feat: add remote daemon self-update from client (#1513)

* feat: add remote daemon self-update from client

Adds a daemon.update.request RPC that lets the client trigger a remote
daemon update over WebSocket. The daemon runs npm update -g @getpaseo/cli,
reports progress via daemon_update_progress status events, then restarts
through the supervisor to load the new code.

New feature flag server_info.features.daemonSelfUpdate gates the UI.
The UpdateDaemonCard appears on the host settings page when the daemon
supports self-update and the app/daemon versions differ.

* fix: clean up progress subscription on unmount, use typed phase cast

Address Greptile review:
- P1: store unsubscribe ref and clean up on component unmount to prevent
  listener leak during in-flight update
- P2: use DaemonUpdateProgressStatusPayload type instead of { phase?: string }

* fix: use npm install@latest and global concurrency guard

Address Greptile review:
- npm update -g can silently exit 0 without resolving major-version
  gaps; switch to npm install -g @getpaseo/cli@latest
- Move daemonUpdateInProgress from per-session instance to module-level
  variable so concurrent clients share the same guard

* feat(daemon): harden remote self-update

Probe the global npm CLI install before updating, keep request handling in a daemon self-update session controller, and emit scoped daemon.update.progress messages.

* test(daemon): make self-update paths platform-stable

---------

Co-authored-by: Mohamed Boudra <boudra.moha@gmail.com>

packages/app/src/i18n/resources/zh-CN.ts

@@ -1722,6 +1722,30 @@ export const zhCN: TranslationResources = {
           requestFailedMessage: "发送重启请求失败。Paseo 会自动重连，请在 Host 显示在线后重试。",
           dialogFailedMessage: "无法打开重启确认对话框。",
         },
+        update: {
+          title: "Update daemon",
+          hint: "Update the daemon to the latest version and restart it",
+          confirm: "Update",
+          confirmTitle: "Update {{name}}",
+          confirmMessage:
+            "This will update the daemon to the latest version and restart it. Running agents will be briefly interrupted.",
+          updating: "Updating...",
+          phaseStarting: "Preparing update...",
+          phaseDownloading: "Downloading packages...",
+          phaseInstalling: "Installing...",
+          phaseComplete: "Update complete, restarting...",
+          unableToReconnectTitle: "Unable to reconnect",
+          unableToReconnectMessage:
+            "{{name}} did not come back online after updating. Please verify the daemon restarted.",
+          unavailableTitle: "Host unavailable",
+          unavailableMessage:
+            "This host is not connected. Wait for it to come online before updating.",
+          offlineTitle: "Host offline",
+          offlineMessage: "This host is offline. Wait until it is back online before updating.",
+          requestFailedTitle: "Update failed",
+          requestFailedMessage: "Failed to update the daemon: {{error}}",
+          dialogFailedMessage: "Unable to open the update confirmation dialog.",
+        },
         dangerZone: "危险区域",
         remove: {
           title: "移除 Host",