feat(portal): auth persistence, shift visibility, profile page, and UI polish

- Fix session persistence: add loading state to App.vue, hydrate portal store
  in router guards so page refresh preserves auth + event context
- Fix shift visibility for festivals: query child event time slots so shifts
  on sub-events appear in the portal
- Add profile page with editable personal info and password change
- Add backend endpoints: PUT /portal/profile and PUT /portal/password
- Fix registration form: make first_name/last_name editable for logged-in users
- Restyle login page: remove Vuexy illustration, center form with Crewli branding
- Improve dashboard StatusCard with action cards, icons, and upcoming shift count
- Enhance shift cards with status border colors and availability progress bars

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

api/routes/api.php

@@ -80,6 +80,8 @@ Route::middleware('auth:sanctum')->group(function () {
 
     // Portal (authenticated)
     Route::get('portal/me', [PortalMeController::class, 'index']);
+    Route::put('portal/profile', [PortalMeController::class, 'updateProfile']);
+    Route::put('portal/password', [PortalMeController::class, 'updatePassword']);
     Route::get('portal/events/{event}/available-shifts', [PortalShiftController::class, 'availableShifts']);
     Route::get('portal/events/{event}/my-shifts', [PortalShiftController::class, 'myShifts']);
     Route::post('portal/events/{event}/shifts/{shift}/claim', [PortalShiftController::class, 'claim']);