feat(app-update): Refactor update handling and add manual update dialog

- Modify AppUpdater to separate update dialog logic
- Add new IPC handler for manually showing update dialog
- Update renderer hooks and store to track downloaded update state
- Switch import for UpdateInfo from electron-updater to builder-util-runtime

src/preload/index.d.ts

@@ -15,6 +15,7 @@ declare global {
     api: {
       getAppInfo: () => Promise<AppInfo>
       checkForUpdate: () => Promise<{ currentVersion: string; updateInfo: UpdateInfo | null }>
+      showUpdateDialog: () => Promise<void>
       openWebsite: (url: string) => void
       setProxy: (proxy: string | undefined) => void
       setLanguage: (theme: LanguageVarious) => void

src/preload/index.ts

@@ -8,6 +8,7 @@ const api = {
   reload: () => ipcRenderer.invoke('app:reload'),
   setProxy: (proxy: string) => ipcRenderer.invoke('app:proxy', proxy),
   checkForUpdate: () => ipcRenderer.invoke('app:check-for-update'),
+  showUpdateDialog: () => ipcRenderer.invoke('app:show-update-dialog'),
   setLanguage: (lang: string) => ipcRenderer.invoke('app:set-language', lang),
   setTray: (isActive: boolean) => ipcRenderer.invoke('app:set-tray', isActive),
   restartTray: () => ipcRenderer.invoke('app:restart-tray'),