Document the notarized desktop release and cask

AGENTS.md

@@ -189,14 +189,17 @@ what we take vs. skip). Never vendor it into the build.
 - No third-party deps beyond `github.com/coder/websocket`,
   `golang.org/x/crypto` (ACME), and `fyne.io/fyne/v2` (desktop UI). Keep it
   that way unless a milestone calls for it.
-- **CLI release**: `v0.1.0` (tag on `ebae420`) is published on Gitea with
-  darwin/linux arm64+amd64 tarballs and `checksums.txt`. The Homebrew formula
-  is `tzgyn-tunnel` in `TZGyn/homebrew-tap` (it installs the `tunnel` binary;
-  the name avoids the deprecated core `tunnel` formula). Rebuild with
-  `-X main.version=<version>`, attach all four assets, and update the four
-  URLs/SHAs in the formula on each release. `tunnel up` currently starts a
-  detached process, not a launchd agent (the official CLI's agent was stopped
-  when the live tunnel was switched to this client).
+- **Releases**: `v0.2.0` (tag on `d5689ce`) is published on Gitea with
+  darwin/linux CLI tarballs and a **notarized** `Tunnel-0.2.0.zip`
+  (`spctl` = accepted / `Notarized Developer ID`). Homebrew: formula
+  `tzgyn-tunnel` (CLI, installs `tunnel`) and cask `tzgyn-tunnel-app` (desktop,
+  installs `Tunnel.app`), both in `TZGyn/homebrew-tap`. Rebuild the app with
+  `scripts/build-desktop-app.sh <version>` for a local ad-hoc build, or
+  `scripts/release-desktop-app.sh <version>` for the signed+notarized zip;
+  update both tap files' URLs/SHAs on each release. The app has
+  **Connect on launch** (`auto_connect`); add it to macOS Login Items to
+  reconnect at login. The CLI `tunnel up` remains a detached process; the
+  desktop app runs the service in-process.
 - Milestones: M1 core data path (done); M2 real ACME DNS-01 + renewals (done);
   M3 rate limits/admin/hardening (done); M4 Go client (done); M5 desktop app
   (done). Remaining optional work: launchd/systemd agents for the Go client,

README.md

@@ -107,7 +107,13 @@ On macOS, build and ad-hoc sign a launchable bundle:
 ```bash
 ./scripts/build-desktop-app.sh 0.2.0
 ditto Tunnel.app "$HOME/Applications/Tunnel.app"
-open "$HOME/Applications/Tunnel.app" --args --autostart
+open "$HOME/Applications/Tunnel.app"
+```
+
+Or install the notarized release:
+
+```bash
+brew install --cask tzgyn-tunnel-app
 ```
 
 It uses `~/.config/tunnel/config.json` like the CLI, shows tunnel status and