feat: add NPM and Authentik sections to Control Room navigation

- Add ControlRoomNav enum with section grouping (Portainer, NPM, Authentik)
- Update NavPanel to support conditional section headers
- Rename NavSection to NavItem with optional section field
- Add routes for NPM: Proxy Hosts, Redirections, Streams, SSL Certificates
- Add routes for Authentik: Users, Groups, Applications
- Section headers auto-show when multiple sections exist

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

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

lib/features/control_room/presentation/pages/control_room_page.dart

@@ -11,35 +11,15 @@ import 'package:tatlock_ui/features/control_room/stacks/presentation/widgets/sta
 import 'package:tatlock_ui/shared/layouts/widgets/filter_panel.dart';
 import 'package:tatlock_ui/shared/layouts/widgets/nav_panel.dart';
 
-/// Control Room navigation sections.
-enum ControlRoomSection {
-  containers('containers', 'Containers', Icons.dns),
-  networks('networks', 'Networks', Icons.hub),
-  volumes('volumes', 'Volumes', Icons.storage),
-  images('images', 'Images', Icons.photo_library);
-
-  const ControlRoomSection(this.id, this.label, this.icon);
-
-  final String id;
-  final String label;
-  final IconData icon;
-
-  NavSection toNavSection() => NavSection(
-        id: id,
-        label: label,
-        icon: icon,
-      );
-}
-
 /// Main Control Room page with nav panel and section content.
 class ControlRoomPage extends ConsumerWidget {
   const ControlRoomPage({
     super.key,
-    this.section = ControlRoomSection.containers,
+    this.nav = ControlRoomNav.containers,
   });
 
-  /// The current section to display.
-  final ControlRoomSection section;
+  /// The current nav item to display.
+  final ControlRoomNav nav;
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {
@@ -48,20 +28,18 @@ class ControlRoomPage extends ConsumerWidget {
     return Scaffold(
       body: Row(
         children: [
-          // Nav Panel - section navigation
+          // Nav Panel - section navigation with grouping
           NavPanel(
             title: 'Sections',
             icon: Icons.dns_outlined,
-            sections: ControlRoomSection.values
-                .map((s) => s.toNavSection())
-                .toList(),
-            selectedId: section.id,
-            onSectionSelected: (id) {
-              final newSection = ControlRoomSection.values.firstWhere(
-                (s) => s.id == id,
+            items: ControlRoomNav.values.map((n) => n.toNavItem()).toList(),
+            selectedId: nav.id,
+            onItemSelected: (id) {
+              final newNav = ControlRoomNav.values.firstWhere(
+                (n) => n.id == id,
               );
               // Navigate to section URL
-              context.go(pathForSection(newSection));
+              context.go(pathForNav(newNav));
               // Clear stack selection when changing sections
               ref.read(selectedStackProvider.notifier).clear();
             },
@@ -74,7 +52,7 @@ class ControlRoomPage extends ConsumerWidget {
           ),
           // Section content
           Expanded(
-            child: _SectionContent(section: section),
+            child: _SectionContent(nav: nav),
           ),
         ],
       ),
@@ -82,21 +60,19 @@ class ControlRoomPage extends ConsumerWidget {
   }
 }
 
-/// Renders content for the selected section.
+/// Renders content for the selected nav item.
 class _SectionContent extends ConsumerWidget {
-  const _SectionContent({required this.section});
+  const _SectionContent({required this.nav});
 
-  final ControlRoomSection section;
+  final ControlRoomNav nav;
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {
-    switch (section) {
-      case ControlRoomSection.containers:
+    switch (nav) {
+      case ControlRoomNav.containers:
         return const _ContainersSection();
-      case ControlRoomSection.networks:
-      case ControlRoomSection.volumes:
-      case ControlRoomSection.images:
-        return _PlaceholderSection(section: section);
+      default:
+        return _PlaceholderSection(nav: nav);
     }
   }
 }
@@ -131,11 +107,11 @@ class _ContainersSection extends ConsumerWidget {
   }
 }
 
-/// Placeholder for sections not yet implemented.
+/// Placeholder for nav items not yet implemented.
 class _PlaceholderSection extends StatelessWidget {
-  const _PlaceholderSection({required this.section});
+  const _PlaceholderSection({required this.nav});
 
-  final ControlRoomSection section;
+  final ControlRoomNav nav;
 
   @override
   Widget build(BuildContext context) {
@@ -147,20 +123,20 @@ class _PlaceholderSection extends StatelessWidget {
         mainAxisSize: MainAxisSize.min,
         children: [
           Icon(
-            section.icon,
+            nav.icon,
             size: 64,
             color: colorScheme.outline,
           ),
           const SizedBox(height: 16),
           Text(
-            section.label,
+            nav.label,
             style: textTheme.headlineSmall?.copyWith(
               color: colorScheme.onSurfaceVariant,
             ),
           ),
           const SizedBox(height: 8),
           Text(
-            'Coming soon',
+            '${nav.section} • Coming soon',
             style: textTheme.bodyMedium?.copyWith(
               color: colorScheme.outline,
             ),