Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

The renderer's capture-phase Cmd+Q handler ran on macOS too (despite its
comment), where preventDefault suppressed the menu's quit accelerator and
window.close() merely closed the window — macOS keeps apps alive on
window-all-closed, so the app lingered in the dock with the hook server,
MCP registration, and scheduler still active. Route the hotkey through a
new app:quit IPC that calls app.quit(), so the full before-quit
saveAndCleanup (session save, PTY teardown, skill-command cleanup,
scheduler/hook/watcher/embed shutdown, MCP unregister, plugin uninstall)
runs on every platform.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

- Carve out overlay controls (New schedule, drawer close buttons, project
  picker) with titlebar-no-drag so the window-level drag strip beneath the
  view-mode titlebars no longer swallows their clicks
- Offset the file explorer header past the macOS traffic lights
- Stop file explorer up-navigation from stranding the user above an allowed
  root by checking the parent is an accessible directory first

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>