Prevent duplicate strategy trade snapshots on plan close.

Finalize plans before writing snapshots, dedupe on startup and page load, and add a cleanup script for existing repeated rows.

Co-authored-by: Cursor <cursoragent@cursor.com>

strategy_register.py

@@ -12,6 +12,29 @@ from strategy_db import init_strategy_tables
 from strategy_roll_lib import preview_roll
 
 
+def _dedupe_strategy_snapshots_on_startup(cfg: dict[str, Any]) -> None:
+    """启动时清理历史重复快照（同计划同结果仅保留最新一条）。"""
+    get_db = cfg.get("get_db")
+    if not callable(get_db):
+        return
+    try:
+        from strategy_snapshot_lib import dedupe_strategy_snapshots
+
+        conn = get_db()
+        try:
+            removed = dedupe_strategy_snapshots(conn)
+            if removed:
+                conn.commit()
+                print(
+                    f"[strategy] deduped {removed} duplicate strategy_trade_snapshots",
+                    flush=True,
+                )
+        finally:
+            conn.close()
+    except Exception as e:
+        print(f"[strategy] snapshot dedupe skipped: {e}", flush=True)
+
+
 def install_strategy_trading(app: Flask, repo_root: str, app_module: Any = None, **build_kw) -> None:
     """在 app.py 末尾调用（login_required 已定义后）。仅注册 POST API；页面由各 app 的 render_main_page 渲染。"""
     from strategy_config import build_strategy_config
@@ -24,6 +47,7 @@ def install_strategy_trading(app: Flask, repo_root: str, app_module: Any = None,
 
     register_strategy_records(app, cfg)
     app.extensions["strategy_roll_cfg"] = cfg
+    _dedupe_strategy_snapshots_on_startup(cfg)
 
 
 def attach_strategy_templates(app: Flask, repo_root: str) -> None: