Make remote daemon update failures actionable (#2120)

* fix(settings): show daemon update failures

React Native web ignores Alert.alert, so failed remote updates reset to an enabled button without any user-visible explanation. Keep updater progress and failure as explicit rendered state, including the daemon's error, and cover the real browser-to-daemon failure path.

* test(settings): harden daemon update regression

* fix(settings): disable Desktop-managed daemon updates

Desktop-bundled daemons advertised npm self-update even though the install-origin checks always rejected it. Report Desktop ownership to clients, render actionable guidance, and refuse stale requests before touching npm.

packages/app/src/contexts/session-context.tsx

@@ -951,6 +951,9 @@ function SessionProviderInternal({ children, serverId, client }: SessionProvider
       serverId: serverInfo.serverId,
       hostname: serverInfo.hostname,
       version: serverInfo.version,
+      ...(serverInfo.desktopManaged !== undefined
+        ? { desktopManaged: serverInfo.desktopManaged }
+        : {}),
       ...(serverInfo.capabilities ? { capabilities: serverInfo.capabilities } : {}),
       ...(serverInfo.features ? { features: serverInfo.features } : {}),
     });
@@ -1422,6 +1425,9 @@ function SessionProviderInternal({ children, serverId, client }: SessionProvider
           serverId: serverInfo.serverId,
           hostname: serverInfo.hostname,
           version: serverInfo.version,
+          ...(serverInfo.desktopManaged !== undefined
+            ? { desktopManaged: serverInfo.desktopManaged }
+            : {}),
           ...(serverInfo.capabilities ? { capabilities: serverInfo.capabilities } : {}),
           ...(serverInfo.features ? { features: serverInfo.features } : {}),
         });