fix: advice-negation downgrades buy signal to guanzhu

mofin_db.py

@@ -1134,6 +1134,18 @@ def reconcile_signal_from_analysis(conn, code: str) -> str:
                 break
         if verdict:
             new_sig = verdict
+            # ── 矛盾降级（2026-07-24 老爸：688660综合结论=买入但操作建议说"继续空仓观望暂不执行"）──
+            # 【综合结论】给方向，【操作建议】给执行。操作建议明确否定买入时，
+            # 以操作建议为准——信号降级为关注，tag/exec 一律不许升。
+            if new_sig in ("买入", "可买入", "可加仓"):
+                _NEG_ADVICE = ("继续空仓", "暂不执行", "不宜买入", "不买入", "不建仓", "不新建仓",
+                               "等待企稳", "暂缓买入", "保持空仓", "维持空仓", "不建议买入", "空仓观望")
+                for line in fa.split("\n"):
+                    if "【操作建议】" in line or line.strip().startswith("【操作建议】"):
+                        if any(k in line for k in _NEG_ADVICE):
+                            new_sig = "关注"
+                            print(f"  [RECONCILE] {code} 操作建议否定买入('{line.strip()[:40]}')，信号降级为关注", flush=True)
+                        break
         elif old_sig in ("买入", "可买入", "可加仓"):
             new_sig = ""  # 无裁决且陈旧动作信号 → 清除
         else: