Desktop: option to minimize to tray / keep running when window is closed

Summary

On Windows, clicking the window close button (x) quits the OpenCode desktop app entirely. When the last window is closed, window-all-closed calls app.quit() (see packages/desktop/src/main/index.ts).

I would like an option so that closing the window minimizes to the system tray / keeps the app running in the background instead of quitting, similar to apps like Slack or Discord. This is useful because ongoing agent runs (long tool calls, background tasks) keep executing, and I don't want to lose them just by clicking the window close button.

Feature request

• Add a setting (e.g. in Settings, or a close_to_tray / minimize_on_close config) that makes the x button hide the window instead of quitting the app.
• Show a tray icon (currently there is no Tray usage in the desktop main process) so the app can be restored from the tray.
• On macOS the existing window-all-closed behavior (app stays running) could stay as-is; this is mainly for Windows/Linux.

Additional context

• Desktop app version: ai.opencode.desktop (Electron-based), package packages/desktop
• Current behavior source: packages/desktop/src/main/index.ts -> app.on("window-all-closed", () => { if (process.platform === "darwin") return; app.quit() })
• No tray or BrowserWindow.hide() usage exists today.

Thanks for considering!