feat: add Nav Panel with URL-routed section navigation

- Add NavPanel widget for room-level section navigation
- Add Control Room feature router with URL routes:
  - /control-room/containers
  - /control-room/networks
  - /control-room/volumes
  - /control-room/images
- Sections: Containers, Networks, Volumes, Images
- Navigation updates URL and vice versa (deep-linkable)
- Remove redundant Stacks section (handled by filter panel)

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

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

lib/routing/app_router.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
 import 'package:riverpod_annotation/riverpod_annotation.dart';
-import 'package:tatlock_ui/features/control_room/presentation/pages/control_room_page.dart';
+import 'package:tatlock_ui/features/control_room/router.dart';
 import 'package:tatlock_ui/features/front_hall/presentation/pages/front_hall_page.dart';
 import 'package:tatlock_ui/shared/layouts/app_scaffold.dart';
 
@@ -10,9 +10,6 @@ part 'app_router.g.dart';
 /// Route paths as constants.
 abstract class AppRoutes {
   static const frontHall = '/';
-  static const controlRoom = '/control-room';
-  static const containers = '/control-room/containers';
-  static const containerDetail = '/control-room/containers/:id';
   static const parlor = '/parlor';
   static const settings = '/settings';
 }
@@ -32,11 +29,7 @@ GoRouter appRouter(AppRouterRef ref) {
             name: 'frontHall',
             builder: (context, state) => const FrontHallPage(),
           ),
-          GoRoute(
-            path: AppRoutes.controlRoom,
-            name: 'controlRoom',
-            builder: (context, state) => const ControlRoomPage(),
-          ),
+          ...controlRoomRoutes(),
           GoRoute(
             path: AppRoutes.parlor,
             name: 'parlor',