feat: localization, file restriction banners, test credentials, edit icon fix

- #553: Audit and verify localizations (en/es), replace hardcoded strings
- #549: Incomplete profile banner in Find Shifts (staff app)
- #550: File restriction banner on document upload page
- #551: File restriction banner on certificate upload page
- #552: File restriction banner on attire upload page
- #492: Hide edit icon for past/completed orders (client app)
- #524: Display worker benefits in staff app
- Add test credentials to seed: testclient@gmail.com, staff +1-555-555-1234
- Fix document upload validation (context arg in _validatePdfFile on submit)
- Add PR_LOCALIZATION.md

Made-with: Cursor

apps/mobile/packages/features/staff/clock_in/lib/src/presentation/widgets/location_map_placeholder.dart

@@ -1,3 +1,4 @@
+import 'package:core_localization/core_localization.dart';
 import 'package:design_system/design_system.dart';
 import 'package:flutter/material.dart';
 
@@ -42,7 +43,7 @@ class LocationMapPlaceholder extends StatelessWidget {
                   color: UiColors.iconSecondary,
                 ),
                 const SizedBox(height: UiConstants.space2),
-                Text('Map View (GPS)', style: UiTypography.body2r.textSecondary),
+                Text(context.t.staff.clock_in.map_view_gps, style: UiTypography.body2r.textSecondary),
               ],
             ),
           ),