feat(staff): Restrict staff permissions and add schedule view

- Backend: Restrict staff from accessing resources, customers, services, and tasks APIs
- Frontend: Hide management sidebar links from staff members
- Add StaffSchedule page with vertical timeline view of appointments
- Add StaffHelp page with staff-specific documentation
- Return linked_resource_id and can_edit_schedule in user profile for staff

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

mobile/field-app/package.json

@@ -28,7 +28,9 @@
     "expo-task-manager": "~14.0.9",
     "react": "^19.1.0",
     "react-native": "0.81.5",
+    "react-native-gesture-handler": "~2.28.0",
     "react-native-maps": "1.20.1",
+    "react-native-reanimated": "~4.1.1",
     "react-native-safe-area-context": "~5.6.0",
     "react-native-screens": "~4.16.0"
   },