Add core support for extendable authentication

add support for passwordless user creation; add filament loading support
for new laravel modules namespacing;
add support for pluggable password reset and login rules

resources/js/Pages/Auth/Login.vue

@@ -7,10 +7,16 @@ import { Field, FieldLabel, FieldError } from '@/packages/ui/src/field';
 import PrimaryButton from '@/packages/ui/src/Buttons/PrimaryButton.vue';
 import TextInput from '@/packages/ui/src/Input/TextInput.vue';
 
-defineProps({
-    canResetPassword: Boolean,
-    status: String,
-});
+withDefaults(
+    defineProps<{
+        canResetPassword?: boolean;
+        status?: string;
+    }>(),
+    {
+        canResetPassword: false,
+        status: '',
+    }
+);
 
 const form = useForm({
     email: '',
@@ -28,8 +34,8 @@ const submit = () => {
 };
 
 const page = usePage<{
-    flash: {
-        message: string;
+    flash?: {
+        message?: string;
     };
 }>();
 </script>
@@ -61,6 +67,9 @@ const page = usePage<{
             {{ page.props.flash?.message }}
         </div>
 
+        <!-- Extension seam: alternative-auth errors (e.g. SSO callback failures) -->
+        <slot name="error" />
+
         <form @submit.prevent="submit">
             <Field>
                 <FieldLabel for="email">Email</FieldLabel>
@@ -103,5 +112,8 @@ const page = usePage<{
                 </PrimaryButton>
             </div>
         </form>
+
+        <!-- Extension seam: alternative auth methods (e.g. SSO providers) -->
+        <slot name="alternatives" />
     </AuthenticationCard>
 </template>