fix: paper positions use Binance realtime price instead of signal_indicators

backend/main.py

@@ -568,8 +568,20 @@ async def paper_positions(user: dict = Depends(get_current_user)):
         "tp1_price, tp2_price, sl_price, tp1_hit, status, atr_at_entry "
         "FROM paper_trades WHERE status IN ('active','tp1_hit') ORDER BY entry_ts DESC"
     )
-    # 获取实时价格
+    # 从币安API获取实时价格
     prices = {}
+    symbols_needed = list(set(r["symbol"] for r in rows))
+    if symbols_needed:
+        try:
+            async with httpx.AsyncClient(timeout=5) as client:
+                resp = await client.get("https://fapi.binance.com/fapi/v1/ticker/price")
+                if resp.status_code == 200:
+                    for item in resp.json():
+                        if item["symbol"] in symbols_needed:
+                            prices[item["symbol"]] = float(item["price"])
+        except Exception:
+            pass
+    # fallback: 如果币安API失败，用signal_indicators
     for r in rows:
         sym = r["symbol"]
         if sym not in prices: