1. Add 登陆功能

2. 调整字体大小
3. 新增部分功能

backend/app/shared/bootstrap.py

@@ -252,7 +252,31 @@ def get_document_query_service() -> DocumentQueryService:
 
 @lru_cache
 def get_conversation_store() -> InMemoryConversationStore:
-    """Return conversation store."""
+    """Return the active conversation store based on settings.
+
+    When session_backend='redis', sessions survive backend restarts and scale
+    across multiple API worker processes. When session_backend='memory' (default),
+    sessions are process-local and lost on restart.
+    """
+    if settings.session_backend == "redis":
+        import redis as redis_lib
+        from app.infrastructure.session.redis_conversation_store import RedisConversationStore
+
+        # Build the Redis client from the same connection settings used by Celery.
+        kwargs: dict = {
+            "host": settings.redis_host,
+            "port": settings.redis_port,
+            "db": settings.redis_db,
+            "decode_responses": False,
+        }
+        if settings.redis_password:
+            kwargs["password"] = settings.redis_password
+
+        redis_client = redis_lib.Redis(**kwargs)
+        return RedisConversationStore(  # type: ignore[return-value]
+            redis_client=redis_client,
+            timeout_seconds=settings.session_timeout_minutes * 60,
+        )
     return InMemoryConversationStore(
         max_sessions=settings.session_max_sessions,
         timeout_minutes=settings.session_timeout_minutes,
@@ -284,6 +308,35 @@ def get_agent_session_service() -> AgentSessionService:
     return AgentSessionService(conversation_store=get_conversation_store())
 
 
+@lru_cache
+def get_celery_app():
+    """Return the shared Celery application instance.
+
+    Imported lazily so Celery is not required when running without workers
+    (e.g., tests that mock bootstrap or dev without Redis).
+    """
+    from app.infrastructure.tasks.celery_app import celery_app
+    return celery_app
+
+
+@lru_cache
+def get_jwt_handler():
+    """Return the shared JWTHandler instance for token creation and validation."""
+    from app.infrastructure.auth.jwt_handler import JWTHandler
+    return JWTHandler(
+        secret_key=settings.auth_secret_key,
+        algorithm=settings.auth_algorithm,
+        expire_minutes=settings.auth_token_expire_minutes,
+    )
+
+
+@lru_cache
+def get_user_store():
+    """Return the PostgreSQL user store (lazy-connects on first call)."""
+    from app.infrastructure.auth.user_store import PostgresUserStore
+    return PostgresUserStore()
+
+
 def preload_runtime_dependencies() -> None:
     """Warm dependencies that are safe and useful to preload during startup."""
     LLMFactory.preload_clients(["qwen", "deepseek"])