fix: 修复连接泄漏、double-put_db、北交所映射缺失

- analysis.py: 6个端点将 put_db(conn) 从 try 移到 finally，异常时不泄漏
- trades.py: 移除 update_trade/delete_trade 中多余的 put_db(conn)，避免 double-put 破坏连接池
- trades.py: stoploss_check 补充北交所(8/9开头)腾讯API代码映射

stock-html/routes/analysis.py

@@ -601,9 +601,10 @@ def batch_technical_signals():
                 scan_map[row['code']] = row
 
             cur.close()
-            put_db(conn)
         except Exception as e:
             print(f"批量扫描获取数据失败: {e}")
+        finally:
+            put_db(conn)
 
         results = []
         errors = []
@@ -919,7 +920,6 @@ def get_scan_results():
                 recommend_counts[disp] = recommend_counts.get(disp, 0) + 1
 
         cur.close()
-        put_db(conn)
 
         return jsonify({
             'success': True,
@@ -939,6 +939,8 @@ def get_scan_results():
         })
     except Exception as e:
         return jsonify({'success': False, 'error': str(e)}), 500
+    finally:
+        put_db(conn)
 
 
 def _compute_recommend(signal_status, indicators, triggered_count, is_holding):
@@ -994,7 +996,6 @@ def signal_alerts():
             WHERE code IN ({placeholders})
         """, stock_codes)
         price_rows = cur.fetchall()
-        put_db(conn)
 
         price_map = {}
         change_map = {}
@@ -1076,6 +1077,8 @@ def signal_alerts():
         import traceback
         traceback.print_exc()
         return jsonify({'success': False, 'error': str(e)}), 500
+    finally:
+        put_db(conn)
 
 
 def _is_scan_running():
@@ -1140,7 +1143,6 @@ def get_scan_status():
         triggered = cur.fetchone()[0]
 
         cur.close()
-        put_db(conn)
 
         return jsonify({
             'success': True,
@@ -1154,6 +1156,8 @@ def get_scan_status():
         })
     except Exception as e:
         return jsonify({'success': False, 'error': str(e)}), 500
+    finally:
+        put_db(conn)
 
 
 @bp.route('/start_full_scan', methods=['POST'])
@@ -1225,7 +1229,6 @@ def get_scan_strategy():
         """, (scan_date,))
         rows = cur.fetchall()
         cur.close()
-        put_db(conn)
 
         tier1, tier2, tier3, tier4 = [], [], [], []
         for r in rows:
@@ -1306,6 +1309,8 @@ def get_scan_strategy():
         })
     except Exception as e:
         return jsonify({'success': False, 'error': str(e)}), 500
+    finally:
+        put_db(conn)
 
 
 def _get_kline_data(stock_code, days=120):
@@ -1357,8 +1362,6 @@ def get_bull_stocks():
         for p in cur.fetchall():
             price_map[p['code']] = {'price': float(p['price']), 'change_pct': float(p.get('change_pct') or 0)}
 
-        put_db(conn)
-
         # ---- 批量计算综合评分 ----
         scores_map = None
         try:
@@ -1420,6 +1423,8 @@ def get_bull_stocks():
         import traceback
         traceback.print_exc()
         return jsonify({'success': False, 'error': str(e)}), 500
+    finally:
+        put_db(conn)
 
 
 def _llm_polish_summary(stock_name, stock_code, ai_summary, score, verdict):