fix(rr): 卖出/止盈信号不计算RR(RR是买入区间的盈亏比,对卖无意义)

- recompute_rr检测到卖出信号直接写0返回
- 前端RR=0时显示'—'(已有逻辑)
- 补充: 卖出/止盈/关注/观望等非买入信号RR不显示

mofin_db.py

@@ -1186,6 +1186,16 @@ def recompute_rr(conn, code: str) -> float:
             return 0.0
         el, eh, sl, tp = (row[0] or 0), (row[1] or 0), (row[2] or 0), (row[3] or 0)
 
+        # 卖出/止盈信号：RR（买在区间的盈亏比）对卖出无意义，直接返回0（2026-07-27 老爸）
+        try:
+            _sig_r = conn.execute("SELECT timing_signal FROM holding_strategies WHERE code=? AND status='active'", (code,)).fetchone()
+            if _sig_r and _sig_r[0] in ("卖出", "止盈"):
+                conn.execute("UPDATE holding_strategies SET rr_ratio=0, rr_low=0, rr_high=0 WHERE code=? AND status='active'", (code,))
+                conn.commit()
+                return 0.0
+        except Exception:
+            pass
+
         # 20日新高（前高阻力）
         high_20d = 0.0
         try: