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/screens/settings-screen.tsx

@@ -121,27 +121,18 @@ import {
   useEnableBuiltInDaemonOption,
 } from "@/desktop/hooks/use-enable-built-in-daemon-option";
 import {
-  buildOpenProjectRoute,
   buildSettingsHostSectionRoute,
   buildSettingsSectionRoute,
   type HostSectionSlug,
   type SettingsSectionSlug,
 } from "@/utils/host-routes";
-import {
-  navigateToLastWorkspace,
-  useLastWorkspaceSelection,
-} from "@/stores/navigation-active-workspace-store";
+import { useLastWorkspaceSelection } from "@/stores/navigation-active-workspace-store";
+import { returnFromSettings, type SettingsView } from "@/navigation/settings-navigation";
 
 // ---------------------------------------------------------------------------
 // View model
 // ---------------------------------------------------------------------------
 
-export type SettingsView =
-  | { kind: "root" }
-  | { kind: "section"; section: SettingsSectionSlug }
-  | { kind: "host"; serverId: string; section: HostSectionSlug }
-  | { kind: "project"; serverId: string; projectId: string };
-
 interface SidebarSectionItem {
   id: SettingsSectionSlug;
   labelKey: string;
@@ -1367,29 +1358,13 @@ export default function SettingsScreen({ view, openAddHostIntent = null }: Setti
     }
   }, [isCompactLayout, router]);
 
-  const handleBackToRoot = useCallback(() => {
-    if (router.canGoBack()) {
-      router.back();
-    } else {
-      router.replace("/settings");
-    }
-  }, [router]);
-
-  const detailProjectServerId = view.kind === "project" ? view.serverId : null;
   const handleBackFromDetail = useCallback(() => {
-    if (detailProjectServerId) {
-      router.navigate(buildSettingsHostSectionRoute(detailProjectServerId, "projects"));
-      return;
-    }
-    handleBackToRoot();
-  }, [detailProjectServerId, handleBackToRoot, router]);
+    returnFromSettings(view);
+  }, [view]);
 
   const handleBackToWorkspace = useCallback(() => {
-    if (navigateToLastWorkspace()) {
-      return;
-    }
-    router.replace(buildOpenProjectRoute());
-  }, [router]);
+    returnFromSettings({ kind: "root" });
+  }, []);
 
   const detailHeader = ((): {
     title: string;
@@ -1417,7 +1392,14 @@ export default function SettingsScreen({ view, openAddHostIntent = null }: Setti
       return renderHostSettingsContent(view, handleHostRemoved);
     }
     if (view.kind === "project") {
-      return <ProjectSettingsScreen serverId={view.serverId} projectId={view.projectId} />;
+      return (
+        <ProjectSettingsScreen
+          serverId={view.serverId}
+          projectId={view.projectId}
+          onBackToProjects={handleBackFromDetail}
+          showBackToProjects={!isCompactLayout}
+        />
+      );
     }
     if (view.kind === "section") {
       switch (view.section) {