fix: resolve merge conflicts with main branch

Merge origin/main into feature branch, resolving 18 conflicts:
- app/api/__init__.py: add classification_rules_router alongside system_reset_router
- app/config.py: keep system reset settings from main
- app/models.py: keep ClassificationRuleModel alongside main's models
- app/utils/settings_service.py: keep factory reset settings from main
- app/views/__init__.py: keep system_reset_router from main
- tests/conftest.py: add ClassificationRuleModel import
- migrations/env.py: add ClassificationRuleModel import
- .env.demo, docs/*, frontend/*, mobile/*: keep additions from main
- BUILD_DATE, GIT_SHA, RUNTIME_INFO, VERSION, CHANGELOG.md: accept main's version

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

docs/MobileApp.md

@@ -279,7 +279,19 @@ If you wish to use **direct FCM/APNs** without Expo's relay, replace the `send_e
 
 ```
 mobile/
-├── App.tsx                      # Root component
+├── App.tsx                      # Root component (legacy, not used at runtime)
+├── app/                         # Expo Router file-based routes
+│   ├── _layout.tsx              # Root layout (AuthGuard + providers)
+│   ├── index.tsx                # Root redirect → /(auth)/
+│   ├── (auth)/                  # Unauthenticated route group
+│   │   ├── _layout.tsx          # Stack navigator (headerless)
+│   │   ├── index.tsx            # Welcome screen
+│   │   └── login.tsx            # Login screen
+│   └── (tabs)/                  # Authenticated route group
+│       ├── _layout.tsx          # Tab navigator
+│       ├── index.tsx            # Upload screen (default tab)
+│       ├── files.tsx            # Files screen
+│       └── profile.tsx          # Profile screen
 ├── app.json                     # Expo/EAS configuration
 ├── eas.json                     # EAS Build profiles
 ├── package.json
@@ -301,6 +313,26 @@ mobile/
 
 ## Troubleshooting
 
+### App shows "Hello World" / default Expo page after update
+
+If the iOS or Android app shows a generic "Hello World – This is the first page of your app" screen instead of the DocuElevate UI, it means a stale default `index.tsx` file (generated by Expo CLI scaffolding) is being picked up in the `mobile/app/` directory.
+
+**To fix:**
+
+1. Delete any leftover default `mobile/app/index.tsx` that is **not** the repository version (the repo version contains a `<Redirect>` to `/(auth)/`).
+2. Clear the Metro bundler cache and rebuild:
+   ```bash
+   cd mobile
+   npx expo start --clear
+   ```
+3. For production builds, run a clean EAS build:
+   ```bash
+   eas build --platform ios --clear-cache
+   ```
+
+The repository includes a root `app/index.tsx` that immediately redirects to the authentication flow, so this issue should not recur once the correct file is present.
+
+
 ### "Session expired Local session" during iOS build
 
 EAS stores an Apple ID session locally (in `~/.expo/`) to manage code-signing certificates and provisioning profiles.  This session expires after a few weeks.