fix(app): make settings navigation deterministic

Settings detail screens must return to their logical parent regardless of the route used to enter them. Keep compact navigation in the header while preserving the desktop project-list affordance.

packages/app/src/components/left-sidebar.tsx

@@ -68,9 +68,9 @@ import {
   buildSchedulesRoute,
   buildSessionsRoute,
   buildSettingsAddHostRoute,
-  buildSettingsHostSectionRoute,
   buildSettingsRoute,
 } from "@/utils/host-routes";
+import { openHostOverview } from "@/navigation/settings-navigation";
 import type { ShortcutKey } from "@/utils/format-shortcut";
 import { SidebarAgentListSkeleton } from "./sidebar-agent-list-skeleton";
 import { SidebarCalloutSlot } from "./sidebar-callout-slot";
@@ -198,13 +198,13 @@ export const LeftSidebar = memo(function LeftSidebar({ active }: { active: boole
   const handleOpenHostSettingsMobile = useCallback(
     (serverId: string) => {
       showMobileAgent();
-      router.push(buildSettingsHostSectionRoute(serverId, "connections"));
+      openHostOverview(serverId);
     },
     [showMobileAgent],
   );
 
   const handleOpenHostSettingsDesktop = useCallback((serverId: string) => {
-    router.push(buildSettingsHostSectionRoute(serverId, "connections"));
+    openHostOverview(serverId);
   }, []);
 
   const handleHomeMobile = useCallback(() => {