--- server.py
+++ server.py
@@ -2529,6 +2529,20 @@
     except Exception as e:
         raise HTTPException(status_code=502, detail=f"Failed to fetch pattern posts: {e}")
 
+@app.get("/api/pattern/itemsets")
+async def proxy_pattern_itemsets(execution_id: int):
+    """代理获取 itemsets，避免前端直接请求外部域名"""
+    try:
+        async with httpx.AsyncClient(timeout=30.0) as client:
+            resp = await client.get(
+                f"https://pattern.aiddit.com/api/pattern/itemsets?execution_id={execution_id}&page_size=1000",
+            )
+        resp.raise_for_status()
+        return resp.json()
+    except httpx.HTTPStatusError as e:
+        raise HTTPException(status_code=e.response.status_code, detail="Pattern itemsets API returned an error")
+    except Exception as e:
+        raise HTTPException(status_code=502, detail=f"Failed to fetch pattern itemsets: {e}")
 
 @app.get("/")
 def frontend():