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

packages/server/src/services/hermes/agent-bridge/manager.ts

@@ -317,10 +317,6 @@ function mergeStartFailureReadinessError(readiness: AgentBridgeReadiness, err: u
   return readinessError || startError
 }
 
-function isDesktopRuntime(): boolean {
-  return String(process.env.HERMES_DESKTOP || '').trim().toLowerCase() === 'true'
-}
-
 function shouldKillStaleIpcBridgeProcesses(): boolean {
   const raw = String(process.env.HERMES_AGENT_BRIDGE_KILL_STALE_IPC || '').trim().toLowerCase()
   return ['1', 'true', 'yes', 'on'].includes(raw)