删除永续下单监控与划转强平，保留关键位监控并完成回归审计。

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

lib/instance/instance_display_prefs_lib.py

@@ -10,7 +10,7 @@ DISPLAY_RUNTIME_PREFIX = "display."
 DEFAULT_INSTANCE_DISPLAY: dict[str, bool] = {
     "show_nav_dashboard": False,
     "show_nav_account_ledger": False,
-    "show_nav_key_monitor": False,  # 永续关键位已下线
+    "show_nav_key_monitor": True,  # 关键位监控保留
     "show_nav_trade": False,  # 永续实盘下单已下线
     "show_nav_strategy": False,
     "show_nav_strategy_records": False,
@@ -111,8 +111,8 @@ def display_prefs_template_context(get_db: Callable) -> dict[str, Any]:
 def tab_allowed(tab: str, display: Optional[dict[str, bool]] = None) -> bool:
     prefs = normalize_display_prefs(display or {})
     t = (tab or "").strip()
-    if t in ("trade", "records", "stats", "hedge_plan", "key_monitor"):
-        return False  # 永续相关页面已下线
+    if t in ("trade", "records", "stats", "hedge_plan"):
+        return False  # 永续下单/记录/统计已下线;关键位监控保留
     key = NAV_TAB_ALLOWED.get(t)
     if not key:
         return True
@@ -123,6 +123,7 @@ def display_meta_for_ui() -> list[dict[str, Any]]:
     nav_keys = [
         "show_nav_dashboard",
         "show_nav_account_ledger",
+        "show_nav_key_monitor",
         "show_nav_risk_policy",
         "show_nav_live_guide",
         "show_nav_system_guide",