Manage the built-in daemon from one place in settings (#1938)

* feat(settings): consolidate daemon management into the host page

The app-level Daemon section and the localhost host page rendered the
same daemon card in two places. The host page is now the single home:
the Host sidebar group leads with Overview, and a desktop-only "Enable
built-in daemon" option in the host switcher recovers a removed
localhost connection. Old settings/daemon deep links redirect
(COMPAT-tagged).

* fix(settings): hide daemon recovery option when the server id probe fails

Review feedback: !query.isLoading treated an errored IPC probe as
resolved, so the recovery affordance could show without knowing the
local server id. Replace the resolved-boolean hook with a single
discriminated state hook (loading | error | resolved) — errors hide the
affordance and fall back to the settings root in the redirect. Also
collapses the two query subscriptions per caller into one.

* fix(settings): keep daemon recovery reachable when no hosts remain

Review feedback: removing localhost as the only host takes the settings
sidebar down its no-host branch, which never mounts the host picker —
so the "Enable built-in daemon" option was unreachable in the most
common recovery case. The sidebar now owns the single hook call, passes
it to the picker, and renders the same action as a sidebar row next to
"Add host" when no hosts exist.

* test(e2e): update settings host header to Overview

Test drift: the host section's sidebar/header label was intentionally
renamed to "Overview"; the spec still asserted the old "Host" title.
Also assert the retired app-level Daemon row stays absent.

packages/app/src/desktop/hooks/use-built-in-daemon-management.ts

@@ -34,6 +34,7 @@ interface UseBuiltInDaemonManagementInput {
 interface UseBuiltInDaemonManagementResult {
   isUpdating: boolean;
   toggle: () => void;
+  enable: () => Promise<DaemonManagementToggleResult | null>;
 }
 
 export function useBuiltInDaemonManagement(
@@ -42,12 +43,16 @@ export function useBuiltInDaemonManagement(
   const { t } = useTranslation();
   const { daemonStatus, settings, updateSettings, setStatus, refreshStatus } = input;
   const reportError = useDesktopIpcErrorReporter();
-  const { mutate: toggleDaemonManagement, isPending: isUpdating } = useMutation<
-    DaemonManagementToggleResult,
-    Error
-  >({
-    mutationFn: async () => {
-      const wasManagingDaemon = settings.manageBuiltInDaemon;
+  const {
+    mutate: toggleDaemonManagement,
+    mutateAsync: toggleDaemonManagementAsync,
+    isPending: isUpdating,
+  } = useMutation<DaemonManagementToggleResult, Error, { forceEnable: boolean }>({
+    mutationFn: async ({ forceEnable }) => {
+      // forceEnable takes the enable branch regardless of the persisted
+      // setting — the recovery affordance must never reach the stop/confirm
+      // path even if manageBuiltInDaemon was left true.
+      const wasManagingDaemon = forceEnable ? false : settings.manageBuiltInDaemon;
       try {
         const result = await executeDaemonManagementToggle(wasManagingDaemon, daemonStatus, {
           confirm: () =>
@@ -109,8 +114,21 @@ export function useBuiltInDaemonManagement(
       return;
     }
 
-    toggleDaemonManagement();
+    toggleDaemonManagement({ forceEnable: false });
   }, [isUpdating, toggleDaemonManagement]);
 
-  return { isUpdating, toggle };
+  const enable = useCallback(async () => {
+    if (isUpdating) {
+      return null;
+    }
+
+    try {
+      return await toggleDaemonManagementAsync({ forceEnable: true });
+    } catch {
+      // onError has already surfaced the failure; callers only act on success.
+      return null;
+    }
+  }, [isUpdating, toggleDaemonManagementAsync]);
+
+  return { isUpdating, toggle, enable };
 }

packages/app/src/desktop/hooks/use-enable-built-in-daemon-option.ts

@@ -0,0 +1,46 @@
+import { useCallback } from "react";
+import { router } from "expo-router";
+import { getIsElectron } from "@/constants/platform";
+import { useLocalDaemonServerIdState } from "@/hooks/use-is-local-daemon";
+import { useHosts } from "@/runtime/host-runtime";
+import { useDesktopSettings } from "@/desktop/settings/desktop-settings";
+import { useDaemonStatus } from "@/desktop/hooks/use-daemon-status";
+import { useBuiltInDaemonManagement } from "@/desktop/hooks/use-built-in-daemon-management";
+import { buildSettingsHostSectionRoute } from "@/utils/host-routes";
+
+export interface EnableBuiltInDaemonOption {
+  visible: boolean;
+  onPress: () => void;
+}
+
+export function useEnableBuiltInDaemonOption(): EnableBuiltInDaemonOption {
+  const isElectron = getIsElectron();
+  const localDaemon = useLocalDaemonServerIdState();
+  const hosts = useHosts();
+  const { settings, updateSettings } = useDesktopSettings();
+  const { data, setStatus, refetch } = useDaemonStatus();
+  const { enable } = useBuiltInDaemonManagement({
+    daemonStatus: data?.status ?? null,
+    settings: settings.daemon,
+    updateSettings: (updates) => updateSettings({ daemon: updates }),
+    setStatus,
+    refreshStatus: refetch,
+  });
+
+  const isLocalhostConfigured =
+    localDaemon.status === "resolved" &&
+    localDaemon.serverId !== null &&
+    hosts.some((host) => host.serverId === localDaemon.serverId);
+  const visible = isElectron && localDaemon.status === "resolved" && !isLocalhostConfigured;
+
+  const onPress = useCallback(() => {
+    void (async () => {
+      const result = await enable();
+      if (result?.kind === "enabled") {
+        router.push(buildSettingsHostSectionRoute(result.newStatus.serverId, "host"));
+      }
+    })();
+  }, [enable]);
+
+  return { visible, onPress };
+}