feat: Phase O Windows-native integration + settings search

- Taskbar progress bar: renderer pushes summarizeQueue aggregate over a new
  taskbar:progress channel (App store subscription); setProgressBar normal/error
- System tray (src/main/tray.ts) + minimize-to-tray (Settings.minimizeToTray);
  close hides to tray, isQuitting guards real exits; icon via getAppIconPath()
  (build/icon.ico added to extraResources)
- Jump list: app.setUserTasks "Open AeroFetch" (thumbnail toolbar deferred)
- Settings search: filters the ~11 SettingsView cards live by text match

Overlay badge deferred (needs a drawn NativeImage). typecheck + test (192) +
build all clean. Roadmap: Phase O COMPLETE.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/preload/index.ts

@@ -30,7 +30,8 @@ import {
   type SyncResult,
   type ScheduledSyncStatus,
   type TerminalEvent,
-  type TerminalRunResult
+  type TerminalRunResult,
+  type TaskbarProgress
 } from '@shared/ipc'
 
 // The surface exposed to the renderer. Keep this thin: it only forwards to IPC.
@@ -227,7 +228,11 @@ const api = {
     const listener = (_e: IpcRendererEvent, ev: TerminalEvent): void => cb(ev)
     ipcRenderer.on(IpcChannels.terminalOutput, listener)
     return () => ipcRenderer.removeListener(IpcChannels.terminalOutput, listener)
-  }
+  },
+
+  /** Reflect overall queue progress on the Windows taskbar (fire-and-forget). */
+  setTaskbarProgress: (p: TaskbarProgress): void =>
+    ipcRenderer.send(IpcChannels.taskbarProgress, p)
 }
 
 export type Api = typeof api