Frame Control: Mac app, web UI, Android and Steam tooling

Package the Frame Control web UI as an installable Electron Mac app and
bring in the tooling built alongside it.

- app/: Electron wrapper that starts ui/server.py on a free loopback port,
  hardened window (sandbox, no navigation, runAsNode fuse off), login-shell
  PATH so Homebrew tools work from Finder, first-run offer to run
  connect.sh, ad-hoc signed DMG/zip via electron-builder.
- ui/: headset view (OpenVR screenshots), device status, library, Steam
  "Get games" (owned games, install, store search), Android apps as
  persistent Lepton instances with a rated F-Droid catalogue and a private
  compatibility database, Android display controls over ADB, file and
  clipboard transfer, Flatpaks, remote and power actions.
- apk-catalog/, compat-db/, frame/: catalogue build pipeline, Lakebed
  capsule for compatibility reports, Frame-side launchers.
- tests/ and CI: server guard and validation tests plus Steam helper tests,
  run on Python 3.9 with script and app syntax checks.
- Docs: README leads with the Mac app; new Android, panels, Steam games and
  field-notes docs; security notes on LAN-exposed ADB ports.

Screenshot values for the headset's IP and Wi-Fi name are placeholders.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

compat-db/client/index.tsx

@@ -0,0 +1,9 @@
+// No browser access to the data: Frame Control reads and writes it through the
+// key-protected /v1 endpoints only.
+export function App() {
+  return (
+    <main className="min-h-screen grid place-items-center bg-slate-900 text-slate-300 p-8">
+      <p>Frame compatibility database. Private: only Frame Control can use it.</p>
+    </main>
+  );
+}