feat(frontend): slice 2 — migrate 11 shared components to shadcn/Tailwind
Web UI rework. Shared-components slice (drift prevention):
- Migrate SectionCard, SelectionRailCard, TabbedCard, MetricCard,
DiskSpaceCard, HoverEditButton, DialogFooter, ConfirmDialog,
LibraryOverview, NowPlaying, SessionActivityPanel off @mui
- HoverEditButton: MUI IconButton + EditOutlined -> Button + lucide Pencil
- Status mapping uses the success Badge variant (chart-2) for healthy
- Exported APIs preserved so consuming pages still compile (no page edits)
- 11 behavioral Vitest component tests added
Gate: build + lint + test green.
Developer
109e74db41