[FEATURE]: macOS tray icon with background persistence, browser auth, and mobile QR access #18796

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

I run OpenCode as a persistent daemon (after seeing Dax's tweet about it a while ago) and access it from my phone over Wireguard.
I always kept forgetting about it in the background and wanted to have a UI for it.
So I thought, why not add it to the desktop app? :)

Before I invest time cleaning this up for a proper PR, is this something you'd want contributed?
In any case, branch name and screenshots are at the bottom.
Thank you for making OpenCode <3

What I built (branch on my fork, ~600 lines across Rust/TS):

1. Tray icon + background persistence — closing the window hides to tray instead of killing the sidecar.
   Menu: Show App, Open in Browser, Copy Browser URL, Show QR Code, Server Info submenu, Quit. (a lot of options just because i was experimenting, will remove most)
2. Browser access with cookie auth — the server's Basic Auth triggers browser auth dialogs. Solved with a
   /-/launch?token= endpoint that exchanges a launch token for an HMAC-signed HttpOnly session
   cookie (signed with server password, survives server restarts). ~30 lines of server-side changes.
3. QR code — scannable from phone, encodes the authenticated launch URL. In tray menu + settings UI. Uses
   solid-qr-code.
4. Settings UI (Settings > Server) — configurable port, network access toggle (0.0.0.0), external
   hostname override for QR URLs (auto-detects Mac hostname when blank), password with randomize (4-word
   passphrases via random_word crate), Save & Restart.
5. Persistent credentials — passphrase auto-generated and saved to Tauri store on first launch.
   Human-readable like tiger-castle-river-maple.

Caveats:

• Built and tested on macOS only. Uses Tauri's cross-platform tray/menu APIs so it should compile on
  other platforms, but I haven't tested Windows or Linux at all.
• This is vibe-coded slop — built for personal use, not production quality.

Related to

• [FEATURE]: Desktop: Close button should minimize to system tray instead of exiting #18134 (tray/minimize to background)
• qrcode or generic "hook" in web mode for fast mobile access/qr codes/ngrok #10549 (QR code for mobile access). Posting

ndraiman/desktop-tray-icon - https://github.com/ndraiman/opencode/tree/ndraiman/desktop-tray-icon