Watchlist↔Holdings双向自动迁移

regenerate_all() 每次全量重评时自动：
① 自选股变成持仓(>0股) → 从watchlist移除
② 持仓清仓(股数归零) → 自动加回watchlist（有买入区才加）
Dad要求的双向自动同步，避免手动清理遗忘

strategy_lifecycle.py

@@ -1847,6 +1847,41 @@ def regenerate_all(stdout=True):
             _h['change_pct'] = _old.get('change_pct', 0)
     existing_pf["holdings"] = _new_holdings
     existing_pf["updated_at"] = datetime.now().strftime('%Y-%m-%d %H:%M')
+
+    # ── Watchlist ↔ Holdings 双向自动迁移（2026-06-27 Dad要求）──
+    # ① 持仓已有 → 从自选移除（买入自动清除）
+    wl_codes = {s.get("code") for s in wl.get("stocks", []) if s.get("code")}
+    pf_codes = {h.get("code") for h in _new_holdings if h.get("code") and h.get("shares", 0) > 0}
+    removed_from_wl = []
+    for h_code in wl_codes & pf_codes:
+        # 持仓>0且量够 → 自选移除
+        wl["stocks"] = [s for s in wl.get("stocks", []) if s.get("code") != h_code]
+        removed_from_wl.append(h_code)
+    if removed_from_wl and stdout:
+        print(f"  自选→持仓自动移除: {', '.join(removed_from_wl)}")
+
+    # ② 清仓/卖光 → 加回自选（只要仍有关注价值）
+    added_to_wl = []
+    old_pf_codes = {_h.get("code") for _h in existing_pf.get("holdings", []) if _h.get("code")}
+    sold_codes = old_pf_codes - pf_codes  # 曾持仓但现在没有(或不在了)
+    for sc in sold_codes:
+        # 已有自选就不重复加
+        if sc in wl_codes:
+            continue
+        # 从现有decisions看是否有关注价值
+        for d in decisions:
+            if d.get("code") == sc and d.get("entry_low") and d.get("entry_high"):
+                wl["stocks"].append({
+                    "code": sc, "name": d.get("name", sc),
+                    "entry_low": d.get("entry_low"), "entry_high": d.get("entry_high"),
+                    "stop_loss": d.get("stop_loss", 0),
+                    "analysis": {"action": d.get("action", ""), "tech_snapshot": d.get("tech_snapshot", "")}
+                })
+                added_to_wl.append(sc)
+                break
+    if added_to_wl and stdout:
+        print(f"  清仓→自选自动加入: {', '.join(added_to_wl)}")
+
     json.dump(existing_pf, open(PORTFOLIO_PATH, "w"), ensure_ascii=False, indent=2)
     json.dump(wl, open(WATCHLIST_PATH, "w"), ensure_ascii=False, indent=2)