feat: add empty state for connection page when no apps configured

Show different messages depending on user role:
- Regular users see a friendly "check back later" message
- Admins see a prompt with a link to /admin/apps settings

src/locales/en.json

@@ -355,7 +355,11 @@
       "selectPlatform": "Select platform",
       "app": "app",
       "apps": "apps",
-      "tutorial": "Tutorial"
+      "tutorial": "Tutorial",
+      "notConfigured": "Connection methods are not configured yet",
+      "notConfiguredUser": "Connection setup is in progress. Please check back later.",
+      "notConfiguredAdmin": "No connection apps have been configured. Set them up in the Apps settings.",
+      "goToApps": "Go to Apps settings"
     },
     "myDevices": "My Devices",
     "noDevices": "No connected devices",

src/locales/fa.json

@@ -307,7 +307,11 @@
       "selectPlatform": "انتخاب پلتفرم",
       "app": "برنامه",
       "apps": "برنامه",
-      "tutorial": "آموزش"
+      "tutorial": "آموزش",
+      "notConfigured": "روش‌های اتصال هنوز پیکربندی نشده‌اند",
+      "notConfiguredUser": "تنظیمات اتصال در حال انجام است. لطفاً بعداً مراجعه کنید.",
+      "notConfiguredAdmin": "هیچ برنامه اتصالی پیکربندی نشده است. آن‌ها را در تنظیمات برنامه‌ها تنظیم کنید.",
+      "goToApps": "رفتن به تنظیمات برنامه‌ها"
     },
     "additionalOptions": {
       "title": "گزینه‌های اضافی",

src/locales/ru.json

@@ -377,7 +377,11 @@
       "selectPlatform": "Выберите платформу",
       "app": "приложение",
       "apps": "приложений",
-      "tutorial": "Инструкция"
+      "tutorial": "Инструкция",
+      "notConfigured": "Способы подключения ещё не настроены",
+      "notConfiguredUser": "Настройка подключения в процессе. Пожалуйста, загляните позже.",
+      "notConfiguredAdmin": "Приложения для подключения не настроены. Настройте их в разделе Приложения.",
+      "goToApps": "Перейти к настройке приложений"
     },
     "myDevices": "Мои устройства",
     "noDevices": "Нет подключенных устройств",

src/locales/zh.json

@@ -307,7 +307,11 @@
       "selectPlatform": "选择平台",
       "app": "个应用",
       "apps": "个应用",
-      "tutorial": "教程"
+      "tutorial": "教程",
+      "notConfigured": "连接方式尚未配置",
+      "notConfiguredUser": "连接设置正在进行中，请稍后再来查看。",
+      "notConfiguredAdmin": "尚未配置连接应用。请在应用设置中进行配置。",
+      "goToApps": "前往应用设置"
     },
     "additionalOptions": {
       "title": "附加选项",