Phase 004: remove the desktop shell, website tooling, and bundled hermes CLI

- Drop all desktop/Electron branches, scripts, and UI (title bar, pets,
  desktop bridge); LAN endpoint kind is now web/custom only
- Replace the bundled hermes CLI with user-side installation: add
  GET /api/hermes/cli-status plus a HermesMissingView onboarding guide
- Remove the version-management UI (snapshots handled by git) and prune
  dead website/mcu/claude scripts and lockfile entries

tests/e2e/fixtures.ts

@@ -113,6 +113,11 @@ export async function mockHermesApi(page: Page, options: MockHermesApiOptions =
       return
     }
 
+    if (pathname === '/api/hermes/cli-status') {
+      await route.fulfill(jsonResponse({ available: true, bin: '/usr/bin/hermes' }))
+      return
+    }
+
     if (pathname === '/api/auth/status') {
       await route.fulfill(jsonResponse({ hasPasswordLogin: true, username: 'playwright' }))
       return