add timesheet unit and e2e tests; add unit test CI setup

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);
+    });
+});