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/client/src/styles/global.scss

@@ -132,42 +132,6 @@ body {
   color: $accent-primary;
 }
 
-.hermes-desktop-pet-window,
-.hermes-desktop-pet-window body,
-.hermes-desktop-pet-window #app {
-  background: transparent !important;
-  background-color: transparent !important;
-}
-
-// Teleported overlays must remain clickable above Electron drag regions.
-.hermes-desktop-shell {
-  .n-drawer,
-  .n-drawer *,
-  .n-modal,
-  .n-modal *,
-  .n-dialog,
-  .n-dialog *,
-  .n-popover,
-  .n-popover *,
-  .n-dropdown,
-  .n-dropdown *,
-  .n-select-menu,
-  .n-select-menu *,
-  .n-base-select-menu,
-  .n-base-select-menu *,
-  .n-message-container,
-  .n-message-container *,
-  .n-notification-container,
-  .n-notification-container *,
-  .drawer-overlay,
-  .drawer-panel,
-  .drawer-panel * {
-    -webkit-app-region: no-drag;
-  }
-}
-
-
-
 code, pre, .mono {
   font-family: $font-code;
 }