feat: remote browser login persistence + balance display + UI consistency

- Retain login state in remote browser profiles (don't delete on disconnect)
- Add GET /api/browser-sessions/{id}/clipboard for clipboard sync
- Add POST /api/browser-sessions/{id}/autofill-login for manual credential fill
- Add DELETE /api/browser-sessions/profiles/{custom_page_id} for login clear
- Add balance tracking with configurable divisor (balance_divisor)
- Health check on session reuse, idle TTL eviction, background cleanup
- Add first-frame watchdog (10s timeout) to prevent infinite loading
- Reconnect browser on active=true when session was closed
- UI: uniform text-only inline buttons (websites + upstreams pages)
- Fix page switch race with closingRemoteSessionPromise

frontend/src/router/index.ts

@@ -13,7 +13,7 @@ const router = createRouter({
       path: '/',
       component: () => import('@/components/AppLayout.vue'),
       meta: { requiresAuth: true },
-      redirect: '/upstreams',
+      redirect: '/websites',
       children: [
         { path: 'upstreams', component: () => import('@/views/Upstreams.vue') },
         { path: 'websites', component: () => import('@/views/Websites.vue') },
@@ -32,7 +32,7 @@ router.beforeEach((to, _from, next) => {
   if (to.meta.requiresAuth && !auth.token) {
     next('/login')
   } else if (to.path === '/login' && auth.token) {
-    next('/upstreams')
+    next('/websites')
   } else {
     next()
   }