fix(conversation): 离屏不丢回复、列表预热 WS 与非阻塞进入聊天

- 后端：文本/转写后 AI 生成改为独立任务，避免断连取消整轮；按需 TTS 等与 WS 改动
- 前端：RealtimeSession 重绑 UI 时恢复流式 buffer；列表 onPressIn/挂载预热、已有会话立即 push
- 同步会话相关类型、i18n、测试与 env/资源等累计改动

Co-authored-by: Cursor <cursoragent@cursor.com>

api/app/features/user/service.py

@@ -46,14 +46,9 @@ class UserService:
         user = await repo.get_user_by_id(user_id, self._db)
         if not user:
             raise ValueError("用户不存在")
-        if body.birth_year is not None:
-            user.birth_year = body.birth_year
-        if body.birth_place is not None:
-            user.birth_place = body.birth_place
-        if body.grew_up_place is not None:
-            user.grew_up_place = body.grew_up_place
-        if body.occupation is not None:
-            user.occupation = body.occupation
+        for field in ("birth_year", "birth_place", "grew_up_place", "occupation"):
+            if field in body.model_fields_set:
+                setattr(user, field, getattr(body, field))
         await self._db.commit()
         await self._db.refresh(user)
         return _user_to_profile(user)