feat(desktop): stop the daemon when you quit the app (#2454)

Quitting the desktop app now shuts down the daemon it started, so
"restart the app" is a complete reset users can act on without first
learning what a daemon is. The old default kept it alive; the toggle
under Settings > Host still opts back in.

Existing installs already persisted `keepRunningAfterQuit: true` from
the old default, so a new default alone would only reach fresh installs.
A one-time migration resets it, and an explicit toggle afterwards
persists the migration flag and is never overridden again.

Only a desktop-managed daemon is stopped — one started with
`paseo daemon start` is left alone.

packages/app/src/desktop/settings/desktop-settings.ts

@@ -28,7 +28,7 @@ export const DEFAULT_DESKTOP_SETTINGS: DesktopSettings = {
   releaseChannel: "stable",
   daemon: {
     manageBuiltInDaemon: true,
-    keepRunningAfterQuit: true,
+    keepRunningAfterQuit: false,
   },
 };
 

packages/app/src/hooks/use-settings/fakes.ts

@@ -31,7 +31,7 @@ const DEFAULT_DESKTOP: DesktopSettings = {
   releaseChannel: "stable",
   daemon: {
     manageBuiltInDaemon: true,
-    keepRunningAfterQuit: true,
+    keepRunningAfterQuit: false,
   },
 };