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/diagnostics/app-diagnostic-report.test.ts

@@ -1,5 +1,9 @@
 import { describe, expect, test } from "vitest";
-import { formatHostRuntimeSection, redactAppDiagnosticReport } from "./app-diagnostic-report";
+import {
+  formatHostRuntimeSection,
+  formatServerInfoSection,
+  redactAppDiagnosticReport,
+} from "./app-diagnostic-report";
 import type { HostRuntimeSnapshot } from "@/runtime/host-runtime";
 import type { HostProfile } from "@/types/host-connection";
 
@@ -41,6 +45,18 @@ function makeHost(): HostProfile {
 }
 
 describe("app diagnostics report", () => {
+  test("reports whether the connected daemon is managed by Paseo Desktop", () => {
+    const report = formatServerInfoSection({
+      status: "server_info",
+      serverId: "srv-desktop-managed",
+      hostname: "desktop-host.local",
+      version: "0.1.108",
+      desktopManaged: true,
+    });
+
+    expect(report).toContain("Desktop managed: yes");
+  });
+
   test("formats connection rows without raw connection details", () => {
     const host = makeHost();
     const snapshot: HostRuntimeSnapshot = {