feat(assistant): implement spec 021 chat assistant flow with semantic contracts

frontend/src/lib/i18n/locales/en.json

@@ -221,6 +221,24 @@
     "cron_hint": "e.g., 0 0 * * * for daily at midnight",
     "footer_text": "Task continues running in background"
   },
+  "assistant": {
+    "title": "AI Assistant",
+    "open": "Open assistant",
+    "close": "Close assistant",
+    "send": "Send",
+    "input_placeholder": "Type a command...",
+    "loading_history": "Loading history...",
+    "try_commands": "Try commands:",
+    "open_task_drawer": "Open Task Drawer",
+    "states": {
+      "started": "Started",
+      "success": "Success",
+      "failed": "Failed",
+      "needs_confirmation": "Needs confirmation",
+      "needs_clarification": "Needs clarification",
+      "denied": "Denied"
+    }
+  },
   "connections": {
     "management": "Connection Management",
     "add_new": "Add New Connection",
@@ -339,4 +357,4 @@
       "select_role": "Select a role"
     }
   }
-}
+}

frontend/src/lib/i18n/locales/ru.json

@@ -220,6 +220,24 @@
     "cron_hint": "например, 0 0 * * * для ежедневного запуска в полночь",
     "footer_text": "Задача продолжает работать в фоновом режиме"
   },
+  "assistant": {
+    "title": "AI Ассистент",
+    "open": "Открыть ассистента",
+    "close": "Закрыть ассистента",
+    "send": "Отправить",
+    "input_placeholder": "Введите команду...",
+    "loading_history": "Загрузка истории...",
+    "try_commands": "Попробуйте команды:",
+    "open_task_drawer": "Открыть Task Drawer",
+    "states": {
+      "started": "Запущено",
+      "success": "Успешно",
+      "failed": "Ошибка",
+      "needs_confirmation": "Требует подтверждения",
+      "needs_clarification": "Нужно уточнение",
+      "denied": "Доступ запрещен"
+    }
+  },
   "connections": {
     "management": "Управление подключениями",
     "add_new": "Добавить новое подключение",
@@ -338,4 +356,4 @@
       "select_role": "Выберите роль"
     }
   }
-}
+}