fix: CTP登录冷却持久化到数据库，取消页面自动连并刷新JS缓存

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

app.py

@@ -205,7 +205,9 @@ def require_nav(key: str):
 
 @app.context_processor
 def inject_globals():
-    return {"nav_items": get_nav_items(get_setting)}
+    trade_js = os.path.join(os.path.dirname(os.path.abspath(__file__)), "static", "js", "trade.js")
+    asset_v = str(int(os.path.getmtime(trade_js))) if os.path.isfile(trade_js) else "0"
+    return {"nav_items": get_nav_items(get_setting), "asset_v": asset_v}
 
 
 def _trading_mode() -> str:
@@ -1714,9 +1716,16 @@ def settings():
 
             save_ctp_settings_from_form(request.form, set_setting)
             try:
-                from vnpy_bridge import get_bridge
+                from vnpy_bridge import get_bridge, _persist_last_error
 
-                get_bridge().mark_disconnected()
+                b = get_bridge()
+                b.mark_disconnected()
+                if (request.form.get("simnow_password") or "").strip() or (
+                    request.form.get("ctp_live_password") or ""
+                ).strip():
+                    b._clear_login_cooldown()
+                    b._last_error = ""
+                    _persist_last_error("")
             except Exception:
                 pass
             flash("CTP 配置已保存，请在持仓监控页重连 CTP")