auto-claude: subtask-6-1 - Run flutter analyze to ensure no errors or warnings

Fixed all 39 analyzer issues:
- Removed unused import (animation_system.dart in collapsible_routes_sidebar.dart)
- Removed unused element (_buildActionButton in dark_mode_map.dart)
- Fixed unnecessary non-null assertions on AppLocalizations.of(context)
- Removed unnecessary type checks in providers.dart
- Used super parameters for key in navigation_tc_dialog.dart and status_colors.dart
- Replaced print statements with debugPrint in providers.dart and logging_interceptor.dart

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

lib/pages/deliveries_page.dart

@@ -88,7 +88,7 @@ class _DeliveriesPageState extends ConsumerState<DeliveriesPage> {
     final deliveriesData = ref.watch(deliveriesProvider(widget.routeFragmentId));
     final tokenAsync = ref.watch(authTokenProvider);
     final token = tokenAsync.hasValue ? tokenAsync.value : null;
-    final l10n = AppLocalizations.of(context)!;
+    final l10n = AppLocalizations.of(context);
 
     // When embedded in sidebar, show only the delivery list with back button
     // This is a responsive sidebar that collapses like routes
@@ -300,7 +300,7 @@ class _DeliveriesPageState extends ConsumerState<DeliveriesPage> {
     }
 
     if (token == null) {
-      final l10n = AppLocalizations.of(context)!;
+      final l10n = AppLocalizations.of(context);
       ToastHelper.showError(context, l10n.authenticationRequired);
       return;
     }
@@ -322,7 +322,7 @@ class _DeliveriesPageState extends ConsumerState<DeliveriesPage> {
         );
         result.when(
           success: (_) {
-            final l10n = AppLocalizations.of(context)!;
+            final l10n = AppLocalizations.of(context);
             // ignore: unused_result
             ref.refresh(deliveriesProvider(widget.routeFragmentId));
             // ignore: unused_result
@@ -330,7 +330,7 @@ class _DeliveriesPageState extends ConsumerState<DeliveriesPage> {
             ToastHelper.showSuccess(context, l10n.deliverySuccessful);
           },
           onError: (error) {
-            final l10n = AppLocalizations.of(context)!;
+            final l10n = AppLocalizations.of(context);
             ToastHelper.showError(context, l10n.error(error.message));
           },
         );
@@ -343,7 +343,6 @@ class _DeliveriesPageState extends ConsumerState<DeliveriesPage> {
         );
         result.when(
           success: (_) {
-            final l10n = AppLocalizations.of(context)!;
             // ignore: unused_result
             ref.refresh(deliveriesProvider(widget.routeFragmentId));
             // ignore: unused_result
@@ -351,7 +350,7 @@ class _DeliveriesPageState extends ConsumerState<DeliveriesPage> {
             ToastHelper.showSuccess(context, 'Delivery marked as uncompleted');
           },
           onError: (error) {
-            final l10n = AppLocalizations.of(context)!;
+            final l10n = AppLocalizations.of(context);
             ToastHelper.showError(context, l10n.error(error.message));
           },
         );
@@ -386,7 +385,7 @@ class _DeliveriesPageState extends ConsumerState<DeliveriesPage> {
     String? token,
   ) async {
     if (token == null) {
-      final l10n = AppLocalizations.of(context)!;
+      final l10n = AppLocalizations.of(context);
       ToastHelper.showError(context, l10n.authenticationRequired);
       return;
     }

lib/pages/login_page.dart

@@ -79,7 +79,7 @@ class _LoginPageState extends ConsumerState<LoginPage> {
                   ),
                   const SizedBox(height: 24),
                   Text(
-                    AppLocalizations.of(context)!.appTitle,
+                    AppLocalizations.of(context).appTitle,
                     textAlign: TextAlign.center,
                     style: Theme.of(context).textTheme.displayMedium?.copyWith(
                           color: Theme.of(context).colorScheme.primary,
@@ -88,7 +88,7 @@ class _LoginPageState extends ConsumerState<LoginPage> {
                   ),
                   const SizedBox(height: 8),
                   Text(
-                    AppLocalizations.of(context)!.appDescription,
+                    AppLocalizations.of(context).appDescription,
                     textAlign: TextAlign.center,
                     style: Theme.of(context).textTheme.bodyLarge?.copyWith(
                           color: Theme.of(context).colorScheme.onSurfaceVariant,
@@ -98,8 +98,8 @@ class _LoginPageState extends ConsumerState<LoginPage> {
                   TextFormField(
                     controller: _usernameController,
                     decoration: InputDecoration(
-                      labelText: AppLocalizations.of(context)!.username,
-                      hintText: AppLocalizations.of(context)!.usernameHint,
+                      labelText: AppLocalizations.of(context).username,
+                      hintText: AppLocalizations.of(context).usernameHint,
                       prefixIcon: const Icon(Icons.person),
                       border: const OutlineInputBorder(),
                     ),
@@ -107,7 +107,7 @@ class _LoginPageState extends ConsumerState<LoginPage> {
                     enabled: !_isLoading,
                     validator: (value) {
                       if (value == null || value.trim().isEmpty) {
-                        return AppLocalizations.of(context)!.usernameRequired;
+                        return AppLocalizations.of(context).usernameRequired;
                       }
                       return null;
                     },
@@ -116,8 +116,8 @@ class _LoginPageState extends ConsumerState<LoginPage> {
                   TextFormField(
                     controller: _passwordController,
                     decoration: InputDecoration(
-                      labelText: AppLocalizations.of(context)!.password,
-                      hintText: AppLocalizations.of(context)!.passwordHint,
+                      labelText: AppLocalizations.of(context).password,
+                      hintText: AppLocalizations.of(context).passwordHint,
                       prefixIcon: const Icon(Icons.lock),
                       border: const OutlineInputBorder(),
                       suffixIcon: IconButton(
@@ -137,7 +137,7 @@ class _LoginPageState extends ConsumerState<LoginPage> {
                     onFieldSubmitted: (_) => _handleLogin(),
                     validator: (value) {
                       if (value == null || value.isEmpty) {
-                        return AppLocalizations.of(context)!.passwordRequired;
+                        return AppLocalizations.of(context).passwordRequired;
                       }
                       return null;
                     },
@@ -159,7 +159,7 @@ class _LoginPageState extends ConsumerState<LoginPage> {
                               ),
                             ),
                           )
-                        : Text(AppLocalizations.of(context)!.loginButton),
+                        : Text(AppLocalizations.of(context).loginButton),
                   ),
                 ],
               ),

lib/pages/settings_page.dart

@@ -11,7 +11,7 @@ class SettingsPage extends ConsumerWidget {
     final userProfile = ref.watch(userProfileProvider);
     final languageAsync = ref.watch(languageProvider);
     final themeMode = ref.watch(themeModeProvider);
-    final l10n = AppLocalizations.of(context)!;
+    final l10n = AppLocalizations.of(context);
 
     final language = languageAsync.maybeWhen(
       data: (value) => value,