Shell:
- WorkspaceHost: change tooltip from pluginId to human-readable title
- StatusBar: replace pluginId tooltips with label or id (3 occurrences)
- App: startup routing to Today view, sidebar Today nav item
- Sidebar: add Today button in Overview section
- TodaySurface: separate global vs workspace data (no fallthrough)
Plugin API:
- Add workspaces.list() method wrapping App.ListWorkspaces()
(needed by browser-inbox workspace picker)