Fix blank page issue on module route refresh

- Pre-register all module routes automatically from module definitions in router configuration
- Add useModuleReady composable for clean reactive loading states during module initialization
- Update ChatPage and EventsPage with proper loading/error states and computed service access
- Remove duplicate route registration from plugin manager install phase
- Maintain modular architecture while ensuring routes are available immediately on app startup

Resolves blank pages and Vue Router warnings when refreshing on /chat, /events, /my-tickets routes.
Users now see proper loading indicators instead of blank screens during module initialization.

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

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

src/app.ts

@@ -34,11 +34,21 @@ export async function createAppInstance() {
   // Create Vue app
   const app = createApp(App)
 
-  // Create router
+  // Collect all module routes automatically to avoid duplication
+  const moduleRoutes = [
+    // Extract routes from modules directly
+    ...baseModule.routes || [],
+    ...nostrFeedModule.routes || [],
+    ...chatModule.routes || [],
+    ...eventsModule.routes || [],
+    ...marketModule.routes || []
+  ].filter(Boolean)
+
+  // Create router with all routes available immediately
   const router = createRouter({
     history: createWebHistory(),
     routes: [
-      // Default route - will be populated by modules
+      // Default routes
       {
         path: '/',
         name: 'home',
@@ -50,7 +60,9 @@ export async function createAppInstance() {
         name: 'login',
         component: () => import('./pages/LoginDemo.vue'),
         meta: { requiresAuth: false }
-      }
+      },
+      // Pre-register module routes
+      ...moduleRoutes
     ]
   })