fix：修复提示词工坊公开接口验证逻辑 4

backend/app/api/prompt_workshop.py

@@ -258,8 +258,10 @@ async def _get_items_local(
 
 
 @router.get("/items/{item_id}")
-async def get_item(item_id: str, db: AsyncSession = Depends(get_db)):
+async def get_item(item_id: str, request: Request, db: AsyncSession = Depends(get_db)):
     """获取单个提示词详情"""
+    user_identifier = get_optional_user_identifier(request)
+    
     if is_workshop_server():
         result = await db.execute(
             select(PromptWorkshopItem).where(
@@ -273,7 +275,7 @@ async def get_item(item_id: str, db: AsyncSession = Depends(get_db)):
         return {"success": True, "data": _item_to_dict(item)}
     else:
         try:
-            return await workshop_client.get_item(item_id)
+            return await workshop_client.get_item(item_id, user_identifier=user_identifier)
         except WorkshopClientError as e:
             raise HTTPException(status_code=503, detail=str(e))
 
@@ -305,7 +307,7 @@ async def import_item(
     else:
         # 从云端获取
         try:
-            result = await workshop_client.get_item(item_id)
+            result = await workshop_client.get_item(item_id, user_identifier=user_identifier)
             item_data = result.get("data", result)
             
             # 通知云端增加下载计数

backend/app/config.py

@@ -128,17 +128,34 @@ config_logger.debug(f"AI提供商: {settings.default_ai_provider}")
 # ==================== 提示词工坊实例标识 ====================
 
 def get_or_create_instance_id() -> str:
-    """获取或创建实例唯一标识"""
+    """获取或创建实例唯一标识
+    
+    - Server 模式：固定使用 "server" 作为标识，确保与所有 Client 实例区分
+    - Client 模式：从 .instance_id 文件读取或自动生成唯一标识
+    """
+    # Server 模式使用固定标识
+    if settings.WORKSHOP_MODE.lower() == "server":
+        config_logger.info("Server 模式：使用固定实例标识 'server'")
+        return "server"
+    
+    # Client 模式：从文件读取或生成
     instance_file = PROJECT_ROOT / ".instance_id"
     if instance_file.exists():
         with open(instance_file, 'r') as f:
-            return f.read().strip()
-    else:
-        instance_id = str(uuid.uuid4())[:12]
+            instance_id = f.read().strip()
+            if instance_id and instance_id != "server":  # 确保不与 server 冲突
+                return instance_id
+    
+    # 生成新的实例ID
+    instance_id = str(uuid.uuid4())[:12]
+    try:
         with open(instance_file, 'w') as f:
             f.write(instance_id)
         config_logger.info(f"生成新的实例标识: {instance_id}")
-        return instance_id
+    except Exception as e:
+        config_logger.warning(f"无法保存实例标识到文件: {e}")
+    
+    return instance_id
 
 INSTANCE_ID = get_or_create_instance_id()
 

backend/app/services/workshop_client.py

@@ -99,9 +99,9 @@ class WorkshopClient:
             user_identifier=user_identifier
         )
     
-    async def get_item(self, item_id: str) -> Dict:
+    async def get_item(self, item_id: str, user_identifier: Optional[str] = None) -> Dict:
         """获取单个提示词详情"""
-        return await self._request("GET", f"/items/{item_id}")
+        return await self._request("GET", f"/items/{item_id}", user_identifier=user_identifier)
     
     async def record_download(self, item_id: str, user_identifier: str) -> Dict:
         """记录下载"""
@@ -111,7 +111,8 @@ class WorkshopClient:
             json={
                 "instance_id": INSTANCE_ID,
                 "user_identifier": user_identifier
-            }
+            },
+            user_identifier=user_identifier
         )
     
     async def toggle_like(self, item_id: str, user_identifier: str) -> Dict: