- Use usePluginToolbarStore((s) => s.registerItems) selector pattern
- Remove store functions from useEffect dependency array
- Store functions are stable references from zustand selectors
- Add pluginToolbarStore for plugin toolbar item registration
- Add PluginToolbar component (slim ribbon bar under TopBar)
- Update AppShell to render PluginToolbar between TopBar and content
- Mail page registers toolbar items (account select, search, compose, sync, settings)
- Remove old mail top bar, use plugin toolbar instead
- Fix mail response: arrays for addresses, add from_name/body_html/sanitized_html/date
Agent Zero