :create-project="createProject"
+                :create-client="createClient"
+                :create-tag="createTag"
+                :format-duration="formatDuration"
+                @remove-row="handleRemoveRow"
+                @cell-update="handleCellUpdate"
+                @project-task-change="
+                    (row, projectId, taskId) => handleRowIdentityChange(row, { projectId, taskId })
+                "
+                @billable-change="(row, billable) => handleRowIdentityChange(row, { billable })"
+                @tags-change="(row, tags) => handleRowIdentityChange(row, { tags })"
+                @add-row="handleAddRow" />
+
+            <TimesheetFooterActions
+                v-if="!isPending"
+                :busy="isCopyingLastWeek"
+                @copy-rows="copyLastWeekRows"
+                @copy-with-time="copyLastWeekWithTime" />
+
+            <div v-else class="flex justify-center items-center py-12">
+                <LoadingSpinner />
+            </div>
+        </div>
+
+        <RemoveRowDialog
+            v-model:open="showDeleteDialog"
+            :entry-count="deleteRowEntryCount"
+            :project-name="deleteRowProjectName"
+            @confirm="confirmDeleteRow" />
+    </AppLayout>
+</template>

resources/js/packages/ui/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@solidtime/ui",
-    "version": "0.0.17",
+    "version": "0.0.21",
     "description": "Package containing the solidtime ui components",
     "main": "./dist/solidtime-ui-lib.umd.cjs",
     "module": "./dist/solidtime-ui-lib.js",

resources/js/packages/ui/src/Buttons/SecondaryButton.vue

@@ -32,7 +32,7 @@ const sizeClasses = {
         :disabled="loading"
         :class="
             twMerge(
-                'bg-button-secondary-background border border-button-secondary-border hover:bg-button-secondary-background-hover shadow-sm transition text-text-primary rounded-lg font-semibold inline-flex items-center space-x-1.5 focus-visible:outline-none focus-visible:border-transparent focus-visible:ring-2 focus-visible:ring-ring focus:border-transparent disabled:opacity-25 ease-in-out',
+                'bg-button-secondary-background border border-button-secondary-border hover:bg-button-secondary-background-hover shadow-sm transition text-text-primary rounded-lg font-medium inline-flex items-center space-x-1.5 focus-visible:outline-none focus-visible:border-transparent focus-visible:ring-2 focus-visible:ring-ring focus:border-transparent disabled:opacity-25 ease-in-out',
                 sizeClasses[props.size],
                 props.class
             )

resources/js/packages/ui/src/FullCalendar/CalendarDayColumn.vue

@@ -4,7 +4,7 @@ import { Tooltip, TooltipContent, TooltipProvider, TooltipTrigger } from '..';
 import type { DayEvent, ActivityBox } from './calendarTypes';
 import type { WindowActivityInPeriod } from './activityTypes';
 
-defineProps<{
+const props = defineProps<{
     dayStr: string;
     totalGridHeight: number;
     hasActivityStatus: boolean;
@@ -34,6 +34,8 @@ defineProps<{
     getActivityBoxActivities: (box: ActivityBox) => WindowActivityInPeriod[];
     getActivityPercentage: (count: number, total: number) => string;
     getActivityText: (activity: WindowActivityInPeriod) => string;
+    getTopActivity: (box: ActivityBox) => WindowActivityInPeriod | null;
+    isDayView: boolean;
 
     // Selection
     showSelection: boolean;
@@ -46,6 +48,16 @@ defineProps<{
     selectionEndHeight: number;
 }>();
 
+function isUncoveredByEvents(abox: ActivityBox): boolean {
+    return !props.dayEvents.some((de) => {
+        const eTop = de.top;
+        const eBottom = de.top + de.height;
+        const aTop = abox.top;
+        const aBottom = abox.top + abox.height;
+        return eTop < aBottom && eBottom > aTop;
+    });
+}
+
 const emit = defineEmits<{
     (e: 'event-pointerdown', event: PointerEvent, dayEvent: DayEvent): void;
     (e: 'event-keydown-enter', dayEvent: DayEvent): void;
@@ -55,6 +67,7 @@ const emit = defineEmits<{
         dayEvent: DayEvent,
         edge: 'start' | 'end'
     ): void;
+    (e: 'activity-pointerdown', event: PointerEvent): void;
 }>();
 </script>
 
@@ -63,16 +76,20 @@ const emit = defineEmits<{
         class="fc-timegrid-col relative border-r border-border bg-transparent pointer-events-none"
         :class="{
             'has-activity-status': hasActivityStatus,
+            'activity-expanded': hasActivityStatus && isDayView,
         }"
         :data-date="dayStr"
         :style="{ height: totalGridHeight + 'px' }">
         <div
             class="absolute inset-y-0 left-0.5 right-0.5"
-            :class="{ 'fc-events-inset': hasActivityStatus }">
+            :class="{
+                'fc-events-inset': hasActivityStatus && !isDayView,
+                'fc-events-inset-expanded': hasActivityStatus && isDayView,
+            }">
             <div
                 v-for="dayEvent in dayEvents"
                 :key="dayEvent.event.id"
-                class="fc-event group pointer-events-auto rounded-sm text-xs cursor-pointer shadow-card overflow-hidden border border-border touch-none select-none hover:shadow-dropdown focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-1"
+                class="fc-event group pointer-events-auto rounded-sm text-xs cursor-pointer shadow-card border border-border touch-none select-none hover:shadow-dropdown focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-1"
                 :class="[
                     getEventOpacityClass(dayEvent, dayStr),
                     {
@@ -91,9 +108,7 @@ const emit = defineEmits<{
                 :aria-label="dayEvent.event.title"
                 role="button"
                 @pointerdown="emit('event-pointerdown', $event, dayEvent)"
-                @keydown.enter.prevent="
-                    !dayEvent.event.isRunning && emit('event-keydown-enter', dayEvent)
-                ">
+                @keydown.enter.prevent="emit('event-keydown-enter', dayEvent)">
                 <div
                     v-if="!dayEvent.isClippedStart"
                     class="fc-event-resizer fc-event-resizer-start absolute z-[99] w-full h-3 left-0 top-[-2px] cursor-row-resize flex items-center justify-center opacity-0 group-hover:opacity-100"
@@ -122,15 +137,47 @@ const emit = defineEmits<{
             class="fc-timegrid-now-indicator-line absolute left-0 right-0 border-t-2 border-red-500 z-50 pointer-events-none"
             :style="{ top: nowIndicatorTop + 'px' }"></div>
 
-        <TooltipProvider :delay-duration="0">
+        <TooltipProvider :disable-hoverable-content="true" :delay-duration="0">
             <Tooltip v-for="(abox, ai) in activityBoxes" :key="'activity-' + ai">
                 <TooltipTrigger as-child>
                     <div
                         class="activity-status-box"
-                        :class="abox.isIdle ? 'idle' : 'active'"
-                        :style="{ top: abox.top + 'px', height: abox.height + 'px' }"></div>
+                        :class="[
+                            abox.isIdle ? 'idle' : 'active',
+                            {
+                                'activity-status-box-expanded': isDayView,
+                                'activity-status-box-uncovered':
+                                    !isDayView &&
+                                    !abox.isIdle &&
+                                    getTopActivity(abox) &&
+                                    isUncoveredByEvents(abox),
+                            },
+                        ]"
+                        :style="{ top: abox.top + 'px', height: abox.height + 'px' }"
+                        @pointerdown="emit('activity-pointerdown', $event)">
+                        <div
+                            v-if="
+                                !abox.isIdle &&
+                                getTopActivity(abox) &&
+                                abox.height >= 16 &&
+                                (isDayView || isUncoveredByEvents(abox))
+                            "
+                            class="activity-status-content">
+                            <img
+                                v-if="getTopActivity(abox)?.icon"
+                                :src="getTopActivity(abox)!.icon!"
+                                :alt="getTopActivity(abox)!.appName"
+                                class="activity-status-icon" />
+                            <div v-else class="activity-status-icon-fallback">
+                                {{ getTopActivity(abox)!.appName.charAt(0).toUpperCase() }}
+                            </div>
+                            <span class="activity-status-label">
+                                {{ getTopActivity(abox)!.label || getTopActivity(abox)!.appName }}
+                            </span>
+                        </div>
+                    </div>
                 </TooltipTrigger>
-                <TooltipContent side="right" :side-offset="8">
+                <TooltipContent :side="isDayView ? 'right' : 'left'" :side-offset="8">
                     <template v-if="getActivityBoxActivities(abox).length === 0">
                         {{ getActivityBoxLabel(abox) }}
                     </template>
@@ -271,13 +318,99 @@ const emit = defineEmits<{
     background-color: rgba(156, 163, 175, 0.5);
 }
 .activity-status-box.active::before {
-    background-color: rgba(34, 197, 94, 0.3);
+    background-color: rgba(14, 165, 233, 0.3);
 }
 .activity-status-box.active:hover::before {
-    background-color: rgba(34, 197, 94, 1);
+    background-color: rgba(14, 165, 233, 1);
+}
+
+/* Uncovered activity boxes in week view — fill column width */
+.activity-status-box-uncovered {
+    width: calc(100% - 4px);
+    border-radius: 3px;
+    overflow: hidden;
+}
+.activity-status-box-uncovered::before {
+    left: 0;
+    right: 0;
+    width: auto;
+}
+.activity-status-box-uncovered.active::before {
+    background-color: rgba(14, 165, 233, 0.12);
+}
+.activity-status-box-uncovered.active:hover::before {
+    background-color: rgba(14, 165, 233, 0.25);
+}
+
+/* Expanded activity boxes for day view */
+.activity-status-box-expanded {
+    width: 200px;
+    border-radius: 3px;
+    overflow: hidden;
+}
+.activity-status-box-expanded::before {
+    left: 0;
+    right: 0;
+    width: auto;
+}
+.activity-status-box-expanded.idle::before {
+    background-color: rgba(156, 163, 175, 0.08);
+}
+.activity-status-box-expanded.idle:hover::before {
+    background-color: rgba(156, 163, 175, 0.2);
+}
+.activity-status-box-expanded.active::before {
+    background-color: rgba(14, 165, 233, 0.12);
+}
+.activity-status-box-expanded.active:hover::before {
+    background-color: rgba(14, 165, 233, 0.25);
+}
+
+.activity-status-content {
+    position: relative;
+    z-index: 1;
+    display: flex;
+    align-items: center;
+    gap: 4px;
+    padding: 2px 4px;
+    height: 100%;
+    overflow: hidden;
+}
+
+.activity-status-icon {
+    width: 14px;
+    height: 14px;
+    border-radius: 2px;
+    flex-shrink: 0;
+}
+
+.activity-status-icon-fallback {
+    width: 14px;
+    height: 14px;
+    border-radius: 2px;
+    background-color: rgba(14, 165, 233, 0.2);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    font-size: 8px;
+    flex-shrink: 0;
+    color: rgba(14, 165, 233, 0.8);
+}
+
+.activity-status-label {
+    font-size: 10px;
+    line-height: 1.2;
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    opacity: 0.8;
 }
 
 .fc-events-inset {
     left: 8px;
 }
+
+.fc-events-inset-expanded {
+    left: 204px;
+}
 </style>

resources/js/packages/ui/src/FullCalendar/CalendarToolbar.vue

@@ -22,7 +22,7 @@ const emit = defineEmits<{
 </script>
 
 <template>
-    <div class="flex items-center justify-between bg-background px-2 py-1.5">
+    <div class="flex items-center justify-between bg-default-background px-2 py-1.5">
         <!-- Left: Navigation -->
         <div class="flex items-center gap-1">
             <Button

resources/js/packages/ui/src/FullCalendar/TimeEntryCalendar.vue

@@ -57,7 +57,7 @@ import type {
 import type { Dayjs } from 'dayjs';
 
 const emit = defineEmits<{
-    (e: 'dates-change', payload: { start: Date; end: Date }): void;
+    (e: 'dates-change', payload: { start: Dayjs; end: Dayjs }): void;
     (e: 'refresh'): void;
 }>();
 
@@ -163,6 +163,7 @@ const {
     getActivityBoxActivities,
     getActivityPercentage,
     getActivityText,
+    getTopActivity,
 } = useActivityBoxes({
     activityPeriods: () => props.activityPeriods,
     viewDays,
@@ -280,6 +281,22 @@ watch(showEditTimeEntryModal, (value) => {
     }
 });
 
+/**
+ * Guards slot pointer-down so that clicks which dismiss an open Reka UI
+ * layer (context menu, popover, dialog) don't simultaneously start a
+ * new time-entry selection on the calendar grid.
+ *
+ * Because Reka's DismissableLayer registers its document-level
+ * `pointerdown` listener *without* capture, it fires AFTER the
+ * calendar grid's own handler. That means when this guard runs,
+ * `contextMenuOpen` (and modal refs) still reflect the *open* state.
+ */
+function guardedSlotPointerDown(e: PointerEvent) {
+    if (contextMenuOpen.value) return;
+    if (showCreateTimeEntryModal.value || showEditTimeEntryModal.value) return;
+    onSlotPointerDown(e);
+}
+
 const scrollToCurrentTime = () => {
     nextTick(() => {
         if (!scrollerRef.value) return;
@@ -314,6 +331,18 @@ watch(
     { deep: true }
 );
 
+let hasScrolledOnLoad = false;
+
+watch(
+    () => props.loading,
+    (loading) => {
+        if (!loading && !hasScrolledOnLoad) {
+            hasScrolledOnLoad = true;
+            scrollToCurrentTime();
+        }
+    }
+);
+
 onMounted(() => {
     scrollToCurrentTime();
     emitDatesChange();
@@ -465,7 +494,7 @@ function getEventDurationSeconds(dayEvent: DayEvent, dayStr: string): number {
                         <div
                             class="fc-header-scroll flex border-b border-border shrink-0 sticky top-0 z-10 bg-default-background">
                             <div
-                                class="shrink-0 bg-background border-r border-border"
+                                class="shrink-0 bg-default-background border-r border-border"
                                 :style="{
                                     width: TIME_AXIS_WIDTH + 'px',
                                     minWidth: TIME_AXIS_WIDTH + 'px',
@@ -478,7 +507,7 @@ function getEventDurationSeconds(dayEvent: DayEvent, dayStr: string): number {
                                 <div
                                     v-for="day in viewDays"
                                     :key="day.format('YYYY-MM-DD')"
-                                    class="fc-col-header-cell border-r border-b border-border px-2 py-3 bg-default-background text-center"
+                                    class="fc-col-header-cell border-r border-border px-2 py-3 bg-default-background text-center"
                                     :class="{
                                         'bg-secondary': isToday(day),
                                         'fc-day-today': isToday(day),
@@ -497,7 +526,7 @@ function getEventDurationSeconds(dayEvent: DayEvent, dayStr: string): number {
                         <div ref="scrollerRef" class="fc-scroller">
                             <div class="flex min-w-0">
                                 <div
-                                    class="shrink-0 bg-background border-r border-border"
+                                    class="shrink-0 bg-default-background border-r border-border"
                                     :style="{
                                         width: TIME_AXIS_WIDTH + 'px',
                                         minWidth: TIME_AXIS_WIDTH + 'px',
@@ -514,7 +543,7 @@ function getEventDurationSeconds(dayEvent: DayEvent, dayStr: string): number {
                                         :style="{ height: SLOT_HEIGHT + 'px' }">
                                         <span
                                             v-if="slot.isHour"
-                                            class="fc-timegrid-slot-label-cushion text-[0.8125rem] text-muted-foreground leading-none block">
+                                            class="fc-timegrid-slot-label-cushion text-[0.8125rem] text-muted-foreground leading-none block font-light">
                                             {{ formatSlotLabel(slot.minutes / 60) }}
                                         </span>
                                     </div>
@@ -522,14 +551,32 @@ function getEventDurationSeconds(dayEvent: DayEvent, dayStr: string): number {
 
                                 <div
                                     class="flex-1 min-w-0 relative"
-                                    @pointerdown="onSlotPointerDown($event)">
+                                    @pointerdown="guardedSlotPointerDown($event)">
                                     <div
-                                        class="bg-background"
+                                        class="bg-default-background relative"
                                         :style="{ height: totalGridHeight + 'px' }">
+                                        <div
+                                            class="absolute inset-0 grid"
+                                            :style="{
+                                                gridTemplateColumns:
+                                                    'repeat(' + viewDays.length + ', 1fr)',
+                                            }">
+                                            <div
+                                                v-for="day in viewDays"
+                                                :key="'bg-' + day.format('YYYY-MM-DD')"
+                                                :style="
+                                                    isToday(day)
+                                                        ? {
+                                                              backgroundColor:
+                                                                  'var(--theme-color-default-background)',
+                                                          }
+                                                        : undefined
+                                                " />
+                                        </div>
                                         <div
                                             v-for="slot in slots"
                                             :key="'lane-' + slot.time"
-                                            class="fc-timegrid-slot fc-timegrid-slot-lane border-t border-border box-border"
+                                            class="fc-timegrid-slot fc-timegrid-slot-lane border-t border-border box-border relative"
                                             :class="{
                                                 'fc-timegrid-slot-minor border-dotted':
                                                     !slot.isHour,
@@ -581,6 +628,8 @@ function getEventDurationSeconds(dayEvent: DayEvent, dayStr: string): number {
                                             :get-activity-box-activities="getActivityBoxActivities"
                                             :get-activity-percentage="getActivityPercentage"
                                             :get-activity-text="getActivityText"
+                                            :get-top-activity="getTopActivity"
+                                            :is-day-view="activeView === 'timeGridDay'"
                                             :show-selection="
                                                 isSelecting || showCreateTimeEntryModal
                                             "
@@ -599,6 +648,7 @@ function getEventDurationSeconds(dayEvent: DayEvent, dayStr: string): number {
                                             :selection-height="selectionHeight"
                                             :selection-end-top="selectionEndTop"
                                             :selection-end-height="selectionEndHeight"
+                                            @activity-pointerdown="guardedSlotPointerDown"
                                             @event-pointerdown="
                                                 (e, dayEvent) =>
                                                     onEventPointerDown(e, dayEvent.event, dayEvent)

resources/js/packages/ui/src/FullCalendar/activityTypes.ts

@@ -1,6 +1,6 @@
 export interface WindowActivityInPeriod {
     appName: string;
-    url: string | null;
+    label: string | null;
     count: number;
     icon?: string | null;
 }

resources/js/packages/ui/src/FullCalendar/useActivityBoxes.ts

@@ -12,19 +12,13 @@ export function useActivityBoxes(params: {
     calendarSettings: Ref<CalendarSettings>;
     minutesToPixels: (minutes: number) => number;
 }) {
-    function formatActivityDuration(durationMinutes: number): string {
-        const hours = Math.floor(durationMinutes / 60);
-        const minutes = durationMinutes % 60;
-        return hours > 0 ? `${hours}h ${minutes}m` : `${minutes}m`;
-    }
-
     function getActivityBoxLabel(box: ActivityBox): string {
         const periodStart = getLocalizedDayJs(box.period.start);
         const periodEnd = getLocalizedDayJs(box.period.end);
-        const durationMinutes = Math.round(periodEnd.diff(periodStart, 'minute', true));
-        const durationText = formatActivityDuration(durationMinutes);
+        const startText = periodStart.format('HH:mm');
+        const endText = periodEnd.format('HH:mm');
         const status = box.isIdle ? 'Idling' : 'Active';
-        return `${status} (${durationText})`;
+        return `${status} (${startText} - ${endText})`;
     }
 
     function getActivityBoxActivities(box: ActivityBox) {
@@ -37,7 +31,16 @@ export function useActivityBoxes(params: {
     }
 
     function getActivityText(activity: WindowActivityInPeriod): string {
-        return activity.url ? `${activity.appName} - ${activity.url}` : activity.appName;
+        return activity.label ? `${activity.appName} - ${activity.label}` : activity.appName;
+    }
+
+    function getTopActivity(box: ActivityBox): WindowActivityInPeriod | null {
+        const activities = box.period.windowActivities;
+        if (!activities || activities.length === 0) return null;
+        return activities.reduce<WindowActivityInPeriod>(
+            (top, a) => (a.count > top.count ? a : top),
+            activities[0]!
+        );
     }
 
     const activityBoxes = computed<ActivityBox[]>(() => {
@@ -99,5 +102,6 @@ export function useActivityBoxes(params: {
         getActivityBoxActivities,
         getActivityPercentage,
         getActivityText,
+        getTopActivity,
     };
 }

resources/js/packages/ui/src/FullCalendar/useCalendarEvents.ts

@@ -265,9 +265,9 @@ export function useCalendarEvents(params: {
                     'seconds'
                 );
             } else {
-                durationSeconds = params.currentTime.value.diff(
-                    getDayJsInstance()(entry.start),
-                    'seconds'
+                durationSeconds = Math.max(
+                    0,
+                    params.currentTime.value.diff(getDayJsInstance()(entry.start), 'seconds')
                 );
             }
 

resources/js/packages/ui/src/FullCalendar/useCalendarNavigation.ts

@@ -1,27 +1,17 @@
 import { computed, ref } from 'vue';
 import type { Dayjs } from 'dayjs';
 import { getLocalizedDayJs } from '../utils/time';
-import { getWeekStart } from '../utils/settings';
+import { getWeekStartDayNumber } from '../utils/settings';
 
 export function useCalendarNavigation(callbacks: {
-    onDatesChange: (payload: { start: Date; end: Date }) => void;
+    onDatesChange: (payload: { start: Dayjs; end: Dayjs }) => void;
     scrollToCurrentTime: () => void;
 }) {
     const activeView = ref('timeGridWeek');
     const currentDate = ref(getLocalizedDayJs());
 
     function getFirstDay(): number {
-        const weekStart = getWeekStart();
-        const weekStartMap: Record<string, number> = {
-            sunday: 0,
-            monday: 1,
-            tuesday: 2,
-            wednesday: 3,
-            thursday: 4,
-            friday: 5,
-            saturday: 6,
-        };
-        return weekStartMap[weekStart] ?? 1;
+        return getWeekStartDayNumber();
     }
 
     const viewDays = computed<Dayjs[]>(() => {
@@ -67,8 +57,8 @@ export function useCalendarNavigation(callbacks: {
         const days = viewDays.value;
         if (days.length === 0) return;
 
-        const start = days[0]!.toDate();
-        const end = days[days.length - 1]!.add(1, 'day').toDate();
+        const start = days[0]!;
+        const end = days[days.length - 1]!.add(1, 'day');
         callbacks.onDatesChange({ start, end });
     }
 

resources/js/packages/ui/src/FullCalendar/useContextMenu.ts

@@ -1,8 +1,8 @@
 import { ref, type Ref, type ComputedRef } from 'vue';
 import type { Dayjs } from 'dayjs';
 import type { TimeEntry } from '@/packages/api/src';
-import { getDayJsInstance } from '../utils/time';
-import { getUserTimezone } from '../utils/settings';
+import { getDayJsInstance, getLocalizedDayJsFromMinutes } from '../utils/time';
+
 import type { CalendarSettings } from './calendarSettings';
 import type { CalendarEvent } from './calendarTypes';
 
@@ -34,11 +34,8 @@ export function useContextMenu(params: {
         const snap = params.calendarSettings.value.snapMinutes;
         const snappedMinutes = Math.floor(minutesFromGridStart / snap) * snap;
 
-        const dayjs = getDayJsInstance();
-        const startLocal = dayjs(`${date}T00:00:00`)
-            .tz(getUserTimezone(), true)
-            .add(snappedMinutes, 'minute');
-        const snappedEnd = startLocal.add(snap, 'minute');
+        const startLocal = getLocalizedDayJsFromMinutes(date, snappedMinutes);
+        const snappedEnd = getLocalizedDayJsFromMinutes(date, snappedMinutes + snap);
 
         return { start: startLocal.utc(), end: snappedEnd.utc() };
     }

resources/js/packages/ui/src/FullCalendar/useEventDrag.ts

@@ -1,8 +1,7 @@
 import { computed, ref, onUnmounted, type Ref, type ComputedRef } from 'vue';
 import type { Dayjs } from 'dayjs';
 import type { TimeEntry } from '@/packages/api/src';
-import { getDayJsInstance, getLocalizedDayJs } from '../utils/time';
-import { getUserTimezone } from '../utils/settings';
+import { getLocalizedDayJs, getLocalizedDayJsFromMinutes } from '../utils/time';
 import type { CalendarSettings } from './calendarSettings';
 import type { CalendarEvent, DayEvent } from './calendarTypes';
 import { SLOT_HEIGHT, DRAG_THRESHOLD } from './calendarTypes';
@@ -67,8 +66,7 @@ export function useEventDrag(params: {
         }
 
         if (dayEvent.isClippedStart && originDay && ev.timeEntry.end) {
-            const dayjs = getDayJsInstance();
-            const dayMidnight = dayjs(`${originDay}T00:00:00`).tz(getUserTimezone(), true);
+            const dayMidnight = getLocalizedDayJsFromMinutes(originDay, 0);
             const evStart = getLocalizedDayJs(ev.timeEntry.start);
             const eventStartFromGridStart = evStart.diff(dayMidnight, 'minute') - s.startHour * 60;
             const segmentTopMinutes = (dayEvent.top / SLOT_HEIGHT) * s.slotMinutes;
@@ -154,13 +152,11 @@ export function useEventDrag(params: {
         const lowerBound = startMin - 4 * 60;
         const clampedMinutes = Math.max(lowerBound, Math.min(snappedMinutes, s.endHour * 60));
 
-        const dayjs = getDayJsInstance();
-        const originalSegmentStart = dayjs(`${savedOriginalDayStr}T00:00:00`)
-            .tz(getUserTimezone(), true)
-            .add(startMin + params.pixelsToMinutesFromMidnight(dragStartEventTop), 'minute');
-        const newSegmentStart = dayjs(`${targetDateStr}T00:00:00`)
-            .tz(getUserTimezone(), true)
-            .add(clampedMinutes, 'minute');
+        const originalSegmentStart = getLocalizedDayJsFromMinutes(
+            savedOriginalDayStr,
+            startMin + params.pixelsToMinutesFromMidnight(dragStartEventTop)
+        );
+        const newSegmentStart = getLocalizedDayJsFromMinutes(targetDateStr, clampedMinutes);
         const deltaMs = newSegmentStart.diff(originalSegmentStart);
 
         const origStart = getLocalizedDayJs(timeEntry.start);
@@ -240,11 +236,14 @@ export function useEventDrag(params: {
         }
 
         // Multi-day: compute actual start/end datetimes, then clip per day
-        const dayjs = getDayJsInstance();
-        const eventStartAbsolute = dayjs(`${dragCurrentDay.value}T00:00:00`)
-            .tz(getUserTimezone(), true)
-            .add(startMin + eventStartOnGrid, 'minute');
-        const eventEndAbsolute = eventStartAbsolute.add(dragFullDurationMinutes, 'minute');
+        const eventStartAbsolute = getLocalizedDayJsFromMinutes(
+            dragCurrentDay.value,
+            startMin + eventStartOnGrid
+        );
+        const eventEndAbsolute = getLocalizedDayJsFromMinutes(
+            dragCurrentDay.value,
+            startMin + eventStartOnGrid + dragFullDurationMinutes
+        );
 
         const result: Record<string, Record<string, string>> = {};
 

resources/js/packages/ui/src/FullCalendar/useEventResize.ts

@@ -1,8 +1,7 @@
 import { computed, ref, onUnmounted, type Ref, type ComputedRef } from 'vue';
 import type { Dayjs } from 'dayjs';
 import type { TimeEntry } from '@/packages/api/src';
-import { getDayJsInstance, getLocalizedDayJs } from '../utils/time';
-import { getUserTimezone } from '../utils/settings';
+import { getDayJsInstance, getLocalizedDayJs, getLocalizedDayJsFromMinutes } from '../utils/time';
 import type { CalendarSettings } from './calendarSettings';
 import type { CalendarEvent, DayEvent } from './calendarTypes';
 import { SLOT_HEIGHT } from './calendarTypes';
@@ -11,10 +10,6 @@ function snapTo(value: number, step: number): number {
     return Math.round(value / step) * step;
 }
 
-function dayMidnightLocal(dayStr: string): Dayjs {
-    return getDayJsInstance()(`${dayStr}T00:00:00`).tz(getUserTimezone(), true);
-}
-
 export function useEventResize(params: {
     calendarSettings: Ref<CalendarSettings>;
     viewDays: ComputedRef<Dayjs[]>;
@@ -89,7 +84,7 @@ export function useEventResize(params: {
                           ),
                           s.snapMinutes
                       );
-            return { start, end: dayMidnightLocal(endDay).add(endMinutes, 'minute') };
+            return { start, end: getLocalizedDayJsFromMinutes(endDay, endMinutes) };
         } else {
             const end = resizeOriginalEvent.isRunning
                 ? getLocalizedDayJs()
@@ -105,7 +100,7 @@ export function useEventResize(params: {
                           params.pixelsToMinutesFromMidnight(resizeCurrentTop.value),
                           s.snapMinutes
                       );
-            return { start: dayMidnightLocal(startDay).add(startMinutes, 'minute'), end };
+            return { start: getLocalizedDayJsFromMinutes(startDay, startMinutes), end };
         }
     }
 

resources/js/packages/ui/src/FullCalendar/useSlotSelection.ts

@@ -1,7 +1,7 @@
 import { computed, ref, onUnmounted, type Ref, type ComputedRef } from 'vue';
 import type { Dayjs } from 'dayjs';
-import { getDayJsInstance } from '../utils/time';
-import { getUserTimezone } from '../utils/settings';
+import { getLocalizedDayJsFromMinutes } from '../utils/time';
+
 import type { CalendarSettings } from './calendarSettings';
 import { SLOT_HEIGHT } from './calendarTypes';
 
@@ -29,7 +29,7 @@ export function useSlotSelection(params: {
     function onSlotPointerDown(e: PointerEvent) {
         if (e.button !== 0) return;
         const target = e.target as HTMLElement;
-        if (target.closest('.fc-event') || target.closest('.activity-status-box')) return;
+        if (target.closest('.fc-event')) return;
 
         const dateStr = params.getDayFromClientX(e.clientX);
         if (!dateStr) return;
@@ -102,8 +102,6 @@ export function useSlotSelection(params: {
 
         const s = params.calendarSettings.value;
         const snap = s.snapMinutes;
-        const dayjs = getDayJsInstance();
-
         const startMinutes = params.pixelsToMinutesFromMidnight(selectionTop.value);
         const snappedStartMin = Math.floor(startMinutes / snap) * snap;
 
@@ -138,12 +136,8 @@ export function useSlotSelection(params: {
                 if (endMin <= 0) endMin = snap;
             }
 
-            startLocal = dayjs(`${startDateStr}T00:00:00`)
-                .tz(getUserTimezone(), true)
-                .add(startMin, 'minute');
-            endLocal = dayjs(`${endDateStr}T00:00:00`)
-                .tz(getUserTimezone(), true)
-                .add(endMin, 'minute');
+            startLocal = getLocalizedDayJsFromMinutes(startDateStr, startMin);
+            endLocal = getLocalizedDayJsFromMinutes(endDateStr, endMin);
         } else {
             const startDateStr = selectionStartDay;
             const endMinutes = params.pixelsToMinutesFromMidnight(
@@ -153,12 +147,8 @@ export function useSlotSelection(params: {
             if (snappedEndMin <= snappedStartMin) {
                 snappedEndMin = snappedStartMin + snap;
             }
-            startLocal = dayjs(`${startDateStr}T00:00:00`)
-                .tz(getUserTimezone(), true)
-                .add(snappedStartMin, 'minute');
-            endLocal = dayjs(`${startDateStr}T00:00:00`)
-                .tz(getUserTimezone(), true)
-                .add(snappedEndMin, 'minute');
+            startLocal = getLocalizedDayJsFromMinutes(startDateStr, snappedStartMin);
+            endLocal = getLocalizedDayJsFromMinutes(startDateStr, snappedEndMin);
         }
 
         params.onSelectionComplete(startLocal.utc(), endLocal.utc());

resources/js/packages/ui/src/GroupedItemsCountButton.vue

@@ -6,10 +6,15 @@ const props = withDefaults(
     defineProps<{
         expanded?: boolean;
         size?: string;
+        /**
+         * Test ID used for Playwright/E2E tests.
+         */
+        testId?: string;
     }>(),
     {
         expanded: false,
         size: 'w-7 h-7',
+        testId: 'grouped_items_count_button',
     }
 );
 
@@ -23,6 +28,7 @@ const expandedStatusClasses = computed(() => {
 
 <template>
     <button
+        :data-testid="props.testId"
         :class="
             twMerge(
                 'font-medium text-base rounded flex items-center transition justify-center focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:border-transparent',

resources/js/packages/ui/src/Input/DurationSecondsInput.vue

@@ -0,0 +1,145 @@
+<script setup lang="ts">
+import { computed, inject, ref, type ComputedRef } from 'vue';
+import { formatHumanReadableDuration, parseTimeInput } from '@/packages/ui/src/utils/time';
+import TextInput from '@/packages/ui/src/Input/TextInput.vue';
+import type { Organization } from '@/packages/api/src';
+
+const organization = inject<ComputedRef<Organization>>('organization');
+
+const organizationSettings = computed(() => ({
+    intervalFormat: organization?.value?.interval_format ?? 'hours-minutes',
+    numberFormat: organization?.value?.number_format ?? 'point',
+}));
+
+const props = withDefaults(
+    defineProps<{
+        modelValue?: number | null;
+        placeholder?: string;
+        disabled?: boolean;
+        inputClass?: string;
+        size?: 'sm' | 'base';
+        defaultUnit?: 'auto' | 'hours' | 'minutes';
+    }>(),
+    {
+        modelValue: null,
+        placeholder: '-',
+        disabled: false,
+        inputClass: '',
+        size: 'base',
+        defaultUnit: 'auto',
+    }
+);
+
+const emit = defineEmits<{
+    'update:modelValue': [value: number | null];
+    commit: [value: number | null];
+    submit: [];
+}>();
+
+const temporaryValue = ref('');
+const isEditing = ref(false);
+const hasPendingEdit = ref(false);
+const skipNextCommit = ref(false);
+
+function formatModelValue(value: number | null | undefined): string {
+    if (!value || value === 0) {
+        return '';
+    }
+
+    return formatHumanReadableDuration(
+        value,
+        organizationSettings.value.intervalFormat,
+        organizationSettings.value.numberFormat
+    );
+}
+
+const displayValue = computed({
+    get() {
+        if (isEditing.value) {
+            return temporaryValue.value;
+        }
+        return formatModelValue(props.modelValue);
+    },
+    set(newValue: string) {
+        temporaryValue.value = newValue;
+        hasPendingEdit.value = true;
+    },
+});
+
+function selectInput(event: Event) {
+    isEditing.value = true;
+    hasPendingEdit.value = false;
+    skipNextCommit.value = false;
+    temporaryValue.value = formatModelValue(props.modelValue);
+    const target = event.target as HTMLInputElement;
+    target.select();
+}
+
+function resetEditingState() {
+    temporaryValue.value = '';
+    isEditing.value = false;
+    hasPendingEdit.value = false;
+}
+
+function commitValue() {
+    if (skipNextCommit.value) {
+        skipNextCommit.value = false;
+        return;
+    }
+
+    const input = temporaryValue.value.trim();
+    const shouldCommit = hasPendingEdit.value;
+    resetEditingState();
+
+    if (!shouldCommit) {
+        return;
+    }
+
+    // Blank or literal "0" → null. Consumers decide what null means
+    // (clear estimate, delete cell, etc.) by reading their own emit.
+    if (input === '' || input === '0') {
+        emit('update:modelValue', null);
+        emit('commit', null);
+        return;
+    }
+
+    const defaultUnit =
+        props.defaultUnit === 'auto'
+            ? organizationSettings.value.intervalFormat === 'decimal'
+                ? 'hours'
+                : 'minutes'
+            : props.defaultUnit;
+    const seconds = parseTimeInput(input, organizationSettings.value.numberFormat, defaultUnit);
+
+    if (seconds !== null && seconds >= 0) {
+        emit('update:modelValue', seconds);
+        emit('commit', seconds);
+    }
+}
+
+function cancelEdit(event: Event) {
+    skipNextCommit.value = true;
+    resetEditingState();
+    (event.target as HTMLInputElement).blur();
+}
+
+function commitAndSubmit() {
+    commitValue();
+    emit('submit');
+}
+</script>
+
+<template>
+    <TextInput
+        v-model="displayValue"
+        data-testid="duration_seconds_input"
+        name="Duration"
+        :size="size"
+        :disabled="disabled"
+        :placeholder="isEditing ? '0' : placeholder"
+        :class="inputClass"
+        @focus="selectInput"
+        @blur="commitValue"
+        @keydown.enter.prevent="commitAndSubmit"
+        @keydown.escape="cancelEdit" />
+</template>

resources/js/packages/ui/src/Input/EstimatedTimeInput.vue

@@ -1,12 +1,6 @@
 <script setup lang="ts">
-import { onMounted, ref, watch, inject } from 'vue';
-import { formatHumanReadableDuration, parseTimeInput } from '@/packages/ui/src/utils/time';
+import DurationSecondsInput from '@/packages/ui/src/Input/DurationSecondsInput.vue';
 import { twMerge } from 'tailwind-merge';
-import { TextInput } from '@/packages/ui/src';
-import type { Organization } from '@/packages/api/src';
-import { type ComputedRef } from 'vue';
-
-const temporaryInput = ref<string>('');
 
 const model = defineModel<number | null>({
     default: null,
@@ -16,64 +10,16 @@ const emit = defineEmits<{
     submit: [];
 }>();
 
-const organization = inject<ComputedRef<Organization>>('organization');
-
-function updateDuration() {
-    const input = temporaryInput.value.trim();
-
-    if (input === '') {
-        model.value = null;
-        return;
-    }
-
-    const seconds = parseTimeInput(input, organization?.value?.number_format, 'hours');
-    if (seconds !== null && seconds > 0) {
-        model.value = seconds;
-    }
-
-    updateInputDisplay();
-}
-
 const props = defineProps<{
     class?: string;
 }>();
-
-watch(model, updateInputDisplay);
-onMounted(() => updateInputDisplay());
-
-function updateInputDisplay() {
-    if (model.value !== null && model.value > 0) {
-        temporaryInput.value = formatHumanReadableDuration(
-            model.value,
-            organization?.value?.interval_format,
-            organization?.value?.number_format
-        );
-    } else {
-        temporaryInput.value = '';
-    }
-}
-
-function selectInput(event: Event) {
-    const target = event.target as HTMLInputElement;
-    target.select();
-}
-
-function updateAndSubmit() {
-    updateDuration();
-    emit('submit');
-}
 </script>
 
 <template>
-    <TextInput
-        ref="inputField"
-        v-model="temporaryInput"
-        :class="twMerge('text-text-secondary', props.class)"
-        type="text"
+    <DurationSecondsInput
+        v-model="model"
+        :input-class="twMerge('placeholder:text-text-tertiary', props.class)"
         placeholder="e.g. 2h 30m or 1.5"
-        @focus="selectInput"
-        @blur="updateDuration"
-        @keydown.enter="updateAndSubmit" />
+        default-unit="hours"
+        @submit="emit('submit')" />
 </template>
-
-<style scoped></style>

resources/js/packages/ui/src/Input/TextInput.vue

@@ -1,11 +1,15 @@
 <script setup lang="ts">
-import { onMounted, ref } from 'vue';
+import { computed, onMounted, ref } from 'vue';
 import { twMerge } from 'tailwind-merge';
 
-const props = defineProps<{
-    name?: string;
-    class?: string;
-}>();
+const props = withDefaults(
+    defineProps<{
+        name?: string;
+        class?: string;
+        size?: 'sm' | 'base';
+    }>(),
+    { size: 'base' }
+);
 
 const input = ref<HTMLInputElement | null>(null);
 
@@ -17,6 +21,10 @@ onMounted(() => {
 
 defineExpose({ focus: () => input.value?.focus() });
 const model = defineModel();
+
+const sizeClasses = computed(() =>
+    props.size === 'sm' ? 'h-7 px-2 py-0.5 text-xs' : 'h-9 px-3 py-1 text-base sm:text-sm'
+);
 </script>
 
 <template>
@@ -25,7 +33,8 @@ const model = defineModel();
         v-model="model"
         :class="
             twMerge(
-                'h-9 px-3 py-1 text-base sm:text-sm border-input-border border bg-input-background text-text-primary focus-visible:ring-2 focus-visible:ring-ring focus-visible:border-transparent rounded-md shadow-sm',
+                'border-input-border border bg-input-background text-text-primary focus-visible:ring-2 focus-visible:ring-ring focus-visible:border-transparent rounded-md shadow-sm',
+                sizeClasses,
                 props.class
             )
         "

resources/js/packages/ui/src/Project/ProjectCreateModal.vue

@@ -27,6 +27,7 @@ const props = defineProps<{
     currency: string;
     enableEstimatedTime: boolean;
     organizationBillableRate: number | null;
+    initialProjectName?: string;
 }>();
 
 const activeClients = computed(() => {
@@ -34,7 +35,7 @@ const activeClients = computed(() => {
 });
 
 const project = ref<CreateProjectBody>({
-    name: '',
+    name: props.initialProjectName ?? '',
     color: getRandomColor(),
     client_id: null,
     billable_rate: null,

resources/js/packages/ui/src/TimeEntry/TimeEntryDescriptionInput.vue

@@ -32,10 +32,10 @@ const displaysPlaceholder = computed(() => {
 
 <template>
     <div class="relative min-w-0 text-ellipsis whitespace-nowrap overflow-hidden">
-        <div class="relative text-sm font-medium min-w-0">
+        <div class="relative text-sm min-w-0">
             <div
                 :class="[
-                    'opacity-0 h-4 text-sm whitespace-pre font-medium min-w-0 pl-1.5 @lg:pl-3 pr-1',
+                    'opacity-0 h-4 text-sm whitespace-pre min-w-0 pl-1.5 @lg:pl-3 pr-1',
                     { 'min-w-[130px]': displaysPlaceholder },
                 ]">
                 {{ liveDataValue }}
@@ -44,7 +44,7 @@ const displaysPlaceholder = computed(() => {
                 data-testid="time_entry_description"
                 :value="liveDataValue"
                 placeholder="Add a description"
-                class="absolute px-0 h-full min-w-0 pl-1.5 @lg:pl-3 pr-1 left-0 top-0 w-full text-sm text-text-primary font-medium bg-transparent focus-visible:ring-0 rounded-lg border-0"
+                class="absolute px-0 h-full min-w-0 pl-1.5 @lg:pl-3 pr-1 left-0 top-0 w-full text-sm text-text-primary bg-transparent focus-visible:ring-0 rounded-lg border-0"
                 @blur="onChange"
                 @input="onInput"
                 @keydown.enter="onChange" />

resources/js/packages/ui/src/TimeEntry/TimeEntryGroupedTable.vue

@@ -20,24 +20,30 @@ const selectedTimeEntries = defineModel<TimeEntry[]>('selected', {
     default: [],
 });
 
-const props = defineProps<{
-    timeEntries: TimeEntry[];
-    projects: Project[];
-    tasks: Task[];
-    tags: Tag[];
-    clients: Client[];
-    createTag: (name: string) => Promise<Tag | undefined>;
-    updateTimeEntry: (entry: TimeEntry) => void;
-    updateTimeEntries: (ids: string[], changes: Partial<TimeEntry>) => void;
-    deleteTimeEntries: (entries: TimeEntry[]) => void;
-    createTimeEntry: (entry: Omit<CreateTimeEntryBody, 'member_id'>) => void;
-    createProject: (project: CreateProjectBody) => Promise<Project | undefined>;
-    createClient: (client: CreateClientBody) => Promise<Client | undefined>;
-    currency: string;
-    organizationBillableRate: number | null;
-    enableEstimatedTime: boolean;
-    canCreateProject: boolean;
-}>();
+const props = withDefaults(
+    defineProps<{
+        timeEntries: TimeEntry[];
+        projects: Project[];
+        tasks: Task[];
+        tags: Tag[];
+        clients: Client[];
+        createTag: (name: string) => Promise<Tag | undefined>;
+        updateTimeEntry: (entry: TimeEntry) => void;
+        updateTimeEntries: (ids: string[], changes: Partial<TimeEntry>) => void;
+        deleteTimeEntries: (entries: TimeEntry[]) => void;
+        createTimeEntry: (entry: Omit<CreateTimeEntryBody, 'member_id'>) => void;
+        createProject: (project: CreateProjectBody) => Promise<Project | undefined>;
+        createClient: (client: CreateClientBody) => Promise<Client | undefined>;
+        currency: string;
+        organizationBillableRate: number | null;
+        enableEstimatedTime: boolean;
+        canCreateProject: boolean;
+        groupSimilarTimeEntries?: boolean;
+    }>(),
+    {
+        groupSimilarTimeEntries: true,
+    }
+);
 
 const groupedTimeEntries = computed(() => {
     const groupedEntriesByDay: Record<string, TimeEntry[]> = {};
@@ -58,6 +64,11 @@ const groupedTimeEntries = computed(() => {
         const newDailyEntries: TimeEntriesGroupedByType[] = [];
 
         for (const entry of dailyEntries) {
+            if (!props.groupSimilarTimeEntries) {
+                newDailyEntries.push({ ...entry, timeEntries: [entry] });
+                continue;
+            }
+
             // check if same entry already exists
             const oldEntriesIndex = newDailyEntries.findIndex(
                 (e) =>

resources/js/packages/ui/src/TimeEntry/TimeEntryMassActionRow.vue

@@ -14,7 +14,7 @@ import type {
 } from '@/packages/api/src';
 import { ref } from 'vue';
 import { twMerge } from 'tailwind-merge';
-import { Checkbox } from '@/packages/ui/src';
+import { Button, Checkbox } from '@/packages/ui/src';
 import { FieldLabel } from '../field';
 
 const props = defineProps<{
@@ -66,7 +66,7 @@ const showMassUpdateModal = ref(false);
         :class="
             twMerge(
                 props.class,
-                'text-sm py-1.5 font-medium hidden sm:flex border-b border-border-primary items-center space-x-3'
+                'text-sm h-8 font-medium hidden sm:flex border-b border-border-primary items-center space-x-3'
             )
         ">
         <Checkbox
@@ -83,20 +83,24 @@ const showMassUpdateModal = ref(false);
         <FieldLabel v-else for="selectAll" class="text-text-secondary select-none"
             >Select All</FieldLabel
         >
-        <button
+        <Button
             v-if="selectedTimeEntries.length"
-            class="text-text-tertiary flex space-x-1 items-center hover:text-text-secondary transition focus-visible:ring-2 outline-0 focus-visible:text-text-primary focus-visible:ring-ring rounded h-full px-2"
+            variant="ghost"
+            size="xs"
+            class="text-text-tertiary hover:text-text-secondary"
             @click="showMassUpdateModal = true">
             <PencilSquareIcon class="w-4"></PencilSquareIcon>
-            <span> Edit </span>
-        </button>
-        <button
+            <span>Edit</span>
+        </Button>
+        <Button
             v-if="selectedTimeEntries.length"
-            class="text-red-400 h-full px-2 space-x-1 items-center flex hover:text-red-500 transition focus-visible:ring-2 outline-0 focus-visible:text-red-500 focus-visible:ring-ring rounded"
+            variant="ghost"
+            size="xs"
+            class="text-red-400 hover:text-red-500 hover:bg-red-500/10"
             @click="deleteSelected">
             <TrashIcon class="w-3.5"></TrashIcon>
-            <span> Delete </span>
-        </button>
+            <span>Delete</span>
+        </Button>
     </MainContainer>
 </template>
 

resources/js/packages/ui/src/TimeEntry/TimeEntryRangeSelector.vue

@@ -36,15 +36,13 @@ const organization = inject<ComputedRef<Organization>>('organization');
                     :class="
                         twMerge(
                             'text-text-secondary px-1 bg-transparent text-center hover:bg-card-background rounded-lg border border-transparent hover:border-card-border focus-visible:outline-none focus:outline-none focus-visible:ring-2 focus-visible:text-text-primary focus-visible:ring-ring focus-visible:bg-tertiary',
-                            showDate
-                                ? 'text-xs py-1.5 font-semibold'
-                                : 'text-sm py-1.5 font-medium',
+                            showDate ? 'text-xs py-1.5 font-medium' : 'text-sm py-1.5 font-normal',
                             organization?.time_format === '12-hours' ? 'w-[160px]' : 'w-[100px]',
                             open && 'border-card-border bg-card-background'
                         )
                     ">
                     {{ formatStartEnd(start, end, organization?.time_format) }}
-                    <span v-if="showDate" class="text-text-tertiary font-medium"
+                    <span v-if="showDate" class="text-text-tertiary font-normal"
                         >{{ formatDateLocalized(start, organization?.date_format) }}
                     </span>
                 </button>

resources/js/packages/ui/src/TimeEntry/TimeEntryRow.vue

@@ -52,6 +52,7 @@ const props = defineProps<{
     selected?: boolean;
     canCreateProject: boolean;
     enableEstimatedTime: boolean;
+    isReport?: boolean;
 }>();
 
 const emit = defineEmits<{ selected: []; unselected: [] }>();
@@ -148,8 +149,7 @@ async function handleDeleteTimeEntry() {
                                 :task="timeEntry.task_id"
                                 @changed="updateProjectAndTask"></TimeTrackerProjectTaskDropdown>
                         </div>
-                        <div
-                            class="hidden @lg:flex items-center font-medium space-x-1 @lg:space-x-2 shrink-0">
+                        <div class="hidden @lg:flex items-center space-x-1 @lg:space-x-2 shrink-0">
                             <div v-if="showMember && members" class="text-sm px-2">
                                 {{ memberName }}
                             </div>
@@ -173,6 +173,7 @@ async function handleDeleteTimeEntry() {
                             <TimeEntryRowDurationInput
                                 :start="timeEntry.start"
                                 :end="timeEntry.end"
+                                :is-report="props.isReport"
                                 @changed="updateStartEndTime"></TimeEntryRowDurationInput>
                             <TimeTrackerStartStop
                                 :active="!!(timeEntry.start && !timeEntry.end)"
@@ -197,6 +198,7 @@ async function handleDeleteTimeEntry() {
                                 <TimeEntryRowDurationInput
                                     :start="timeEntry.start"
                                     :end="timeEntry.end"
+                                    :is-report="props.isReport"
                                     @changed="updateStartEndTime"></TimeEntryRowDurationInput>
                             </div>
                             <!-- Second row: project/task - tags - billable - start - more -->

resources/js/packages/ui/src/TimeEntry/TimeEntryRowDurationInput.vue

@@ -2,6 +2,7 @@
 import {
     calculateDifference,
     formatHumanReadableDuration,
+    formatReportingDuration,
     parseTimeInput,
 } from '@/packages/ui/src/utils/time';
 import { computed, ref, inject, type ComputedRef } from 'vue';
@@ -18,6 +19,7 @@ const organizationSettings = computed(() => ({
 const props = defineProps<{
     start: string;
     end: string | null;
+    isReport?: boolean;
 }>();
 const emit = defineEmits<{
     changed: [start: string, end: string | null];
@@ -51,7 +53,8 @@ const currentTime = computed({
         if (temporaryCustomTimerEntry.value !== '') {
             return temporaryCustomTimerEntry.value;
         }
-        return formatHumanReadableDuration(
+        const formatter = props.isReport ? formatReportingDuration : formatHumanReadableDuration;
+        return formatter(
             calculateDifference(props.start, props.end),
             organizationSettings.value.intervalFormat,
             organizationSettings.value.numberFormat

resources/js/packages/ui/src/TimeEntry/TimeEntryRowHeading.vue

@@ -47,14 +47,14 @@ function selectUnselectAll(value: boolean) {
                             class="group-hover:block hidden"
                             @update:checked="selectUnselectAll"></Checkbox>
                     </div>
-                    <span class="font-medium text-text-secondary">
+                    <span class="text-text-primary">
                         {{ formatWeekday(date) }}
                     </span>
-                    <span class="text-text-tertiary ml-2">
+                    <span class="text-text-secondary ml-2">
                         {{ formatDate(date, organization?.date_format) }}
                     </span>
                 </div>
-                <div class="text-text-secondary pr-2 @lg:pr-[92px]">
+                <div class="text-text-primary pr-2 @lg:pr-[92px]">
                     <span class="font-medium">
                         {{
                             formatHumanReadableDuration(

resources/js/packages/ui/src/TimeTracker/TimeTrackerControls.vue

@@ -215,7 +215,7 @@ useSelectEvents(
                     v-model="tempDescription"
                     placeholder="What are you working on?"
                     data-testid="time_entry_description"
-                    class="w-full rounded-l-lg py-4 sm:py-2.5 px-3.5 border-b border-b-card-background-separator @2xl:px-4 text-base text-text-primary bg-transparent border-none placeholder-text-secondary font-medium focus:ring-0 transition"
+                    class="w-full rounded-l-lg py-4 sm:py-2.5 px-3.5 border-b border-b-card-background-separator @2xl:px-4 text-base text-text-primary bg-transparent border-none placeholder-text-secondary focus:ring-0 transition"
                     type="text"
                     @keydown.enter="startTimerIfNotActive"
                     @keydown.esc="showDropdown = false"

resources/js/packages/ui/src/TimeTracker/TimeTrackerProjectTaskDropdown.test.ts

@@ -0,0 +1,90 @@
+/* eslint-disable vue/one-component-per-file */
+import { mount } from '@vue/test-utils';
+import { describe, expect, it, vi } from 'vitest';
+import { defineComponent, h, nextTick, onMounted } from 'vue';
+import TimeTrackerProjectTaskDropdown from './TimeTrackerProjectTaskDropdown.vue';
+import type { Client, Project, Task } from '@/packages/api/src';
+
+const DropdownStub = defineComponent({
+    props: {
+        modelValue: {
+            type: Boolean,
+            default: false,
+        },
+    },
+    emits: ['update:modelValue'],
+    setup(_, { emit, slots }) {
+        onMounted(() => emit('update:modelValue', true));
+        return () => h('div', [slots.trigger?.(), slots.content?.()]);
+    },
+});
+
+const FocusTrapStub = defineComponent({
+    setup(_, { slots }) {
+        return () => h('div', slots.default?.());
+    },
+});
+
+function mountDropdown(props: Record<string, unknown> = {}) {
+    return mount(TimeTrackerProjectTaskDropdown, {
+        props: {
+            project: null,
+            task: null,
+            projects: [] as Project[],
+            tasks: [] as Task[],
+            clients: [] as Client[],
+            createProject: vi.fn(),
+            createClient: vi.fn(),
+            currency: 'EUR',
+            enableEstimatedTime: false,
+            organizationBillableRate: null,
+            canCreateProject: false,
+            ...props,
+        },
+        global: {
+            stubs: {
+                Dropdown: DropdownStub,
+                UseFocusTrap: FocusTrapStub,
+            },
+        },
+    });
+}
+
+async function openDropdown() {
+    const wrapper = mountDropdown();
+    await nextTick();
+    await nextTick();
+    return wrapper;
+}
+
+describe('TimeTrackerProjectTaskDropdown', () => {
+    it('keeps the existing empty-string no-project value by default', async () => {
+        const wrapper = await openDropdown();
+
+        await wrapper.find('[data-project-id=""]').trigger('click');
+
+        expect(wrapper.emitted('update:project')?.at(-1)).toEqual(['']);
+        expect(wrapper.emitted('changed')?.at(-1)).toEqual(['', null]);
+    });
+
+    it('can emit null for no-project consumers that use null as the domain value', async () => {
+        const wrapper = mountDropdown({ project: 'p-1', noProjectValue: null });
+        await nextTick();
+        await nextTick();
+
+        await wrapper.find('[data-project-id=""]').trigger('click');
+
+        expect(wrapper.emitted('update:project')?.at(-1)).toEqual([null]);
+        expect(wrapper.emitted('changed')?.at(-1)).toEqual([null, null]);
+    });
+
+    it('still exposes "No Project" when projects are empty and project creation is allowed', async () => {
+        const wrapper = mountDropdown({ canCreateProject: true });
+        await nextTick();
+        await nextTick();
+
+        await wrapper.find('[data-project-id=""]').trigger('click');
+
+        expect(wrapper.emitted('changed')?.at(-1)).toEqual(['', null]);
+    });
+});

resources/js/packages/ui/src/TimeTracker/TimeTrackerProjectTaskDropdown.vue

@@ -11,11 +11,13 @@ import type {
     Client,
 } from '@/packages/api/src';
 
-import { PlusIcon, PlusCircleIcon, MinusIcon, XMarkIcon } from '@heroicons/vue/16/solid';
+import { PlusCircleIcon, MinusIcon, XMarkIcon } from '@heroicons/vue/16/solid';
 import ProjectCreateModal from '@/packages/ui/src/Project/ProjectCreateModal.vue';
 import { twMerge } from 'tailwind-merge';
 import { Button } from '@/packages/ui/src/Buttons';
 
+const NO_PROJECT_ID = '';
+
 const task = defineModel<string | null>('task', {
     default: null,
 });
@@ -57,6 +59,7 @@ const props = withDefaults(
         currency: string;
         emptyPlaceholder?: string;
         allowReset?: boolean;
+        noProjectValue?: string | null;
         enableEstimatedTime: boolean;
         organizationBillableRate: number | null;
         canCreateProject: boolean;
@@ -68,6 +71,7 @@ const props = withDefaults(
     {
         emptyPlaceholder: 'No Project',
         allowReset: false,
+        noProjectValue: NO_PROJECT_ID,
         variant: 'ghost',
         align: 'center',
         size: 'sm',
@@ -164,10 +168,10 @@ function updateFilteredResults() {
             is_archived: false,
             projects: [
                 {
-                    id: '',
+                    id: NO_PROJECT_ID,
                     name: 'No Project',
                     color: 'var(--theme-color-icon-default)',
-                    value: '',
+                    value: NO_PROJECT_ID,
                     client_id: null,
                     billable_rate: null,
                     is_archived: false,
@@ -490,7 +494,7 @@ function selectTask(taskId: string) {
 }
 
 function selectProject(projectId: string) {
-    project.value = projectId;
+    project.value = projectId === NO_PROJECT_ID ? props.noProjectValue : projectId;
     task.value = null;
     open.value = false;
     searchValue.value = '';
@@ -507,41 +511,35 @@ const showCreateProject = ref(false);
 </script>
 
 <template>
-    <template v-if="projects.length === 0 && canCreateProject">
-        <Button
-            :variant="props.variant"
-            :size="props.size"
-            :class="twMerge('w-full justify-start', props.class)"
-            @click="showCreateProject = true">
-            <PlusIcon class="w-4" />
-            <span class="truncate">Add new project</span>
-        </Button>
-    </template>
-    <Dropdown v-else v-model="open" :close-on-content-click="false" :align="props.align">
+    <Dropdown v-model="open" :close-on-content-click="false" :align="props.align">
         <template #trigger>
-            <div class="flex items-center gap-1">
-                <Button
-                    :variant="props.variant"
-                    :size="props.size"
-                    :class="twMerge('w-full justify-start overflow-hidden', props.class)">
-                    <div
-                        class="w-3 h-3 rounded-full shrink-0"
-                        :style="{ backgroundColor: selectedProjectColor }"></div>
-                    <span class="truncate shrink-[1] pr-1">{{ selectedProjectName }}</span>
-                    <template v-if="currentTask">
-                        <ChevronRightIcon class="w-4 h-4 text-text-tertiary shrink-0" />
-                        <span class="truncate shrink-[100]">{{ currentTask.name }}</span>
-                    </template>
-                </Button>
-                <button
-                    v-if="allowReset && project !== null"
-                    type="button"
-                    data-testid="project_reset_button"
-                    class="p-1 rounded hover:bg-quaternary text-text-tertiary hover:text-text-primary"
-                    @click.stop="resetProject">
-                    <XMarkIcon class="w-4 h-4" />
-                </button>
-            </div>
+            <slot name="trigger">
+                <div class="flex items-center gap-1">
+                    <Button
+                        :variant="props.variant"
+                        :size="props.size"
+                        :class="twMerge('w-full justify-start overflow-hidden', props.class)">
+                        <div
+                            class="w-3 h-3 rounded-full shrink-0"
+                            :style="{ backgroundColor: selectedProjectColor }"></div>
+                        <span class="truncate shrink-[1] text-text-primary pr-1">{{
+                            selectedProjectName
+                        }}</span>
+                        <template v-if="currentTask">
+                            <ChevronRightIcon class="w-4 h-4 text-text-tertiary shrink-0" />
+                            <span class="truncate shrink-[100]">{{ currentTask.name }}</span>
+                        </template>
+                    </Button>
+                    <button
+                        v-if="allowReset && project !== null"
+                        type="button"
+                        data-testid="project_reset_button"
+                        class="p-1 rounded hover:bg-quaternary text-text-tertiary hover:text-text-primary"
+                        @click.stop="resetProject">
+                        <XMarkIcon class="w-4 h-4" />
+                    </button>
+                </div>
+            </slot>
         </template>
         <template #content>
             <UseFocusTrap v-if="open" :options="{ immediate: true, allowOutsideClick: true }">
@@ -664,7 +662,8 @@ const showCreateProject = ref(false);
         :organization-billable-rate="organizationBillableRate"
         :currency="currency"
         :clients="clients"
-        :create-project></ProjectCreateModal>
+        :create-project
+        :initial-project-name="searchValue"></ProjectCreateModal>
 </template>
 
 <style scoped></style>

resources/js/packages/ui/src/calendar/CalendarCell.vue

@@ -1,7 +1,7 @@
 <script lang="ts" setup>
 import { CalendarCell, type CalendarCellProps, useForwardProps } from 'reka-ui';
 import { computed, type HTMLAttributes } from 'vue';
-import { twMerge } from 'tailwind-merge';
+import { cn } from '../utils/cn';
 
 const props = defineProps<CalendarCellProps & { class?: HTMLAttributes['class'] }>();
 
@@ -17,7 +17,7 @@ const forwardedProps = useForwardProps(delegatedProps);
 <template>
     <CalendarCell
         :class="
-            twMerge(
+            cn(
                 'relative p-0 text-center text-sm focus-within:relative focus-within:z-20 [&:has([data-selected])]:rounded-md [&:has([data-selected])]:bg-accent [&:has([data-selected][data-outside-view])]:bg-accent/50',
                 props.class
             )

resources/js/packages/ui/src/tooltip/TooltipContent.vue

@@ -29,7 +29,7 @@ const forwarded = useForwardPropsEmits(delegatedProps, emits);
             v-bind="{ ...forwarded, ...$attrs }"
             :class="
                 cn(
-                    'z-50 overflow-hidden rounded-md bg-primary px-3 py-1.5 text-xs text-primary-foreground animate-in fade-in-0 zoom-in-95 data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=closed]:zoom-out-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2',
+                    'z-50 overflow-hidden rounded-md shadow-dropdown border border-border bg-primary px-3 py-1.5 text-xs text-primary-foreground animate-in fade-in-0 zoom-in-95 data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=closed]:zoom-out-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2',
                     props.class
                 )
             ">

resources/js/packages/ui/src/utils/settings.ts

@@ -8,6 +8,20 @@ export function getWeekStart() {
     }
     return weekStart;
 }
+
+const weekStartMap: Record<string, number> = {
+    sunday: 0,
+    monday: 1,
+    tuesday: 2,
+    wednesday: 3,
+    thursday: 4,
+    friday: 5,
+    saturday: 6,
+};
+
+export function getWeekStartDayNumber(): number {
+    return weekStartMap[getWeekStart()] ?? 1;
+}
 export function getUserTimezone() {
     const timezone = window?.getTimezoneSetting() as string;
     if (!timezone) {

resources/js/packages/ui/src/utils/time.test.ts

@@ -0,0 +1,44 @@
+import { describe, expect, test } from 'vitest';
+import { formatHumanReadableDuration, formatReportingDuration } from './time';
+
+const seconds = 14 * 3600 + 45 * 60 + 6; // 14h 45m 06s
+
+describe('formatHumanReadableDuration', () => {
+    test('decimal', () => {
+        expect(formatHumanReadableDuration(seconds, 'decimal', 'comma-point')).toBe('14.75 h');
+    });
+
+    test('hours-minutes', () => {
+        expect(formatHumanReadableDuration(seconds, 'hours-minutes')).toBe('14h 45min');
+    });
+
+    test('hours-minutes-colon-separated', () => {
+        expect(formatHumanReadableDuration(seconds, 'hours-minutes-colon-separated')).toBe('14:45');
+    });
+
+    test('hours-minutes-seconds-colon-separated', () => {
+        expect(formatHumanReadableDuration(seconds, 'hours-minutes-seconds-colon-separated')).toBe(
+            '14:45:06'
+        );
+    });
+});
+
+describe('formatReportingDuration', () => {
+    test('decimal', () => {
+        expect(formatReportingDuration(seconds, 'decimal', 'comma-point')).toBe('14.75 h');
+    });
+
+    test('hours-minutes', () => {
+        expect(formatReportingDuration(seconds, 'hours-minutes')).toBe('14:45:06');
+    });
+
+    test('hours-minutes-colon-separated', () => {
+        expect(formatReportingDuration(seconds, 'hours-minutes-colon-separated')).toBe('14:45:06');
+    });
+
+    test('hours-minutes-seconds-colon-separated', () => {
+        expect(formatReportingDuration(seconds, 'hours-minutes-seconds-colon-separated')).toBe(
+            '14:45:06'
+        );
+    });
+});

resources/js/packages/ui/src/utils/time.ts

@@ -3,6 +3,8 @@ import duration from 'dayjs/plugin/duration';
 import relativeTime from 'dayjs/plugin/relativeTime';
 import isToday from 'dayjs/plugin/isToday';
 import isYesterday from 'dayjs/plugin/isYesterday';
+import isSameOrBefore from 'dayjs/plugin/isSameOrBefore';
+import isSameOrAfter from 'dayjs/plugin/isSameOrAfter';
 import utc from 'dayjs/plugin/utc';
 import timezone from 'dayjs/plugin/timezone';
 import weekOfYear from 'dayjs/plugin/weekOfYear';
@@ -68,6 +70,8 @@ function configureParseLocale(numberFormat?: string) {
 dayjs.extend(relativeTime);
 dayjs.extend(isToday);
 dayjs.extend(isYesterday);
+dayjs.extend(isSameOrBefore);
+dayjs.extend(isSameOrAfter);
 dayjs.extend(duration);
 dayjs.extend(utc);
 dayjs.extend(timezone);
@@ -118,6 +122,26 @@ export function formatHumanReadableDuration(
     }
 }
 
+/**
+ * Format a duration for reporting views where cost and duration must reconcile.
+ *
+ * When the org's `hours-minutes` format is selected, seconds are normally dropped for
+ * readability (e.g. "14h 45min"). In reports this can make the total duration appear
+ * inconsistent with the billable cost (which is computed to the second). To keep the
+ * two columns reconcilable without inflating column widths with "14h 45min 06s",
+ * promote to the compact `HH:MM:SS` format in reporting contexts.
+ */
+export function formatReportingDuration(
+    duration: number,
+    intervalFormat?: string,
+    numberFormat?: string
+): string {
+    const promoted =
+        intervalFormat === 'hours-minutes' || intervalFormat === 'hours-minutes-colon-separated';
+    const effectiveFormat = promoted ? 'hours-minutes-seconds-colon-separated' : intervalFormat;
+    return formatHumanReadableDuration(duration, effectiveFormat, numberFormat);
+}
+
 export function formatDuration(duration: number): string {
     const dayJsDuration = dayjs.duration(duration, 's');
     const hours = Math.floor(dayJsDuration.asHours());
@@ -147,10 +171,36 @@ export function getLocalizedDayJs(timestamp?: string | null) {
     return dayjs.utc(timestamp).tz(getUserTimezone());
 }
 
+/**
+ * Create a dayjs instance for a specific wall-clock time on a given day.
+ * Sets hour/minute directly to avoid DST issues with .add(minutes) on
+ * transition days. Negative or overflow values are normalised by shifting
+ * whole days (`.add(n, 'day')` is DST-safe).
+ */
+export function getLocalizedDayJsFromMinutes(dayStr: string, minutesFromMidnight: number) {
+    const dayOffset = Math.floor(minutesFromMidnight / (24 * 60));
+    const remainder = minutesFromMidnight - dayOffset * 24 * 60;
+    return dayjs
+        .tz(`${dayStr}T00:00:00`, getUserTimezone())
+        .add(dayOffset, 'day')
+        .hour(Math.floor(remainder / 60))
+        .minute(Math.round(remainder % 60))
+        .second(0);
+}
+
 export function getLocalizedDateFromTimestamp(timestamp: string) {
     return getLocalizedDayJs(timestamp).format('YYYY-MM-DD');
 }
 
+/**
+ * Converts a local Date to a UTC-formatted ISO string.
+ * Treats the Date as being in the user's timezone and converts to UTC.
+ * This is the inverse of getLocalizedDayJs (which goes UTC → local).
+ */
+export function localDateToUtc(date: dayjs.Dayjs): string {
+    return date.tz(getUserTimezone(), true).utc().format();
+}
+
 /*
  * Returns a formatted date.
  * @param date - date in the format of 'YYYY-MM-DD'

resources/js/packages/ui/styles.css

@@ -14,28 +14,30 @@
 @tailwind utilities;
 
 :root.dark {
-    --color-bg-primary: oklch(0.14 0.0041 285.97);
-    --color-bg-secondary: oklch(0.18 0.005 285.97);
-    --color-bg-tertiary: oklch(0.22 0.0112 285.97);
-    --color-bg-quaternary: oklch(0.26 0.015 285.97);
-    --color-bg-background: oklch(0.1 0 0);
-    --color-text-primary: #ffffff;
-    --color-text-secondary: #e3e4e6;
-    --color-text-tertiary: #969799;
-    --color-text-quaternary: #595a5c;
+    /* Linear/Raycast: cool blue-tinted neutrals, content surface at Material floor */
+    --color-bg-primary: oklch(0.17 0 0);       /* content surface */
+    --color-bg-secondary: oklch(0.20 0 0);     /* cards, input fills */
+    --color-bg-tertiary: oklch(0.25 0 0);      /* hover / active row */
+    --color-bg-quaternary: oklch(0.29 0 0);    /* pressed / selected */
+    --color-bg-elevated: oklch(0.22 0 0);      /* popovers, modals, dropdowns */
+    --color-bg-background: oklch(0.14 0 0);    /* sidebar / chrome — recessed */
+    --color-text-primary: oklch(0.97 0 0);
+    --color-text-secondary: oklch(0.85 0 0);
+    --color-text-tertiary: oklch(0.70 0 0);
+    --color-text-quaternary: oklch(0.55 0 0);
 
-    --color-border-primary: #191b1f;
-    --color-border-secondary: oklch(0.25 0.0098 268.31);
-    --color-border-tertiary: #2c2e33;
-    --color-border-quaternary: #393b42;
-    --color-input-border-active: rgba(255, 255, 255, 0.15);
+    --color-border-primary: oklch(0.24 0 0);    /* separators — above elevated */
+    --color-border-secondary: oklch(0.28 0 0);  /* card borders */
+    --color-border-tertiary: oklch(0.32 0 0);   /* input borders */
+    --color-border-quaternary: oklch(0.36 0 0); /* emphasized borders */
+    --color-input-border-active: rgba(255, 255, 255, 0.18);
 
     --theme-color-chart: var(--color-accent-200);
 
     --theme-color-menu-active: var(--color-bg-secondary);
     --theme-color-card-background: var(--color-bg-secondary);
     --theme-shadow-card: 0 4px 7px 0px rgb(0 0 0 / 15%);
-    --theme-shadow-dropdown: 0 4px 7px 0px rgb(0 0 0 / 40%);
+    --theme-shadow-dropdown: 0 8px 24px -4px rgb(0 0 0 / 55%), 0 2px 6px 0 rgb(0 0 0 / 35%);
 
     --theme-color-card-background-active: var(--color-bg-tertiary);
 
@@ -187,7 +189,7 @@ body {
         --foreground: var(--color-text-primary);
         --card: var(--theme-color-card-background);
         --card-foreground: var(--color-text-primary);
-        --popover: var(--color-bg-secondary);
+        --popover: var(--color-bg-elevated, var(--color-bg-secondary));
         --popover-foreground: var(--color-text-primary);
         --primary: var(--color-bg-primary);
         --primary-foreground: var(--color-text-primary);

resources/js/packages/ui/tailwind.theme.js

@@ -104,7 +104,7 @@ export const solidtimeTheme = {
             border: 'var(--popover-border)',
         },
         destructive: {
-            DEFAULT: 'var(--destructive)',
+            DEFAULT: 'hsl(var(--destructive))',
             foreground: 'var(--destructive-foreground)',
         },
         border: 'var(--border)',

resources/js/test-setup.ts

@@ -0,0 +1,20 @@
+// Vitest setup file. Wires up the globals that the production code reads
+// off `window` (`getTimezoneSetting`, `getWeekStartSetting`, `getNumberFormat`,
+// `getIntervalFormat`) so that helpers under test don't crash when imported
+// outside the running app.
+
+import { vi } from 'vitest';
+
+declare global {
+    interface Window {
+        getTimezoneSetting: () => string;
+        getWeekStartSetting: () => string;
+        getNumberFormat: () => string;
+        getIntervalFormat: () => string;
+    }
+}
+
+window.getTimezoneSetting = vi.fn(() => 'UTC');
+window.getWeekStartSetting = vi.fn(() => 'monday');
+window.getNumberFormat = vi.fn(() => 'point');
+window.getIntervalFormat = vi.fn(() => 'hours-minutes');

resources/js/utils/notification.ts

@@ -57,6 +57,13 @@ export const useNotificationsStore = defineStore('notifications', () => {
                         'organization_has_no_subscription_but_multiple_members'
                     ) {
                         showActionBlockedModal.value = true;
+                    } else if (error?.response?.data?.key === 'overlapping_time_entry') {
+                        addNotification(
+                            'error',
+                            'Overlapping time entries are not allowed',
+                            error.response?.data?.message ??
+                                'This change would overlap with an existing time entry.'
+                        );
                     } else {
                         addNotification(
                             'error',

resources/js/utils/timeEntryGrouping.ts

@@ -0,0 +1,6 @@
+import { useStorage } from '@vueuse/core';
+
+export const groupSimilarTimeEntriesSetting = useStorage<boolean>(
+    'group-similar-time-entries',
+    true
+);

resources/js/utils/timesheet/cellMath.test.ts

@@ -0,0 +1,348 @@
+import { describe, it, expect } from 'vitest';
+import dayjs from 'dayjs';
+import utc from 'dayjs/plugin/utc';
+import timezone from 'dayjs/plugin/timezone';
+import { findFreeWindowOnDay, freeGapSecondsAfter, NoFreeWindowError } from './cellMath';
+import type { TimeEntry } from '@/packages/api/src';
+
+dayjs.extend(utc);
+dayjs.extend(timezone);
+
+// All times in the tests are in UTC for clarity. The "day" we search is
+// 2026-04-10 in UTC (so we use tz='UTC' to avoid local-machine surprises).
+const TZ = 'UTC';
+const DATE = '2026-04-10';
+
+/** Build a fake TimeEntry from UTC ISO timestamps. */
+function entry(start: string, end: string | null, id = `e-${start}-${end}`): TimeEntry {
+    const startMs = dayjs.utc(start).valueOf();
+    const endMs = end ? dayjs.utc(end).valueOf() : startMs;
+    return {
+        id,
+        start,
+        end,
+        duration: end ? Math.floor((endMs - startMs) / 1000) : null,
+        description: '',
+        member_id: 'm-1',
+        project_id: null,
+        task_id: null,
+        billable: false,
+        tags: [],
+        // The grid only reads the fields above; the rest are placeholders
+        // to satisfy the TimeEntry type without pulling in real fixtures.
+        user_id: 'u-1',
+        organization_id: 'o-1',
+    } as unknown as TimeEntry;
+}
+
+const HOUR = 3600;
+
+describe('findFreeWindowOnDay', () => {
+    // ── Empty / trivial cases ──────────────────────────────────────
+
+    it('returns the start of the day for a totally empty day', () => {
+        const result = findFreeWindowOnDay([], DATE, HOUR, TZ);
+        expect(result).toEqual({
+            start: '2026-04-10T00:00:00Z',
+            end: '2026-04-10T01:00:00Z',
+        });
+    });
+
+    it('returns null for zero or negative required seconds', () => {
+        expect(findFreeWindowOnDay([], DATE, 0, TZ)).toBeNull();
+        expect(findFreeWindowOnDay([], DATE, -1, TZ)).toBeNull();
+    });
+
+    it('refuses any duration > 24h on principle (single-day constraint)', () => {
+        const result = findFreeWindowOnDay([], DATE, 25 * HOUR, TZ);
+        expect(result).toBeNull();
+    });
+
+    // ── Single obstacle, basic gap finding ────────────────────────
+
+    it('finds the gap before a single obstacle if it fits', () => {
+        const obs = [entry('2026-04-10T10:00:00Z', '2026-04-10T11:00:00Z')];
+        const result = findFreeWindowOnDay(obs, DATE, HOUR, TZ);
+        expect(result?.start).toBe('2026-04-10T00:00:00Z');
+        expect(result?.end).toBe('2026-04-10T01:00:00Z');
+    });
+
+    it('finds the gap after a single obstacle when preferredStart skips earlier gaps', () => {
+        const obs = [entry('2026-04-10T10:00:00Z', '2026-04-10T11:00:00Z')];
+        const result = findFreeWindowOnDay(obs, DATE, HOUR, TZ, '2026-04-10T11:00:00Z');
+        expect(result?.start).toBe('2026-04-10T11:00:00Z');
+        expect(result?.end).toBe('2026-04-10T12:00:00Z');
+    });
+
+    // ── Multi-obstacle gap walking ────────────────────────────────
+
+    it('finds a gap between two obstacles', () => {
+        const obs = [
+            entry('2026-04-10T08:00:00Z', '2026-04-10T10:00:00Z'),
+            entry('2026-04-10T12:00:00Z', '2026-04-10T14:00:00Z'),
+        ];
+        // Search for 2h, expecting the [00:00, 08:00) gap (8h available)
+        const result = findFreeWindowOnDay(obs, DATE, 2 * HOUR, TZ);
+        expect(result?.start).toBe('2026-04-10T00:00:00Z');
+    });
+
+    it('walks past gaps that are too small', () => {
+        const obs = [
+            entry('2026-04-10T00:30:00Z', '2026-04-10T10:00:00Z'),
+            entry('2026-04-10T11:00:00Z', '2026-04-10T12:00:00Z'),
+        ];
+        // First gap is 30min, second gap is 1h, third is 12h.
+        // Asking for 90min → first two gaps are too small, third fits.
+        const result = findFreeWindowOnDay(obs, DATE, 90 * 60, TZ);
+        expect(result?.start).toBe('2026-04-10T12:00:00Z');
+    });
+
+    it('uses preferredStart even when it lands inside a gap', () => {
+        const obs = [
+            entry('2026-04-10T00:00:00Z', '2026-04-10T08:00:00Z'),
+            entry('2026-04-10T12:00:00Z', '2026-04-10T14:00:00Z'),
+        ];
+        // preferredStart 09:00 → gap is [09:00, 12:00) = 3h
+        const result = findFreeWindowOnDay(obs, DATE, 2 * HOUR, TZ, '2026-04-10T09:00:00Z');
+        expect(result?.start).toBe('2026-04-10T09:00:00Z');
+        expect(result?.end).toBe('2026-04-10T11:00:00Z');
+    });
+
+    it('skips ahead when preferredStart lands inside an obstacle', () => {
+        const obs = [entry('2026-04-10T08:00:00Z', '2026-04-10T12:00:00Z')];
+        // preferredStart 10:00 lands inside [08:00, 12:00). We must
+        // advance to the next free position (12:00).
+        const result = findFreeWindowOnDay(obs, DATE, HOUR, TZ, '2026-04-10T10:00:00Z');
+        expect(result?.start).toBe('2026-04-10T12:00:00Z');
+    });
+
+    // ── Spillover from previous day ───────────────────────────────
+
+    it('treats an entry that started yesterday but ends today as an obstacle', () => {
+        // Yesterday 23:00 → today 02:00 → blocks the first 2h of today.
+        const obs = [entry('2026-04-09T23:00:00Z', '2026-04-10T02:00:00Z')];
+        const result = findFreeWindowOnDay(obs, DATE, HOUR, TZ);
+        expect(result?.start).toBe('2026-04-10T02:00:00Z');
+    });
+
+    it('ignores an entry that ended exactly at the start of the day', () => {
+        // Yesterday 22:00 → today 00:00 (exclusive) → does NOT block today.
+        const obs = [entry('2026-04-09T22:00:00Z', '2026-04-10T00:00:00Z')];
+        const result = findFreeWindowOnDay(obs, DATE, HOUR, TZ);
+        expect(result?.start).toBe('2026-04-10T00:00:00Z');
+    });
+
+    // ── Running entries ────────────────────────────────────────────
+
+    it('treats a running entry as blocking up to "now"', () => {
+        const obs = [entry('2026-04-10T08:00:00Z', null)];
+        const now = '2026-04-10T10:30:00Z';
+        // The running entry blocks 08:00–10:30 → first free window is
+        // either before 08:00 (8h available, fits a 1h request).
+        const result = findFreeWindowOnDay(obs, DATE, HOUR, TZ, null, now);
+        expect(result?.start).toBe('2026-04-10T00:00:00Z');
+    });
+
+    it('places after a running entry when preferredStart pushes past it', () => {
+        const obs = [entry('2026-04-10T08:00:00Z', null)];
+        const now = '2026-04-10T10:30:00Z';
+        const result = findFreeWindowOnDay(obs, DATE, HOUR, TZ, '2026-04-10T09:00:00Z', now);
+        // preferredStart 09:00 lands inside the running entry's blocked
+        // range [08:00, 10:30) → must skip to 10:30.
+        expect(result?.start).toBe('2026-04-10T10:30:00Z');
+    });
+
+    // ── Midnight refusal ──────────────────────────────────────────
+
+    it('refuses to return a window that would cross midnight', () => {
+        const obs = [entry('2026-04-10T00:00:00Z', '2026-04-10T22:30:00Z')];
+        // Only 90min remain in the day. Asking for 2h → null.
+        const result = findFreeWindowOnDay(obs, DATE, 2 * HOUR, TZ);
+        expect(result).toBeNull();
+    });
+
+    it('accepts a window that ends exactly at midnight', () => {
+        const obs = [entry('2026-04-10T00:00:00Z', '2026-04-10T22:00:00Z')];
+        // Exactly 2h remain → 22:00–00:00.
+        const result = findFreeWindowOnDay(obs, DATE, 2 * HOUR, TZ);
+        expect(result?.start).toBe('2026-04-10T22:00:00Z');
+        expect(result?.end).toBe('2026-04-11T00:00:00Z');
+    });
+
+    // ── Pre-existing overlapping obstacles ────────────────────────
+
+    it('merges overlapping obstacles before computing gaps', () => {
+        const obs = [
+            entry('2026-04-10T09:00:00Z', '2026-04-10T11:00:00Z'),
+            entry('2026-04-10T10:00:00Z', '2026-04-10T13:00:00Z'),
+            entry('2026-04-10T15:00:00Z', '2026-04-10T16:00:00Z'),
+        ];
+        // Effective obstacles: [09:00, 13:00) and [15:00, 16:00)
+        // First gap is [00:00, 09:00) = 9h. Asking for 2h → 00:00.
+        const result = findFreeWindowOnDay(obs, DATE, 2 * HOUR, TZ);
+        expect(result?.start).toBe('2026-04-10T00:00:00Z');
+    });
+
+    // ── Day full ──────────────────────────────────────────────────
+
+    it('returns null when no gap is large enough', () => {
+        const obs = [
+            entry('2026-04-10T00:00:00Z', '2026-04-10T11:00:00Z'),
+            entry('2026-04-10T11:30:00Z', '2026-04-10T22:00:00Z'),
+            entry('2026-04-10T22:30:00Z', '2026-04-10T23:30:00Z'),
+        ];
+        // Gaps: 30min, 30min, 30min. Asking for 1h → null.
+        const result = findFreeWindowOnDay(obs, DATE, HOUR, TZ);
+        expect(result).toBeNull();
+    });
+
+    // ── Timezone awareness ────────────────────────────────────────
+
+    it('respects the user timezone for day boundaries', () => {
+        // In Pacific/Auckland (+13 in April 2026), 2026-04-10 starts at
+        // 2026-04-09T11:00:00Z (NZDT was UTC+13 until April 5 2026, then
+        // NZST UTC+12 — let's pick a date in NZST so the offset is +12).
+        // 2026-04-10 NZST = 2026-04-09T12:00:00Z to 2026-04-10T12:00:00Z
+        const tz = 'Pacific/Auckland';
+        const obs = [
+            // This entry is at 2026-04-10T08:00:00Z = 2026-04-10T20:00 NZ
+            // → falls in the NZ day for 2026-04-10. So it blocks from
+            // 20:00 to 21:00 NZ time.
+            entry('2026-04-10T08:00:00Z', '2026-04-10T09:00:00Z'),
+        ];
+        const result = findFreeWindowOnDay(obs, '2026-04-10', HOUR, tz);
+        // Day starts at 2026-04-09T12:00:00Z in NZST. First gap is the
+        // 20h before the obstacle starts.
+        expect(result?.start).toBe('2026-04-09T12:00:00Z');
+    });
+
+    it('does not place work past local midnight on spring-forward days', () => {
+        const tz = 'Europe/Vienna';
+        const obs = [entry('2026-03-28T23:00:00Z', '2026-03-29T22:00:00Z')];
+
+        const result = findFreeWindowOnDay(obs, '2026-03-29', HOUR, tz);
+
+        expect(result).toBeNull();
+    });
+
+    it('can use the final local hour on fall-back days', () => {
+        const tz = 'Europe/Vienna';
+
+        const result = findFreeWindowOnDay([], '2026-10-25', HOUR, tz, '2026-10-25T22:00:00Z');
+
+        expect(result).toEqual({
+            start: '2026-10-25T22:00:00Z',
+            end: '2026-10-25T23:00:00Z',
+        });
+    });
+});
+
+describe('freeGapSecondsAfter', () => {
+    it('returns the rest of the day for an empty day', () => {
+        const result = freeGapSecondsAfter([], DATE, TZ, '2026-04-10T09:00:00Z');
+        // 09:00 → 24:00 = 15 hours
+        expect(result).toBe(15 * HOUR);
+    });
+
+    it('returns 0 when cursor is at end-of-day', () => {
+        const result = freeGapSecondsAfter([], DATE, TZ, '2026-04-11T00:00:00Z');
+        expect(result).toBe(0);
+    });
+
+    it('returns 0 when cursor is after end-of-day', () => {
+        const result = freeGapSecondsAfter([], DATE, TZ, '2026-04-11T05:00:00Z');
+        expect(result).toBe(0);
+    });
+
+    it('returns 0 when cursor is before the day starts', () => {
+        const result = freeGapSecondsAfter([], DATE, TZ, '2026-04-09T23:00:00Z');
+        expect(result).toBe(0);
+    });
+
+    it('returns the gap to the next obstacle', () => {
+        const obs = [entry('2026-04-10T11:00:00Z', '2026-04-10T12:00:00Z')];
+        // cursor 09:00 → next obstacle 11:00 → 2h gap
+        const result = freeGapSecondsAfter(obs, DATE, TZ, '2026-04-10T09:00:00Z');
+        expect(result).toBe(2 * HOUR);
+    });
+
+    it('returns 0 when cursor sits inside an obstacle', () => {
+        const obs = [entry('2026-04-10T08:00:00Z', '2026-04-10T12:00:00Z')];
+        const result = freeGapSecondsAfter(obs, DATE, TZ, '2026-04-10T10:00:00Z');
+        expect(result).toBe(0);
+    });
+
+    it('returns the rest of the day when no obstacle is ahead', () => {
+        const obs = [entry('2026-04-10T08:00:00Z', '2026-04-10T09:00:00Z')];
+        const result = freeGapSecondsAfter(obs, DATE, TZ, '2026-04-10T09:00:00Z');
+        // 09:00 → 24:00 = 15h
+        expect(result).toBe(15 * HOUR);
+    });
+
+    it('skips obstacles strictly before the cursor', () => {
+        const obs = [
+            entry('2026-04-10T08:00:00Z', '2026-04-10T09:00:00Z'),
+            entry('2026-04-10T15:00:00Z', '2026-04-10T16:00:00Z'),
+        ];
+        // cursor 09:00 → first obstacle (08-09) is behind, next is 15:00 → 6h
+        const result = freeGapSecondsAfter(obs, DATE, TZ, '2026-04-10T09:00:00Z');
+        expect(result).toBe(6 * HOUR);
+    });
+
+    it('treats a running entry as blocking up to "now"', () => {
+        const obs = [entry('2026-04-10T08:00:00Z', null)];
+        const now = '2026-04-10T10:00:00Z';
+        // cursor 11:00 is after the running entry's effective end (10:00),
+        // so the gap is the rest of the day = 13h
+        const result = freeGapSecondsAfter(obs, DATE, TZ, '2026-04-10T11:00:00Z', now);
+        expect(result).toBe(13 * HOUR);
+    });
+
+    it('returns 0 when cursor is inside a running entry (cursor < now)', () => {
+        const obs = [entry('2026-04-10T08:00:00Z', null)];
+        const now = '2026-04-10T12:00:00Z';
+        // cursor 10:00 falls inside [08:00, 12:00) → blocked
+        const result = freeGapSecondsAfter(obs, DATE, TZ, '2026-04-10T10:00:00Z', now);
+        expect(result).toBe(0);
+    });
+
+    it('clips the gap to midnight, never beyond', () => {
+        const obs = [entry('2026-04-10T08:00:00Z', '2026-04-10T09:00:00Z')];
+        // cursor 23:00 → 1h until midnight
+        const result = freeGapSecondsAfter(obs, DATE, TZ, '2026-04-10T23:00:00Z');
+        expect(result).toBe(HOUR);
+    });
+
+    it('clips spring-forward days at the next local midnight', () => {
+        const result = freeGapSecondsAfter(
+            [],
+            '2026-03-29',
+            'Europe/Vienna',
+            '2026-03-29T22:00:00Z'
+        );
+
+        expect(result).toBe(0);
+    });
+
+    it('includes the final local hour on fall-back days', () => {
+        const result = freeGapSecondsAfter(
+            [],
+            '2026-10-25',
+            'Europe/Vienna',
+            '2026-10-25T22:00:00Z'
+        );
+
+        expect(result).toBe(HOUR);
+    });
+});
+
+describe('NoFreeWindowError', () => {
+    it('carries the date and required seconds', () => {
+        const err = new NoFreeWindowError('2026-04-10', 7200);
+        expect(err.code).toBe('no_free_window');
+        expect(err.date).toBe('2026-04-10');
+        expect(err.requiredSeconds).toBe(7200);
+        expect(err.message).toContain('2026-04-10');
+        expect(err instanceof Error).toBe(true);
+    });
+});

resources/js/utils/timesheet/cellMath.ts

@@ -0,0 +1,212 @@
+import { type Dayjs } from 'dayjs';
+import type { TimeEntry } from '@/packages/api/src';
+import { getDayJsInstance } from '@/packages/ui/src/utils/time';
+
+// `getDayJsInstance()` reads window-injected settings (week-start), which
+// aren't available at module load. Each function calls it lazily at use
+// time. The cost is a per-call locale update; cellMath doesn't use any
+// week-start-aware APIs so it's a no-op functionally.
+
+/**
+ * UTC ISO of 09:00 local on `date` — the preferred placement for new
+ * work when an empty day needs a default start time.
+ */
+export function workDayStartOn(date: string, tz: string): string {
+    const dayjs = getDayJsInstance();
+    return dayjs.tz(`${date} 09:00:00`, tz).utc().format();
+}
+
+export interface FreeWindow {
+    start: string;
+    end: string;
+}
+
+interface Interval {
+    start: Dayjs;
+    end: Dayjs;
+}
+
+function localDayBounds(date: string, tz: string): { dayStart: Dayjs; dayEnd: Dayjs } {
+    const dayjs = getDayJsInstance();
+    // `.add(1, 'day')` on a Dayjs instance advances by a fixed 24h, which is
+    // wrong on DST-transition days (the local day is 23h or 25h long). Derive
+    // the next calendar date in UTC (no DST) and take its local midnight, so
+    // `dayEnd` is always the real next local midnight.
+    const nextDate = dayjs.utc(date).add(1, 'day').format('YYYY-MM-DD');
+    return {
+        dayStart: dayjs.tz(`${date} 00:00:00`, tz).utc(),
+        dayEnd: dayjs.tz(`${nextDate} 00:00:00`, tz).utc(),
+    };
+}
+
+/**
+ * Collect entries that intersect the day `[dayStart, dayEnd)`, clipped
+ * to those bounds. Running entries use `nowDayjs` as their end.
+ */
+function collectDayObstacles(
+    entries: TimeEntry[],
+    dayStart: Dayjs,
+    dayEnd: Dayjs,
+    nowDayjs: Dayjs
+): Interval[] {
+    const dayjs = getDayJsInstance();
+    const obstacles: Interval[] = [];
+    for (const entry of entries) {
+        const entryStart = dayjs.utc(entry.start);
+        const entryEnd = entry.end ? dayjs.utc(entry.end) : nowDayjs;
+
+        if (entryEnd.isSameOrBefore(dayStart)) continue;
+        if (entryStart.isSameOrAfter(dayEnd)) continue;
+
+        const clippedStart = entryStart.isBefore(dayStart) ? dayStart : entryStart;
+        const clippedEnd = entryEnd.isAfter(dayEnd) ? dayEnd : entryEnd;
+
+        obstacles.push({ start: clippedStart, end: clippedEnd });
+    }
+    return obstacles;
+}
+
+/**
+ * First free window on the local calendar day that fits `requiredSeconds`
+ * without colliding with any existing entry. Returns `null` if nothing fits
+ * — never crosses midnight.
+ *
+ * Obstacles include same-day entries, spillovers from adjacent days, and
+ * running entries (treated as `end = now`). All are clipped to the day's
+ * `[00:00, 24:00)` boundaries.
+ *
+ * `preferredStart` (UTC ISO) is a hard floor — windows with `start` before
+ * it are rejected. Use it to place "after some cursor."
+ */
+export function findFreeWindowOnDay(
+    entries: TimeEntry[],
+    date: string,
+    requiredSeconds: number,
+    tz: string,
+    preferredStart?: string | null,
+    now?: string | Dayjs
+): FreeWindow | null {
+    if (requiredSeconds <= 0) return null;
+
+    const dayjs = getDayJsInstance();
+    const { dayStart, dayEnd } = localDayBounds(date, tz);
+
+    if (requiredSeconds > dayEnd.diff(dayStart, 'second')) return null;
+
+    const nowDayjs = now ? dayjs.utc(now) : dayjs.utc();
+
+    const obstacles = collectDayObstacles(entries, dayStart, dayEnd, nowDayjs);
+
+    // Sort + merge so we can walk a clean [gap, obstacle, gap, ...] sequence.
+    obstacles.sort((a, b) => a.start.diff(b.start));
+
+    // merge overlaps
+    const merged: Interval[] = [];
+    for (const obs of obstacles) {
+        const last = merged[merged.length - 1];
+        if (last && obs.start.isSameOrBefore(last.end)) {
+            if (obs.end.isAfter(last.end)) {
+                last.end = obs.end;
+            }
+        } else {
+            merged.push({ start: obs.start, end: obs.end });
+        }
+    }
+
+    let cursor: Dayjs = dayStart;
+    if (preferredStart) {
+        const pref = dayjs.utc(preferredStart);
+        if (pref.isAfter(cursor)) cursor = pref;
+    }
+    if (cursor.isSameOrAfter(dayEnd)) return null;
+
+    for (const obs of merged) {
+        if (obs.end.isSameOrBefore(cursor)) continue;
+
+        if (obs.start.isAfter(cursor)) {
+            const gapSeconds = obs.start.diff(cursor, 'second');
+            if (gapSeconds >= requiredSeconds) {
+                return {
+                    start: cursor.format(),
+                    end: cursor.add(requiredSeconds, 'second').format(),
+                };
+            }
+        }
+
+        if (obs.end.isAfter(cursor)) cursor = obs.end;
+        if (cursor.isSameOrAfter(dayEnd)) return null;
+    }
+
+    const trailingSeconds = dayEnd.diff(cursor, 'second');
+    if (trailingSeconds >= requiredSeconds) {
+        return {
+            start: cursor.format(),
+            end: cursor.add(requiredSeconds, 'second').format(),
+        };
+    }
+
+    return null;
+}
+
+/**
+ * Seconds of free space starting at `cursor` until the next obstacle
+ * (or end of day). Returns 0 if the cursor is inside an obstacle or past
+ * midnight. Used by the extend path: "how far can I push this end forward?"
+ */
+export function freeGapSecondsAfter(
+    entries: TimeEntry[],
+    date: string,
+    tz: string,
+    cursor: string,
+    now?: string | Dayjs
+): number {
+    const dayjs = getDayJsInstance();
+    const { dayStart, dayEnd } = localDayBounds(date, tz);
+    const cursorDjs = dayjs.utc(cursor);
+
+    if (cursorDjs.isSameOrAfter(dayEnd)) return 0;
+    if (cursorDjs.isBefore(dayStart)) return 0;
+
+    const nowDayjs = now ? dayjs.utc(now) : dayjs.utc();
+
+    // Drop obstacles ending at/before the cursor — they're behind us.
+    const obstacles = collectDayObstacles(entries, dayStart, dayEnd, nowDayjs).filter((obs) =>
+        obs.end.isAfter(cursorDjs)
+    );
+
+    obstacles.sort((a, b) => a.start.diff(b.start));
+
+    // Cursor inside an obstacle → no gap.
+    for (const obs of obstacles) {
+        if (obs.start.isSameOrBefore(cursorDjs) && obs.end.isAfter(cursorDjs)) {
+            return 0;
+        }
+    }
+
+    // Distance to first obstacle strictly after cursor, or to end of day.
+    for (const obs of obstacles) {
+        if (obs.start.isAfter(cursorDjs)) {
+            return Math.max(0, obs.start.diff(cursorDjs, 'second'));
+        }
+    }
+    return Math.max(0, dayEnd.diff(cursorDjs, 'second'));
+}
+
+/**
+ * Thrown when a required duration cannot fit on the target day without
+ * introducing an overlap. Callers reformat the message for end users.
+ */
+export class NoFreeWindowError extends Error {
+    public readonly code = 'no_free_window' as const;
+    public readonly date: string;
+    public readonly requiredSeconds: number;
+
+    constructor(date: string, requiredSeconds: number) {
+        super(
+            `Cannot fit ${requiredSeconds} seconds on ${date} without overlapping existing time entries.`
+        );
+        this.name = 'NoFreeWindowError';
+        this.date = date;
+        this.requiredSeconds = requiredSeconds;
+    }
+}

resources/js/utils/timesheet/useCopyLastWeek.ts

@@ -0,0 +1,242 @@
+import { ref, type Ref } from 'vue';
+import type { Dayjs } from 'dayjs';
+import axios from 'axios';
+import { useQueryClient } from '@tanstack/vue-query';
+import {
+    api,
+    type CreateTimeEntryBody,
+    type TimeEntry,
+    type TimeEntryResponse,
+} from '@/packages/api/src';
+import {
+    getDayJsInstance,
+    getLocalizedDateFromTimestamp,
+    localDateToUtc,
+} from '@/packages/ui/src/utils/time';
+import { getUserTimezone } from '@/packages/ui/src/utils/settings';
+import { fetchTimesheetEntries } from '@/utils/useTimesheetQuery';
+import { getCurrentMembershipId, getCurrentOrganizationId } from '@/utils/useUser';
+import { makeRowKey, type TimesheetRow } from '@/utils/useTimesheetGrid';
+import { useNotificationsStore } from '@/utils/notification';
+import { findFreeWindowOnDay, workDayStartOn } from './cellMath';
+
+/**
+ * Implements both variants of "Copy last week":
+ *
+ *   - `copyLastWeekRows()`       — only add rows for each distinct
+ *                                   (project, task) pair from last week
+ *                                   that doesn't already exist
+ *   - `copyLastWeekWithTime()`   — same, but also duplicates each
+ *                                   previous-week entry into the same
+ *                                   day-of-week in the current week,
+ *                                   stacking copies after any existing
+ *                                   work on that day
+ */
+export function useCopyLastWeek(
+    weekStart: Ref<Dayjs>,
+    weekDays: Ref<string[]>,
+    rows: Ref<TimesheetRow[]>,
+    timeEntries: Ref<TimeEntry[]>,
+    addSlot: (
+        projectId: string | null,
+        taskId: string | null,
+        billable: boolean,
+        tags: string[]
+    ) => string
+) {
+    const dayjs = getDayJsInstance();
+    const queryClient = useQueryClient();
+    const { addNotification } = useNotificationsStore();
+
+    const isCopyingLastWeek = ref(false);
+
+    async function fetchLastWeekEntries(): Promise<TimeEntryResponse | null> {
+        const prevStart = weekStart.value.subtract(7, 'day');
+        const prevEnd = weekStart.value;
+
+        const orgId = getCurrentOrganizationId();
+        const memberId = getCurrentMembershipId();
+        if (!orgId) return null;
+
+        return await fetchTimesheetEntries(
+            orgId,
+            memberId,
+            localDateToUtc(prevStart),
+            localDateToUtc(prevEnd)
+        );
+    }
+
+    /**
+     * For every entry in `prevEntries`, if the current week doesn't
+     * already have a row for that (project, task) combination, add one.
+     * Deduplicates so each combination is added at most once.
+     */
+    function addMissingRowsFromPreviousWeek(prevEntries: TimeEntry[]): void {
+        const existingIdentities = new Set(
+            rows.value.map((r) => makeRowKey(r.projectId, r.taskId, r.billable, r.tags))
+        );
+        const addedIdentities = new Set<string>();
+
+        for (const entry of prevEntries) {
+            const tags = entry.tags ?? [];
+            const identity = makeRowKey(entry.project_id, entry.task_id, entry.billable, tags);
+            if (!existingIdentities.has(identity) && !addedIdentities.has(identity)) {
+                addedIdentities.add(identity);
+                addSlot(entry.project_id, entry.task_id, entry.billable, tags);
+            }
+        }
+    }
+
+    async function copyLastWeekRows(): Promise<void> {
+        isCopyingLastWeek.value = true;
+        try {
+            const prev = await fetchLastWeekEntries();
+            if (!prev) return;
+            addMissingRowsFromPreviousWeek(prev.data);
+        } finally {
+            isCopyingLastWeek.value = false;
+        }
+    }
+
+    async function copyLastWeekWithTime(): Promise<void> {
+        isCopyingLastWeek.value = true;
+        try {
+            const prev = await fetchLastWeekEntries();
+            if (!prev) return;
+
+            const orgId = getCurrentOrganizationId();
+            const memberId = getCurrentMembershipId();
+            if (!orgId || !memberId) return;
+
+            const tz = getUserTimezone();
+
+            addMissingRowsFromPreviousWeek(prev.data);
+
+            const prevWeekStart = weekStart.value.subtract(7, 'day');
+
+            // Working copy of the current week's entries; placed copies
+            // are appended so subsequent placement queries see them as
+            // obstacles (timeEntries.value isn't refreshed until the
+            // queryClient.invalidate at the end of the loop).
+            const workingEntries: TimeEntry[] = [...timeEntries.value];
+
+            let attempted = 0;
+            let succeeded = 0;
+            let overlapFailures = 0;
+            let otherFailures = 0;
+
+            for (const entry of prev.data) {
+                if (!entry.end || !entry.duration) continue;
+
+                // Map previous-week date → same day-of-week in current week.
+                const entryDate = getLocalizedDateFromTimestamp(entry.start);
+                const dayOffset = dayjs(entryDate).diff(prevWeekStart, 'day');
+                const newDate = weekDays.value[dayOffset];
+                if (!newDate) continue;
+
+                // Try the source's wall-clock time on the target day first
+                // (preserves "Monday 14:00 meeting" → "Monday 14:00 meeting"
+                // when the slot is free); fall back to 09:00, then to
+                // anywhere on the day.
+                const sourceTimeOfDay = dayjs.utc(entry.start).tz(tz).format('HH:mm:ss');
+                const sourceStartOnTarget = dayjs
+                    .tz(`${newDate} ${sourceTimeOfDay}`, tz)
+                    .utc()
+                    .format();
+
+                const window =
+                    findFreeWindowOnDay(
+                        workingEntries,
+                        newDate,
+                        entry.duration,
+                        tz,
+                        sourceStartOnTarget
+                    ) ??
+                    findFreeWindowOnDay(
+                        workingEntries,
+                        newDate,
+                        entry.duration,
+                        tz,
+                        workDayStartOn(newDate, tz)
+                    ) ??
+                    findFreeWindowOnDay(workingEntries, newDate, entry.duration, tz);
+
+                if (!window) {
+                    attempted++;
+                    otherFailures++;
+                    continue;
+                }
+
+                const body: CreateTimeEntryBody = {
+                    member_id: memberId,
+                    project_id: entry.project_id,
+                    task_id: entry.task_id,
+                    start: window.start,
+                    end: window.end,
+                    billable: entry.billable,
+                    description: entry.description ?? null,
+                    tags: entry.tags ?? [],
+                };
+
+                attempted++;
+                try {
+                    await api.createTimeEntry(body, { params: { organization: orgId } });
+                    succeeded++;
+                    workingEntries.push({
+                        start: window.start,
+                        end: window.end,
+                    } as TimeEntry);
+                } catch (error) {
+                    if (
+                        axios.isAxiosError(error) &&
+                        error.response?.data?.key === 'overlapping_time_entry'
+                    ) {
+                        overlapFailures++;
+                    } else {
+                        otherFailures++;
+                    }
+                }
+            }
+
+            queryClient.invalidateQueries({ queryKey: ['timeEntries'] });
+
+            if (attempted === 0) return;
+
+            if (succeeded === attempted) {
+                addNotification(
+                    'success',
+                    `Copied ${succeeded} ${succeeded === 1 ? 'entry' : 'entries'} from last week`
+                );
+            } else if (succeeded > 0) {
+                const skipped = overlapFailures + otherFailures;
+                const detail =
+                    overlapFailures > 0 && otherFailures === 0
+                        ? `${overlapFailures} overlapping`
+                        : otherFailures > 0 && overlapFailures === 0
+                          ? `${otherFailures} failed`
+                          : `${skipped} skipped`;
+                addNotification(
+                    'error',
+                    `Copied ${succeeded} of ${attempted} entries from last week`,
+                    `${detail}.`
+                );
+            } else {
+                addNotification(
+                    'error',
+                    'Failed to copy entries from last week',
+                    overlapFailures > 0 && otherFailures === 0
+                        ? 'All entries would overlap with existing time entries.'
+                        : 'Please try again later.'
+                );
+            }
+        } finally {
+            isCopyingLastWeek.value = false;
+        }
+    }
+
+    return {
+        isCopyingLastWeek,
+        copyLastWeekRows,
+        copyLastWeekWithTime,
+    };
+}

resources/js/utils/timesheet/useTimesheetCellMutations.test.ts

@@ -0,0 +1,551 @@
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import { ref } from 'vue';
+import { createPinia, setActivePinia } from 'pinia';
+import { useTimesheetCellMutations } from './useTimesheetCellMutations';
+import { api } from '@/packages/api/src';
+import type { TimesheetRow, TimesheetCell } from '@/utils/useTimesheetGrid';
+import type { TimeEntry } from '@/packages/api/src';
+
+const addNotification = vi.fn();
+
+vi.mock('@/utils/useUser', () => ({
+    getCurrentOrganizationId: vi.fn(() => 'org-1'),
+    getCurrentMembershipId: vi.fn(() => 'mem-1'),
+}));
+
+vi.mock('@tanstack/vue-query', () => ({
+    useQueryClient: () => ({
+        invalidateQueries: vi.fn(),
+    }),
+}));
+
+vi.mock('@/utils/notification', () => ({
+    useNotificationsStore: () => ({
+        addNotification,
+    }),
+}));
+
+vi.mock('@/packages/api/src', () => ({
+    api: {
+        createTimeEntry: vi.fn(async () => ({ data: { id: 'new-id' } })),
+        updateTimeEntry: vi.fn(async () => undefined),
+        deleteTimeEntry: vi.fn(async () => undefined),
+        deleteTimeEntries: vi.fn(async () => undefined),
+    },
+}));
+
+// All scenarios use UTC so the local "day" matches the UTC day exactly
+// (the test-setup mocks getTimezoneSetting to return 'UTC').
+
+const DATE = '2026-04-10';
+const HOUR = 3600;
+
+function entry(start: string, end: string | null, overrides: Partial<TimeEntry> = {}): TimeEntry {
+    const startMs = new Date(start).valueOf();
+    const endMs = end ? new Date(end).valueOf() : startMs;
+    return {
+        id: overrides.id ?? `e-${start}-${end ?? 'running'}`,
+        start,
+        end,
+        duration: end ? Math.floor((endMs - startMs) / 1000) : null,
+        description: '',
+        member_id: 'm-1',
+        project_id: 'p-1',
+        task_id: null,
+        billable: false,
+        tags: [],
+        ...overrides,
+    } as unknown as TimeEntry;
+}
+
+function buildCell(entries: TimeEntry[]): TimesheetCell {
+    return {
+        dayIndex: 0,
+        date: DATE,
+        entries,
+        totalSeconds: entries.reduce((sum, e) => sum + (e.duration ?? 0), 0),
+    };
+}
+
+function buildRow(
+    projectId: string | null,
+    entries: TimeEntry[],
+    key = `${projectId}:null`
+): TimesheetRow {
+    const cell = buildCell(entries);
+    return {
+        key,
+        projectId,
+        taskId: null,
+        billable: false,
+        tags: [],
+        cells: new Map([[0, cell]]),
+        totalSeconds: cell.totalSeconds,
+    };
+}
+
+function buildEmptyRow(projectId: string | null, key = `${projectId}:null`): TimesheetRow {
+    return {
+        key,
+        projectId,
+        taskId: null,
+        billable: false,
+        tags: [],
+        cells: new Map(),
+        totalSeconds: 0,
+    };
+}
+
+/** Shape of the body the cell-mutation logic passes to api.createTimeEntry. */
+interface CapturedEntry {
+    id?: string;
+    start: string;
+    end: string | null;
+    project_id?: string | null;
+    task_id?: string | null;
+    description?: string | null;
+}
+
+const apiMocks = vi.mocked(api);
+
+function firstArg(
+    mock: typeof apiMocks.createTimeEntry | typeof apiMocks.updateTimeEntry
+): CapturedEntry {
+    return mock.mock.calls[0]?.[0] as unknown as CapturedEntry;
+}
+
+function setup(
+    allEntries: TimeEntry[],
+    rowsValue: TimesheetRow[] = [],
+    removeSlot: (key: string) => void = () => undefined
+) {
+    const cellMutations = useTimesheetCellMutations(
+        ref([
+            DATE,
+            '2026-04-11',
+            '2026-04-12',
+            '2026-04-13',
+            '2026-04-14',
+            '2026-04-15',
+            '2026-04-16',
+        ]),
+        ref(allEntries),
+        ref(rowsValue),
+        removeSlot
+    );
+
+    return { cellMutations };
+}
+
+beforeEach(() => {
+    setActivePinia(createPinia());
+    apiMocks.createTimeEntry.mockClear();
+    apiMocks.updateTimeEntry.mockClear();
+    apiMocks.deleteTimeEntry.mockClear();
+    apiMocks.deleteTimeEntries.mockClear();
+    addNotification.mockClear();
+    // Lock the clock to mid-afternoon on the test day so running-entry
+    // tests have a deterministic "now". Past 12:00 to make spillover
+    // scenarios meaningful.
+    vi.useFakeTimers();
+    vi.setSystemTime(new Date('2026-04-10T14:00:00Z'));
+});
+
+afterEach(() => {
+    vi.useRealTimers();
+});
+
+describe('useTimesheetCellMutations.handleCellUpdate', () => {
+    // ── No-op ─────────────────────────────────────────────────────
+
+    it('does nothing when the diff is zero', async () => {
+        const { cellMutations } = setup([]);
+        const row = buildRow('p-1', [entry('2026-04-10T09:00:00Z', '2026-04-10T10:00:00Z')]);
+        await cellMutations.handleCellUpdate(row, 0, HOUR);
+
+        expect(apiMocks.createTimeEntry).not.toHaveBeenCalled();
+        expect(apiMocks.updateTimeEntry).not.toHaveBeenCalled();
+        expect(apiMocks.deleteTimeEntry).not.toHaveBeenCalled();
+        expect(apiMocks.deleteTimeEntries).not.toHaveBeenCalled();
+    });
+
+    // ── Delete cell ───────────────────────────────────────────────
+
+    it('clearing a cell deletes all entries in it', async () => {
+        const cellEntry = entry('2026-04-10T09:00:00Z', '2026-04-10T10:00:00Z');
+        const { cellMutations } = setup([cellEntry]);
+        const row = buildRow('p-1', [cellEntry]);
+
+        await cellMutations.handleCellUpdate(row, 0, 0);
+
+        expect(apiMocks.deleteTimeEntries).toHaveBeenCalledTimes(1);
+        const [, options] = apiMocks.deleteTimeEntries.mock.calls[0]!;
+        expect(options?.queries?.ids).toEqual([cellEntry.id]);
+        expect(options?.params?.organization).toBe('org-1');
+    });
+
+    // ── Create cell (Phase 1) ──────────────────────────────────────
+
+    describe('createCell', () => {
+        it('places a new entry at 09:00 on an empty day', async () => {
+            const { cellMutations } = setup([]);
+            const row = buildEmptyRow('p-1');
+
+            await cellMutations.handleCellUpdate(row, 0, HOUR);
+
+            expect(apiMocks.createTimeEntry).toHaveBeenCalledTimes(1);
+            const arg = firstArg(apiMocks.createTimeEntry);
+            expect(arg.start).toBe('2026-04-10T09:00:00Z');
+            expect(arg.end).toBe('2026-04-10T10:00:00Z');
+            expect(arg.project_id).toBe('p-1');
+        });
+
+        it('passes no-project rows to the API as null', async () => {
+            const { cellMutations } = setup([]);
+            const row = buildEmptyRow(null);
+
+            await cellMutations.handleCellUpdate(row, 0, HOUR);
+
+            expect(apiMocks.createTimeEntry).toHaveBeenCalledTimes(1);
+            expect(firstArg(apiMocks.createTimeEntry).project_id).toBeNull();
+        });
+
+        it('collapses an empty duplicate row after its first entry is created', async () => {
+            const removeSlot = vi.fn();
+            const existingRow = buildEmptyRow('p-1', 'existing-slot');
+            const duplicateRow = buildEmptyRow('p-1', 'duplicate-slot');
+            const { cellMutations } = setup([], [existingRow, duplicateRow], removeSlot);
+
+            await cellMutations.handleCellUpdate(duplicateRow, 0, HOUR);
+
+            expect(apiMocks.createTimeEntry).toHaveBeenCalledTimes(1);
+            expect(removeSlot).toHaveBeenCalledWith('duplicate-slot');
+            expect(addNotification).toHaveBeenCalledWith(
+                'success',
+                'Merged into matching row',
+                'Another row with the same project, task, billable status and tags already exists.'
+            );
+        });
+
+        it("falls back to the start of the day when 09:00 wouldn't fit", async () => {
+            // Block 09:00 → 23:30 with another row's entry. The only
+            // gap big enough for 1h is 00:00 → 09:00.
+            const blocker = entry('2026-04-10T09:00:00Z', '2026-04-10T23:30:00Z', {
+                id: 'blocker',
+            });
+            const { cellMutations } = setup([blocker]);
+            const row = buildEmptyRow('p-1');
+
+            await cellMutations.handleCellUpdate(row, 0, HOUR);
+
+            expect(apiMocks.createTimeEntry).toHaveBeenCalledTimes(1);
+            const arg = firstArg(apiMocks.createTimeEntry);
+            expect(arg.start).toBe('2026-04-10T00:00:00Z');
+            expect(arg.end).toBe('2026-04-10T01:00:00Z');
+        });
+
+        it('avoids overlapping with another row on the same day (Scenario #4)', async () => {
+            // Another row has an entry 09:00 → 10:00. The new entry must
+            // not overlap it.
+            const blocker = entry('2026-04-10T09:00:00Z', '2026-04-10T10:00:00Z', {
+                id: 'blocker',
+            });
+            const { cellMutations } = setup([blocker]);
+            const row = buildEmptyRow('p-1');
+
+            await cellMutations.handleCellUpdate(row, 0, HOUR);
+
+            const arg = firstArg(apiMocks.createTimeEntry);
+            // 09:00 is blocked → must place after, at 10:00
+            expect(arg.start).toBe('2026-04-10T10:00:00Z');
+            expect(arg.end).toBe('2026-04-10T11:00:00Z');
+        });
+
+        it('treats a running entry as a blocker (Scenario #1)', async () => {
+            const running = entry('2026-04-10T08:00:00Z', null, { id: 'running' });
+            const { cellMutations } = setup([running]);
+            const row = buildEmptyRow('p-1');
+
+            await cellMutations.handleCellUpdate(row, 0, HOUR);
+
+            const arg = firstArg(apiMocks.createTimeEntry);
+            // The running entry blocks [08:00, now=14:00). The 09:00
+            // work-hours default lands inside that block, so the
+            // search advances the cursor to 14:00 and places the new
+            // entry at 14:00 → 15:00. Critically, this does NOT
+            // overlap the running timer.
+            expect(arg.start).toBe('2026-04-10T14:00:00Z');
+            expect(arg.end).toBe('2026-04-10T15:00:00Z');
+        });
+
+        it('avoids spillover from the previous day (Scenario #2)', async () => {
+            // An entry from yesterday spills into today's first 4h.
+            const spillover = entry('2026-04-09T22:00:00Z', '2026-04-10T04:00:00Z', {
+                id: 'spillover',
+            });
+            const { cellMutations } = setup([spillover]);
+            const row = buildEmptyRow('p-1');
+
+            await cellMutations.handleCellUpdate(row, 0, HOUR);
+
+            const arg = firstArg(apiMocks.createTimeEntry);
+            // 09:00 is free (the spillover ends at 04:00).
+            expect(arg.start).toBe('2026-04-10T09:00:00Z');
+        });
+
+        it('refuses to cross midnight (Scenario #3)', async () => {
+            // Block all of the day except the last 2h. Asking for 3h
+            // → no single-day window fits → notification, no API call.
+            const blocker = entry('2026-04-10T00:00:00Z', '2026-04-10T22:00:00Z', {
+                id: 'blocker',
+            });
+            const { cellMutations } = setup([blocker]);
+            const row = buildEmptyRow('p-1');
+
+            await cellMutations.handleCellUpdate(row, 0, 3 * HOUR);
+
+            expect(apiMocks.createTimeEntry).not.toHaveBeenCalled();
+        });
+    });
+
+    // ── Extend cell (Phase 2) ──────────────────────────────────────
+
+    describe('extendCell', () => {
+        it("extends the cell's latest-ended entry forward when there is room", async () => {
+            const cellEntry = entry('2026-04-10T09:00:00Z', '2026-04-10T10:00:00Z', {
+                id: 'extend-me',
+            });
+            const { cellMutations } = setup([cellEntry]);
+            const row = buildRow('p-1', [cellEntry]);
+
+            // Cell is 1h, request 2h total → +1h
+            await cellMutations.handleCellUpdate(row, 0, 2 * HOUR);
+
+            expect(apiMocks.updateTimeEntry).toHaveBeenCalledTimes(1);
+            const updated = firstArg(apiMocks.updateTimeEntry);
+            expect(updated.id).toBe('extend-me');
+            expect(updated.end).toBe('2026-04-10T11:00:00Z');
+            expect(apiMocks.createTimeEntry).not.toHaveBeenCalled();
+        });
+
+        it('picks the latest-END entry when nested entries exist (Scenario #6)', async () => {
+            // Outer entry 09:00 → 12:00, inner entry 10:00 → 11:00.
+            // The latest START is "inner" but the latest END is "outer".
+            // Extending should grow the OUTER entry, not the inner.
+            const outer = entry('2026-04-10T09:00:00Z', '2026-04-10T12:00:00Z', { id: 'outer' });
+            const inner = entry('2026-04-10T10:00:00Z', '2026-04-10T11:00:00Z', { id: 'inner' });
+            const { cellMutations } = setup([outer, inner]);
+            const row = buildRow('p-1', [outer, inner]);
+
+            // Cell total = 3h + 1h = 4h. Bump to 5h → +1h.
+            await cellMutations.handleCellUpdate(row, 0, 5 * HOUR);
+
+            expect(apiMocks.updateTimeEntry).toHaveBeenCalledTimes(1);
+            const updated = firstArg(apiMocks.updateTimeEntry);
+            expect(updated.id).toBe('outer');
+            expect(updated.end).toBe('2026-04-10T13:00:00Z');
+        });
+
+        it('splits the extension when another row blocks the path (Scenario #5)', async () => {
+            // Cell entry: 09:00 → 10:00 (1h). Blocker on another row:
+            // 10:30 → 11:30. Bump cell to 3h (+2h):
+            //   - 30 minutes fit in the gap [10:00, 10:30) → extend to 10:30
+            //   - 90 minutes remain → place a NEW entry in the next free
+            //     window (11:30 → 13:00)
+            const cellEntry = entry('2026-04-10T09:00:00Z', '2026-04-10T10:00:00Z', {
+                id: 'cell-entry',
+            });
+            const blocker = entry('2026-04-10T10:30:00Z', '2026-04-10T11:30:00Z', {
+                id: 'blocker',
+                project_id: 'other-project',
+            });
+            const { cellMutations } = setup([cellEntry, blocker]);
+            const row = buildRow('p-1', [cellEntry]);
+
+            await cellMutations.handleCellUpdate(row, 0, 3 * HOUR);
+
+            expect(apiMocks.updateTimeEntry).toHaveBeenCalledTimes(1);
+            const updated = firstArg(apiMocks.updateTimeEntry);
+            expect(updated.id).toBe('cell-entry');
+            expect(updated.end).toBe('2026-04-10T10:30:00Z');
+
+            expect(apiMocks.createTimeEntry).toHaveBeenCalledTimes(1);
+            const created = firstArg(apiMocks.createTimeEntry);
+            // Remainder = 2h - 30min = 90min, placed in next free window
+            // (11:30 → 13:00)
+            expect(created.start).toBe('2026-04-10T11:30:00Z');
+            expect(created.end).toBe('2026-04-10T13:00:00Z');
+        });
+
+        it("places everything as a new entry when the cell's tail abuts another row immediately (Scenario #5 zero-gap)", async () => {
+            // Cell entry: 09:00 → 10:00. Another row starts EXACTLY at 10:00.
+            // Gap after cell entry = 0. The whole add becomes a new entry
+            // somewhere else.
+            const cellEntry = entry('2026-04-10T09:00:00Z', '2026-04-10T10:00:00Z', {
+                id: 'cell-entry',
+            });
+            const blocker = entry('2026-04-10T10:00:00Z', '2026-04-10T11:00:00Z', {
+                id: 'blocker',
+                project_id: 'other-project',
+            });
+            const { cellMutations } = setup([cellEntry, blocker]);
+            const row = buildRow('p-1', [cellEntry]);
+
+            // Bump cell from 1h to 2h → +1h
+            await cellMutations.handleCellUpdate(row, 0, 2 * HOUR);
+
+            // No update to cell entry (gap is zero)
+            expect(apiMocks.updateTimeEntry).not.toHaveBeenCalled();
+            // New entry placed in next free window: 11:00 → 12:00
+            expect(apiMocks.createTimeEntry).toHaveBeenCalledTimes(1);
+            const created = firstArg(apiMocks.createTimeEntry);
+            expect(created.start).toBe('2026-04-10T11:00:00Z');
+            expect(created.end).toBe('2026-04-10T12:00:00Z');
+        });
+
+        it('falls back to creating a new entry when the latest cell entry is running (Scenario #8)', async () => {
+            // Cell contains only a running timer.
+            const running = entry('2026-04-10T08:00:00Z', null, {
+                id: 'running',
+                duration: null,
+            });
+            // The grid would treat the cell total as 0 because duration is
+            // null, so we fake a non-zero totalSeconds via a manual cell.
+            const cell: TimesheetCell = {
+                dayIndex: 0,
+                date: DATE,
+                entries: [running],
+                // Pretend we computed 1h so that handleCellUpdate sees a
+                // diff > 0 and routes through extendCell rather than
+                // createCell.
+                totalSeconds: HOUR,
+            };
+            const row: TimesheetRow = {
+                key: 'p-1:null',
+                projectId: 'p-1',
+                taskId: null,
+                billable: false,
+                tags: [],
+                cells: new Map([[0, cell]]),
+                totalSeconds: HOUR,
+            };
+
+            const { cellMutations } = setup([running]);
+            // Bump from 1h to 2h → +1h. extendCell sees the running entry
+            // as the latest-end and falls through to createCell.
+            await cellMutations.handleCellUpdate(row, 0, 2 * HOUR);
+
+            expect(apiMocks.updateTimeEntry).not.toHaveBeenCalled();
+            expect(apiMocks.createTimeEntry).toHaveBeenCalledTimes(1);
+            // Running entry blocks [08:00, now=14:00). 09:00 lands inside
+            // → cursor advances to 14:00. Crucially the running entry is
+            // never modified.
+            const created = firstArg(apiMocks.createTimeEntry);
+            expect(created.start).toBe('2026-04-10T14:00:00Z');
+            expect(created.end).toBe('2026-04-10T15:00:00Z');
+        });
+
+        it('places the remainder strictly after the just-extended end (no stale-overlap)', async () => {
+            // Regression: timeEntries.value is stale right after the
+            // updateEntry call (still shows candidate.end at the old
+            // value). Without an explicit floor, findFreeWindowOnDay
+            // would propose a window inside the gap we just filled —
+            // overlapping the now-extended candidate.
+            //
+            // Cell entry: 09:00 → 10:00 (1h). Blocker on another row at
+            // 11:00 → 12:00. Gap is 1h. Bump cell to 2.5h (+1.5h):
+            //   - extend by 1h → newEnd = 11:00
+            //   - remainder = 30 min must land AFTER 11:00, not in the
+            //     stale-looking [10:00, 11:00] window.
+            const cellEntry = entry('2026-04-10T09:00:00Z', '2026-04-10T10:00:00Z', {
+                id: 'cell-entry',
+            });
+            const blocker = entry('2026-04-10T11:00:00Z', '2026-04-10T12:00:00Z', {
+                id: 'blocker',
+                project_id: 'other-project',
+            });
+            const { cellMutations } = setup([cellEntry, blocker]);
+            const row = buildRow('p-1', [cellEntry]);
+
+            await cellMutations.handleCellUpdate(row, 0, Math.round(2.5 * HOUR));
+
+            expect(apiMocks.updateTimeEntry).toHaveBeenCalledTimes(1);
+            const updated = firstArg(apiMocks.updateTimeEntry);
+            expect(updated.id).toBe('cell-entry');
+            expect(updated.end).toBe('2026-04-10T11:00:00Z');
+
+            expect(apiMocks.createTimeEntry).toHaveBeenCalledTimes(1);
+            const created = firstArg(apiMocks.createTimeEntry);
+            // Next free window after blocker, at 12:00.
+            expect(created.start).toBe('2026-04-10T12:00:00Z');
+            expect(created.end).toBe('2026-04-10T12:30:00Z');
+        });
+
+        it('refuses extension that would cross midnight before patching the server (Scenario #7)', async () => {
+            // Cell entry 22:00 → 23:00. Bump to 4h (+3h). Only 1h is
+            // available before midnight. Because the remaining 2h don't
+            // fit anywhere else on the day, the mutation now aborts
+            // before issuing the PATCH, leaving the entry untouched.
+            const cellEntry = entry('2026-04-10T22:00:00Z', '2026-04-10T23:00:00Z', {
+                id: 'cell-entry',
+            });
+            const fillEarly = entry('2026-04-10T00:00:00Z', '2026-04-10T22:00:00Z', {
+                id: 'fill',
+                project_id: 'other-project',
+            });
+            const { cellMutations } = setup([cellEntry, fillEarly]);
+            const row = buildRow('p-1', [cellEntry]);
+
+            // Bump from 1h to 4h → +3h
+            await cellMutations.handleCellUpdate(row, 0, 4 * HOUR);
+
+            // Nothing should be patched or created because the preflight
+            // fit-check rejects the whole edit.
+            expect(apiMocks.updateTimeEntry).not.toHaveBeenCalled();
+            expect(apiMocks.createTimeEntry).not.toHaveBeenCalled();
+        });
+    });
+
+    // ── Shrink (unchanged behavior, still correct) ─────────────────
+
+    describe('shrinkFromEnd', () => {
+        it('shortens the latest entry by the requested amount', async () => {
+            const cellEntry = entry('2026-04-10T09:00:00Z', '2026-04-10T12:00:00Z', {
+                id: 'shrink-me',
+            });
+            const { cellMutations } = setup([cellEntry]);
+            const row = buildRow('p-1', [cellEntry]);
+
+            // 3h → 2h: shrink by 1h
+            await cellMutations.handleCellUpdate(row, 0, 2 * HOUR);
+
+            expect(apiMocks.updateTimeEntry).toHaveBeenCalledTimes(1);
+            const updated = firstArg(apiMocks.updateTimeEntry);
+            expect(updated.end).toBe('2026-04-10T11:00:00Z');
+        });
+
+        it('deletes entries that are entirely consumed', async () => {
+            const a = entry('2026-04-10T09:00:00Z', '2026-04-10T10:00:00Z', {
+                id: 'a',
+            });
+            const b = entry('2026-04-10T11:00:00Z', '2026-04-10T12:00:00Z', {
+                id: 'b',
+            });
+            const { cellMutations } = setup([a, b]);
+            const row = buildRow('p-1', [a, b]);
+
+            // Cell = 2h, shrink to 0.5h: must delete b entirely (1h) and
+            // shorten a from 1h to 30min.
+            await cellMutations.handleCellUpdate(row, 0, 1800);
+
+            expect(apiMocks.deleteTimeEntry).toHaveBeenCalledTimes(1);
+            const [, deleteOptions] = apiMocks.deleteTimeEntry.mock.calls[0]!;
+            expect(deleteOptions?.params?.timeEntry).toBe('b');
+
+            expect(apiMocks.updateTimeEntry).toHaveBeenCalledTimes(1);
+            const updated = firstArg(apiMocks.updateTimeEntry);
+            expect(updated.id).toBe('a');
+            expect(updated.end).toBe('2026-04-10T09:30:00Z');
+        });
+    });
+});

resources/js/utils/timesheet/useTimesheetCellMutations.ts

@@ -0,0 +1,320 @@
+import type { Ref } from 'vue';
+import { useQueryClient } from '@tanstack/vue-query';
+import { api, type CreateTimeEntryBody, type TimeEntry } from '@/packages/api/src';
+import { formatHumanReadableDuration, getDayJsInstance } from '@/packages/ui/src/utils/time';
+import { getUserTimezone } from '@/packages/ui/src/utils/settings';
+import { getCurrentMembershipId, getCurrentOrganizationId } from '@/utils/useUser';
+import {
+    makeRowKey,
+    type TimesheetCell,
+    type TimesheetRow,
+    type TimesheetRowKey,
+} from '@/utils/useTimesheetGrid';
+import { useNotificationsStore } from '@/utils/notification';
+import {
+    findFreeWindowOnDay,
+    freeGapSecondsAfter,
+    NoFreeWindowError,
+    workDayStartOn,
+    type FreeWindow,
+} from './cellMath';
+
+/**
+ * Cell-level edit dispatcher. Picks one of four strategies based on
+ * the diff between current and requested totals:
+ *
+ *   - deleteCell    — new total is 0
+ *   - createCell    — empty cell, place in first free window
+ *   - extendCell    — diff > 0, push the latest-ending entry forward,
+ *                     splitting the remainder into a new entry if a
+ *                     collision blocks the path
+ *   - shrinkFromEnd — diff < 0, shorten / delete entries from most-
+ *                     recent backwards
+ *
+ * Running entries (end === null) are treated as immutable. Both create
+ * and extend can throw NoFreeWindowError when the day is too full.
+ *
+ * Calls the API directly (not via useTimeEntriesMutations) so a single
+ * cell edit fanning into multiple mutations produces exactly one toast
+ * and one cache invalidation.
+ */
+export function useTimesheetCellMutations(
+    weekDays: Ref<string[]>,
+    timeEntries: Ref<TimeEntry[]>,
+    rows: Ref<TimesheetRow[]>,
+    removeSlot: (key: TimesheetRowKey) => void
+) {
+    const dayjs = getDayJsInstance();
+    const queryClient = useQueryClient();
+    const notifications = useNotificationsStore();
+
+    async function handleCellUpdate(
+        row: TimesheetRow,
+        dayIndex: number,
+        newTotalSeconds: number
+    ): Promise<void> {
+        const cell = row.cells.get(dayIndex);
+        const existingSeconds = cell?.totalSeconds ?? 0;
+        if (newTotalSeconds === existingSeconds) return;
+
+        // Capture row state before the mutation: a row that was empty
+        // and shares identity with another slot collapses after the
+        // first entry lands, so the entry naturally identity-routes to
+        // the surviving slot.
+        const wasEmpty = row.totalSeconds === 0;
+
+        try {
+            await dispatchCellUpdate(row, dayIndex, newTotalSeconds);
+
+            if (wasEmpty && newTotalSeconds > 0 && hasDuplicateIdentitySlot(row)) {
+                removeSlot(row.key);
+                notifications.addNotification(
+                    'success',
+                    'Merged into matching row',
+                    'Another row with the same project, task, billable status and tags already exists.'
+                );
+            }
+        } catch (err) {
+            if (err instanceof NoFreeWindowError) {
+                const friendlyDuration = formatHumanReadableDuration(
+                    err.requiredSeconds,
+                    'hours-minutes',
+                    'point'
+                );
+                notifications.addNotification(
+                    'error',
+                    "This day can't fit any more work",
+                    `Couldn't fit ${friendlyDuration} on ${err.date} without overlapping existing entries.`
+                );
+                return;
+            }
+            notifications.addNotification(
+                'error',
+                'Failed to update timesheet',
+                'Please try again later.'
+            );
+            throw err;
+        } finally {
+            queryClient.invalidateQueries({ queryKey: ['timeEntries'] });
+        }
+    }
+
+    function hasDuplicateIdentitySlot(row: TimesheetRow): boolean {
+        const target = makeRowKey(row.projectId, row.taskId, row.billable, row.tags);
+        return rows.value.some(
+            (r) =>
+                r.key !== row.key &&
+                makeRowKey(r.projectId, r.taskId, r.billable, r.tags) === target
+        );
+    }
+
+    async function dispatchCellUpdate(
+        row: TimesheetRow,
+        dayIndex: number,
+        newTotalSeconds: number
+    ): Promise<void> {
+        const cell = row.cells.get(dayIndex);
+        const existingSeconds = cell?.totalSeconds ?? 0;
+        const diff = newTotalSeconds - existingSeconds;
+
+        if (newTotalSeconds === 0 && cell) {
+            await deleteCell(cell);
+            return;
+        }
+
+        if (!cell || existingSeconds === 0) {
+            await createCell(row, dayIndex, newTotalSeconds);
+            return;
+        }
+
+        if (diff > 0) {
+            await extendCell(row, dayIndex, cell, diff);
+            return;
+        }
+
+        await shrinkFromEnd(cell, -diff);
+    }
+
+    async function deleteCell(cell: TimesheetCell): Promise<void> {
+        const orgId = requireOrgId();
+        await api.deleteTimeEntries(undefined, {
+            queries: { ids: cell.entries.map((e) => e.id) },
+            params: { organization: orgId },
+        });
+    }
+
+    /**
+     * Place a new entry on the cell's day. Without `afterCursor`, prefers
+     * 09:00 local with a fall-back to start-of-day. With `afterCursor`,
+     * places strictly at-or-after that timestamp (used by extendCell to
+     * skip past a just-written extension that timeEntries.value doesn't
+     * yet reflect). Throws NoFreeWindowError if nothing fits.
+     */
+    async function createCell(
+        row: TimesheetRow,
+        dayIndex: number,
+        totalSeconds: number,
+        afterCursor?: string
+    ): Promise<void> {
+        const date = weekDays.value[dayIndex]!;
+        const tz = getUserTimezone();
+
+        let window: FreeWindow | null;
+        if (afterCursor) {
+            window = findFreeWindowOnDay(timeEntries.value, date, totalSeconds, tz, afterCursor);
+        } else {
+            window =
+                findFreeWindowOnDay(
+                    timeEntries.value,
+                    date,
+                    totalSeconds,
+                    tz,
+                    workDayStartOn(date, tz)
+                ) ?? findFreeWindowOnDay(timeEntries.value, date, totalSeconds, tz);
+        }
+
+        if (!window) throw new NoFreeWindowError(date, totalSeconds);
+
+        const orgId = requireOrgId();
+        const memberId = getCurrentMembershipId();
+        if (!memberId) throw new Error('No member context');
+
+        const body: CreateTimeEntryBody = {
+            member_id: memberId,
+            project_id: row.projectId,
+            task_id: row.taskId,
+            start: window.start,
+            end: window.end,
+            billable: row.billable,
+            description: null,
+            tags: row.tags,
+        };
+        await api.createTimeEntry(body, { params: { organization: orgId } });
+    }
+
+    /**
+     * Push the latest-ending entry's end forward by `addSeconds`, and if
+     * a collision blocks the path before that's exhausted, place the
+     * remainder as a fresh entry in the next free window on the day.
+     */
+    async function extendCell(
+        row: TimesheetRow,
+        dayIndex: number,
+        cell: TimesheetCell,
+        addSeconds: number
+    ): Promise<void> {
+        const date = weekDays.value[dayIndex]!;
+        const tz = getUserTimezone();
+
+        // Latest END (not latest start) — extending a nested inner entry
+        // would leave the outer one as the true tail.
+        const candidate = pickLatestEndedEntry(cell);
+
+        // Running timer (or no ended entry): can't extend, place it all
+        // as a new entry instead.
+        if (!candidate || !candidate.end) {
+            await createCell(row, dayIndex, addSeconds);
+            return;
+        }
+
+        const gap = freeGapSecondsAfter(timeEntries.value, date, tz, candidate.end);
+        const extendBy = Math.min(addSeconds, gap);
+        const remainder = addSeconds - extendBy;
+        const projectedNewEnd = dayjs.utc(candidate.end).add(extendBy, 'second').format();
+
+        // Pre-flight: if there's a remainder, make sure it'll fit in a
+        // window after `projectedNewEnd` BEFORE we issue the extend PATCH.
+        // Otherwise a successful extend followed by a no-fit createCell
+        // would leave the entry persistently lengthened on the server
+        // while the user sees a "can't fit" error.
+        if (remainder > 0) {
+            const fit = findFreeWindowOnDay(
+                timeEntries.value,
+                date,
+                remainder,
+                tz,
+                projectedNewEnd
+            );
+            if (!fit) throw new NoFreeWindowError(date, addSeconds);
+        }
+
+        if (extendBy > 0) {
+            await updateEntry({ ...candidate, end: projectedNewEnd });
+        }
+        if (remainder <= 0) return;
+
+        // timeEntries.value is stale here (still shows candidate's old
+        // end). Force the placement search past projectedNewEnd so it
+        // can't propose a window that overlaps the just-extended candidate.
+        await createCell(row, dayIndex, remainder, projectedNewEnd);
+    }
+
+    async function shrinkFromEnd(cell: TimesheetCell, removeSeconds: number): Promise<void> {
+        let toRemove = removeSeconds;
+
+        // Shrink doesn't introduce overlaps, so latest-START is fine here.
+        const sortedEntries = [...cell.entries].sort((a, b) => b.start.localeCompare(a.start));
+
+        for (const entry of sortedEntries) {
+            if (toRemove <= 0) break;
+            if (!entry.end) continue; // running entries are immutable
+
+            const entryDuration = entry.duration ?? 0;
+
+            if (entryDuration <= toRemove) {
+                await deleteEntry(entry.id);
+                toRemove -= entryDuration;
+            } else {
+                const newEnd = dayjs
+                    .utc(entry.start)
+                    .add(entryDuration - toRemove, 'second')
+                    .format();
+                await updateEntry({ ...entry, end: newEnd });
+                toRemove = 0;
+            }
+        }
+    }
+
+    // ── api helpers ───────────────────────────────────────────────
+
+    function requireOrgId(): string {
+        const id = getCurrentOrganizationId();
+        if (!id) throw new Error('No organization context');
+        return id;
+    }
+
+    async function updateEntry(entry: TimeEntry) {
+        const orgId = requireOrgId();
+        await api.updateTimeEntry(entry, {
+            params: { organization: orgId, timeEntry: entry.id },
+        });
+    }
+
+    async function deleteEntry(id: string) {
+        const orgId = requireOrgId();
+        await api.deleteTimeEntry(undefined, {
+            params: { organization: orgId, timeEntry: id },
+        });
+    }
+
+    function pickLatestEndedEntry(cell: TimesheetCell): TimeEntry | null {
+        let best: TimeEntry | null = null;
+        for (const entry of cell.entries) {
+            if (!best) {
+                best = entry;
+                continue;
+            }
+            // Running entries are treated as "infinite" — they win.
+            if (!entry.end) {
+                best = entry;
+                continue;
+            }
+            if (best.end && entry.end > best.end) {
+                best = entry;
+            }
+        }
+        return best;
+    }
+
+    return { handleCellUpdate };
+}

resources/js/utils/timesheet/useTimesheetRowDeletion.ts

@@ -0,0 +1,70 @@
+import { computed, ref, type Ref } from 'vue';
+import type { Project, TimeEntry } from '@/packages/api/src';
+import type { TimesheetRow, TimesheetRowKey } from '@/utils/useTimesheetGrid';
+import type { useTimeEntriesMutations } from '@/utils/useTimeEntriesMutations';
+
+type Mutations = ReturnType<typeof useTimeEntriesMutations>;
+
+/**
+ * Holds the state and handlers for the "remove row" confirmation flow.
+ *
+ * Empty rows (no entries) are removed immediately without confirmation;
+ * rows with entries open a confirmation dialog, and on confirm we bulk
+ * delete every entry in the row before dropping the row from the grid.
+ */
+export function useTimesheetRowDeletion(
+    projects: Ref<Project[]>,
+    mutations: Pick<Mutations, 'deleteTimeEntries'>,
+    removeSlot: (key: TimesheetRowKey) => void
+) {
+    const showDeleteDialog = ref(false);
+    const rowToDelete = ref<TimesheetRow | null>(null);
+
+    const deleteRowEntryCount = computed(() => {
+        if (!rowToDelete.value) return 0;
+        let count = 0;
+        for (const cell of rowToDelete.value.cells.values()) {
+            count += cell.entries.length;
+        }
+        return count;
+    });
+
+    const deleteRowProjectName = computed(() => {
+        if (!rowToDelete.value?.projectId) return 'No Project';
+        return projects.value.find((p) => p.id === rowToDelete.value?.projectId)?.name ?? 'Unknown';
+    });
+
+    function requestRemoveRow(row: TimesheetRow): void {
+        if (row.totalSeconds === 0) {
+            removeSlot(row.key);
+            return;
+        }
+        rowToDelete.value = row;
+        showDeleteDialog.value = true;
+    }
+
+    async function confirmDeleteRow(): Promise<void> {
+        if (!rowToDelete.value) return;
+
+        const allEntries: TimeEntry[] = [];
+        for (const cell of rowToDelete.value.cells.values()) {
+            allEntries.push(...cell.entries);
+        }
+
+        if (allEntries.length > 0) {
+            await mutations.deleteTimeEntries(allEntries);
+        }
+        removeSlot(rowToDelete.value.key);
+        showDeleteDialog.value = false;
+        rowToDelete.value = null;
+    }
+
+    return {
+        showDeleteDialog,
+        rowToDelete,
+        deleteRowEntryCount,
+        deleteRowProjectName,
+        requestRemoveRow,
+        confirmDeleteRow,
+    };
+}

resources/js/utils/timesheet/useTimesheetRowMutations.test.ts

@@ -0,0 +1,272 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { ref } from 'vue';
+import type { Project, TimeEntry } from '@/packages/api/src';
+import type { TimesheetCell, TimesheetRow } from '@/utils/useTimesheetGrid';
+import { useTimesheetRowMutations } from './useTimesheetRowMutations';
+
+const addNotification = vi.fn();
+
+vi.mock('@/utils/notification', () => ({
+    useNotificationsStore: () => ({
+        addNotification,
+    }),
+}));
+
+function project(id: string, isBillable: boolean): Project {
+    return {
+        id,
+        name: id,
+        is_billable: isBillable,
+    } as unknown as Project;
+}
+
+function entry(id: string): TimeEntry {
+    return {
+        id,
+        start: '2026-04-10T09:00:00Z',
+        end: '2026-04-10T10:00:00Z',
+        duration: 3600,
+        description: '',
+        member_id: 'm-1',
+        project_id: 'p-1',
+        task_id: null,
+        billable: false,
+        tags: [],
+    } as unknown as TimeEntry;
+}
+
+function buildCell(entries: TimeEntry[]): TimesheetCell {
+    return {
+        dayIndex: 0,
+        date: '2026-04-10',
+        entries,
+        totalSeconds: entries.reduce((sum, item) => sum + (item.duration ?? 0), 0),
+    };
+}
+
+function buildRow(key: string, projectId: string | null, entries: TimeEntry[]): TimesheetRow {
+    const cells = entries.length > 0 ? new Map([[0, buildCell(entries)]]) : new Map();
+    const totalSeconds = entries.reduce((sum, item) => sum + (item.duration ?? 0), 0);
+
+    return {
+        key,
+        projectId,
+        taskId: null,
+        billable: false,
+        tags: [],
+        cells,
+        totalSeconds,
+    };
+}
+
+describe('useTimesheetRowMutations', () => {
+    beforeEach(() => {
+        addNotification.mockClear();
+    });
+
+    it('collapses a populated row into an existing matching row after identity change', async () => {
+        const existingRow = buildRow('row-a', 'p-1', [entry('e-a')]);
+        const editedRow = buildRow('row-b', 'p-2', [entry('e-b')]);
+        const rows = ref([existingRow, editedRow]);
+        const updateTimeEntries = vi.fn().mockResolvedValue(undefined);
+        const addSlot = vi.fn();
+        const updateSlot = vi.fn();
+        const removeSlot = vi.fn();
+
+        const { handleRowIdentityChange } = useTimesheetRowMutations(
+            { updateTimeEntries },
+            ref<Project[]>([]),
+            rows,
+            addSlot,
+            updateSlot,
+            removeSlot
+        );
+
+        await handleRowIdentityChange(editedRow, { projectId: 'p-1' });
+
+        expect(updateTimeEntries).toHaveBeenCalledWith({
+            ids: ['e-b'],
+            changes: { project_id: 'p-1' },
+        });
+        expect(removeSlot).toHaveBeenCalledWith('row-b');
+        expect(updateSlot).not.toHaveBeenCalled();
+        expect(addNotification).toHaveBeenCalledWith(
+            'success',
+            'Merged into matching row',
+            'Another row with the same project, task, billable status and tags already exists.'
+        );
+    });
+
+    it('translates identity fields to snake_case API field names', async () => {
+        const row = buildRow('row-a', 'p-1', [entry('e-a')]);
+        const rows = ref([row]);
+        const updateTimeEntries = vi.fn().mockResolvedValue(undefined);
+
+        const { handleRowIdentityChange } = useTimesheetRowMutations(
+            { updateTimeEntries },
+            ref<Project[]>([]),
+            rows,
+            vi.fn(),
+            vi.fn(),
+            vi.fn()
+        );
+
+        await handleRowIdentityChange(row, {
+            projectId: 'p-2',
+            taskId: 't-1',
+            billable: true,
+            tags: ['tag-1'],
+        });
+
+        expect(updateTimeEntries).toHaveBeenCalledWith({
+            ids: ['e-a'],
+            changes: {
+                project_id: 'p-2',
+                task_id: 't-1',
+                billable: true,
+                tags: ['tag-1'],
+            },
+        });
+    });
+
+    it('only includes touched fields in the API changeset', async () => {
+        const row = buildRow('row-a', 'p-1', [entry('e-a')]);
+        const rows = ref([row]);
+        const updateTimeEntries = vi.fn().mockResolvedValue(undefined);
+
+        const { handleRowIdentityChange } = useTimesheetRowMutations(
+            { updateTimeEntries },
+            ref<Project[]>([]),
+            rows,
+            vi.fn(),
+            vi.fn(),
+            vi.fn()
+        );
+
+        await handleRowIdentityChange(row, { tags: ['tag-1'] });
+
+        expect(updateTimeEntries).toHaveBeenCalledWith({
+            ids: ['e-a'],
+            changes: { tags: ['tag-1'] },
+        });
+    });
+
+    it('keeps an empty duplicate row until it receives time', async () => {
+        const existingRow = buildRow('row-a', 'p-1', [entry('e-a')]);
+        const emptyRow = buildRow('row-b', 'p-2', []);
+        const rows = ref([existingRow, emptyRow]);
+        const updateTimeEntries = vi.fn().mockResolvedValue(undefined);
+        const addSlot = vi.fn();
+        const updateSlot = vi.fn();
+        const removeSlot = vi.fn();
+
+        const { handleRowIdentityChange } = useTimesheetRowMutations(
+            { updateTimeEntries },
+            ref<Project[]>([]),
+            rows,
+            addSlot,
+            updateSlot,
+            removeSlot
+        );
+
+        await handleRowIdentityChange(emptyRow, { projectId: 'p-1' });
+
+        expect(updateTimeEntries).not.toHaveBeenCalled();
+        expect(updateSlot).toHaveBeenCalledWith('row-b', {
+            projectId: 'p-1',
+            taskId: null,
+            billable: false,
+            tags: [],
+        });
+        expect(removeSlot).not.toHaveBeenCalled();
+    });
+
+    it('sends null project updates when an existing row changes to no project', async () => {
+        const row = buildRow('row-a', 'p-1', [entry('e-a')]);
+        const rows = ref([row]);
+        const updateTimeEntries = vi.fn().mockResolvedValue(undefined);
+        const updateSlot = vi.fn();
+
+        const { handleRowIdentityChange } = useTimesheetRowMutations(
+            { updateTimeEntries },
+            ref<Project[]>([]),
+            rows,
+            vi.fn(),
+            updateSlot,
+            vi.fn()
+        );
+
+        await handleRowIdentityChange(row, { projectId: null });
+
+        expect(updateTimeEntries).toHaveBeenCalledWith({
+            ids: ['e-a'],
+            changes: { project_id: null },
+        });
+        expect(updateSlot).toHaveBeenCalledWith('row-a', {
+            projectId: null,
+            taskId: null,
+            billable: false,
+            tags: [],
+        });
+    });
+
+    it('defaults billable from the selected project when an empty row picks its first project', async () => {
+        const emptyRow = buildRow('row-a', null, []);
+        const rows = ref([emptyRow]);
+        const updateTimeEntries = vi.fn().mockResolvedValue(undefined);
+        const updateSlot = vi.fn();
+
+        const { handleRowIdentityChange } = useTimesheetRowMutations(
+            { updateTimeEntries },
+            ref([project('p-billable', true)]),
+            rows,
+            vi.fn(),
+            updateSlot,
+            vi.fn()
+        );
+
+        await handleRowIdentityChange(emptyRow, { projectId: 'p-billable' });
+
+        expect(updateTimeEntries).not.toHaveBeenCalled();
+        expect(updateSlot).toHaveBeenCalledWith('row-a', {
+            projectId: 'p-billable',
+            taskId: null,
+            billable: true,
+            tags: [],
+        });
+    });
+
+    it('handleAddRow defaults billable from the selected project metadata', () => {
+        const addSlot = vi.fn();
+
+        const { handleAddRow } = useTimesheetRowMutations(
+            { updateTimeEntries: vi.fn() },
+            ref([project('p-billable', true)]),
+            ref<TimesheetRow[]>([]),
+            addSlot,
+            vi.fn(),
+            vi.fn()
+        );
+
+        handleAddRow('p-billable', 't-1');
+
+        expect(addSlot).toHaveBeenCalledWith('p-billable', 't-1', true, []);
+    });
+
+    it('can add a no-project row', () => {
+        const addSlot = vi.fn();
+
+        const { handleAddRow } = useTimesheetRowMutations(
+            { updateTimeEntries: vi.fn() },
+            ref([project('p-billable', true)]),
+            ref<TimesheetRow[]>([]),
+            addSlot,
+            vi.fn(),
+            vi.fn()
+        );
+
+        handleAddRow(null, null);
+
+        expect(addSlot).toHaveBeenCalledWith(null, null, false, []);
+    });
+});

resources/js/utils/timesheet/useTimesheetRowMutations.ts

@@ -0,0 +1,150 @@
+import type { Ref } from 'vue';
+import type { Project, UpdateMultipleTimeEntriesChangeset } from '@/packages/api/src';
+import {
+    makeRowKey,
+    type TimesheetRow,
+    type TimesheetRowIdentity,
+    type TimesheetRowKey,
+} from '@/utils/useTimesheetGrid';
+import type { useTimeEntriesMutations } from '@/utils/useTimeEntriesMutations';
+import { useNotificationsStore } from '@/utils/notification';
+
+function identityPartialToApiChanges(
+    partial: Partial<TimesheetRowIdentity>
+): UpdateMultipleTimeEntriesChangeset {
+    const changes: UpdateMultipleTimeEntriesChangeset = {};
+    if ('projectId' in partial) changes.project_id = partial.projectId;
+    if ('taskId' in partial) changes.task_id = partial.taskId;
+    if ('billable' in partial) changes.billable = partial.billable;
+    if ('tags' in partial) changes.tags = partial.tags;
+    return changes;
+}
+
+type Mutations = ReturnType<typeof useTimeEntriesMutations>;
+
+/**
+ * Row-level mutations that don't involve confirmation.
+ *
+ * Rows are keyed by slot id (not identity), so any partial change to
+ * a row's identity is handled the same way: push the change to the
+ * server for any entries in the row, then migrate the slot's identity
+ * in place so the row stays at its existing position.
+ */
+export function useTimesheetRowMutations(
+    mutations: Pick<Mutations, 'updateTimeEntries'>,
+    projects: Ref<Project[]>,
+    rows: Ref<TimesheetRow[]>,
+    addSlot: (
+        projectId: string | null,
+        taskId: string | null,
+        billable: boolean,
+        tags: string[]
+    ) => TimesheetRowKey,
+    updateSlot: (key: TimesheetRowKey, identity: TimesheetRowIdentity) => void,
+    removeSlot: (key: TimesheetRowKey) => void
+) {
+    const notifications = useNotificationsStore();
+
+    function collectEntryIds(row: TimesheetRow): string[] {
+        const ids: string[] = [];
+        for (const cell of row.cells.values()) {
+            for (const entry of cell.entries) ids.push(entry.id);
+        }
+        return ids;
+    }
+
+    function hasDuplicateIdentityRow(
+        rowKey: TimesheetRowKey,
+        identity: TimesheetRowIdentity
+    ): boolean {
+        const target = makeRowKey(
+            identity.projectId,
+            identity.taskId,
+            identity.billable,
+            identity.tags
+        );
+
+        return rows.value.some(
+            (candidate) =>
+                candidate.key !== rowKey &&
+                makeRowKey(
+                    candidate.projectId,
+                    candidate.taskId,
+                    candidate.billable,
+                    candidate.tags
+                ) === target
+        );
+    }
+
+    async function handleRowIdentityChange(
+        row: TimesheetRow,
+        partial: Partial<TimesheetRowIdentity>
+    ): Promise<void> {
+        const entryIds = collectEntryIds(row);
+        const currentIdentity = makeRowKey(row.projectId, row.taskId, row.billable, row.tags);
+        let merged: TimesheetRowIdentity = {
+            projectId: row.projectId,
+            taskId: row.taskId,
+            billable: row.billable,
+            tags: row.tags,
+            ...partial,
+        };
+
+        // Auto-default billable on the first project pick for an empty
+        // row (project provides the default; user can override after).
+        if (
+            entryIds.length === 0 &&
+            partial.projectId !== undefined &&
+            partial.projectId !== row.projectId &&
+            partial.projectId &&
+            partial.billable === undefined
+        ) {
+            const projectBillable = projects.value.find(
+                (p) => p.id === partial.projectId
+            )?.is_billable;
+            if (projectBillable !== undefined) {
+                merged = { ...merged, billable: projectBillable };
+            }
+        }
+
+        const mergedIdentity = makeRowKey(
+            merged.projectId,
+            merged.taskId,
+            merged.billable,
+            merged.tags
+        );
+        const shouldMergeIntoExistingRow =
+            entryIds.length > 0 &&
+            currentIdentity !== mergedIdentity &&
+            hasDuplicateIdentityRow(row.key, merged);
+
+        if (entryIds.length > 0) {
+            await mutations.updateTimeEntries({
+                ids: entryIds,
+                changes: identityPartialToApiChanges(partial),
+            });
+        }
+
+        if (shouldMergeIntoExistingRow) {
+            removeSlot(row.key);
+            notifications.addNotification(
+                'success',
+                'Merged into matching row',
+                'Another row with the same project, task, billable status and tags already exists.'
+            );
+            return;
+        }
+
+        updateSlot(row.key, merged);
+    }
+
+    function handleAddRow(projectId: string | null = null, taskId: string | null = null): void {
+        const project = projectId ? projects.value.find((p) => p.id === projectId) : null;
+        addSlot(projectId, taskId, project?.is_billable ?? false, []);
+    }
+
+    return {
+        handleRowIdentityChange,
+        handleAddRow,
+    };
+}