行情K线：分类主力选择、图表指标与布局稳定

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

market.py

@@ -66,7 +66,23 @@ def _fetch_sina_raw(sina_code: str) -> Optional[dict]:
             return None
         price = float(parts[8])
         volume = float(parts[14]) if len(parts) > 14 and parts[14] else 0
-        return {"name": parts[0], "price": price, "volume": volume}
+        prev_close = None
+        if len(parts) > 9 and parts[9]:
+            try:
+                prev_close = float(parts[9])
+            except ValueError:
+                pass
+        if prev_close is None and len(parts) > 2 and parts[2]:
+            try:
+                prev_close = float(parts[2])
+            except ValueError:
+                pass
+        return {
+            "name": parts[0],
+            "price": price,
+            "volume": volume,
+            "prev_close": prev_close,
+        }
     except Exception as exc:
         logger.debug("sina fetch failed %s: %s", sina_code, exc)
         return None