fix: 修复 market.py _put_db 拼写错误和多处连接泄漏

- market.py:308: _put_db(conn) → put_db(_conn) 修复函数名和变量名拼写错误
- market.py: get_fundamental put_db 移到 finally，初始化 conn=None 防 NameError
- admin.py: kline_sync_status 和 admin_scan_status put_db 移到 finally

stock-html/routes/admin.py

@@ -782,7 +782,6 @@ def kline_sync_status():
         total_stocks = cur.fetchone()[0]
 
         cur.close()
-        put_db(conn)
 
         is_running = _is_kline_sync_running()
 
@@ -858,6 +857,8 @@ def kline_sync_status():
         })
     except Exception as e:
         return jsonify({'success': False, 'error': str(e)}), 500
+    finally:
+        put_db(conn)
 
 
 # ========== 定时任务监控 ==========
@@ -1301,7 +1302,6 @@ def admin_scan_status():
         triggered = cur.fetchone()[0]
 
         cur.close()
-        put_db(conn)
 
         is_running = _is_scan_running()
 
@@ -1350,3 +1350,5 @@ def admin_scan_status():
         })
     except Exception as e:
         return jsonify({'success': False, 'error': str(e)}), 500
+    finally:
+        put_db(conn)

stock-html/routes/market.py

@@ -305,7 +305,7 @@ def get_fund_flow_rank():
                 return jsonify({'success': True, 'data': flow_data, 'total': len(flow_data),
                                 'source': 'cache'})
             finally:
-                _put_db(conn)
+                put_db(_conn)
         
         return jsonify({'success': True, 'data': [], 'total': 0})
     except Exception as e:
@@ -324,6 +324,7 @@ def get_fundamental(stock_code):
         realtime_data = None
         signal_data = None
         
+        conn = None
         try:
             conn = get_db()
             if conn:
@@ -388,10 +389,10 @@ def get_fundamental(stock_code):
                         'indicators': ind,
                         'triggered_count': sig_row[2] or 0,
                     }
-                
-                put_db(conn)
         except Exception as e:
             print(f"获取数据失败: {e}")
+        finally:
+            put_db(conn)
         
         # 优先从数据库获取当日缓存
         cached = db_get_fundamental(stock_code)