Implement iOS permissions, navigation improvements, and UI fixes

Add comprehensive iOS permission handling and enhance navigation UX:

iOS Permissions Setup:
- Configure Podfile with permission macros (PERMISSION_LOCATION, PERMISSION_CAMERA, PERMISSION_PHOTOS)
- Add camera and photo library usage descriptions to Info.plist
- Enable location, camera, and photos permissions for permission_handler plugin
- Clean rebuild of iOS dependencies with updated configuration

Navigation Enhancements:
- Implement Google Navigation dark mode with custom map styling
- Add loading overlay during navigation initialization with progress messages
- Fix navigation flow with proper session initialization and error handling
- Enable followMyLocation API for continuous driver location tracking
- Auto-recenter camera on driver location when navigation starts
- Add mounted checks to prevent unmounted widget errors

UI/UX Improvements:
- Fix layout overlapping issues between map, header, and footer
- Add dynamic padding (110px top/bottom) to accommodate navigation UI elements
- Reposition navigation buttons to prevent overlap with turn-by-turn instructions
- Wrap DeliveriesPage body with SafeArea for proper system UI handling
- Add loading states and disabled button behavior during navigation start

Technical Details:
- Enhanced error logging with debug messages for troubleshooting
- Implement retry logic for navigation session initialization (30 retries @ 100ms)
- Apply dark mode style with 500ms delay for proper map rendering
- Use CameraPerspective.tilted for optimal driving view
- Remove manual camera positioning in favor of native follow mode

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

ios/Podfile

@@ -39,5 +39,21 @@ end
 post_install do |installer|
   installer.pods_project.targets.each do |target|
     flutter_additional_ios_build_settings(target)
+
+    # CRITICAL: Enable permissions for permission_handler plugin
+    target.build_configurations.each do |config|
+      config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= [
+        '$(inherited)',
+
+        ## dart: [PermissionGroup.location, PermissionGroup.locationAlways, PermissionGroup.locationWhenInUse]
+        'PERMISSION_LOCATION=1',
+
+        ## dart: PermissionGroup.camera (for image_picker)
+        'PERMISSION_CAMERA=1',
+
+        ## dart: PermissionGroup.photos (for image_picker)
+        'PERMISSION_PHOTOS=1',
+      ]
+    end
   end
 end