feat(widgets): add frontend widget runtime (types, API, hooks, registry, components)
PR 3 of 4 for configurable dashboard widgets.
- Add TypeScript widget interfaces (WidgetInstance, WidgetInstanceInput,
WidgetTypeInfo, WidgetDataResponse).
- Create widget API client for CRUD, registry metadata, and per-widget data.
- Create TanStack Query hooks for instances, data, sources, types, and mutations.
- Create closed frontend widget registry with metadata, source type, refresh
intervals, and config fields.
- Add six shadcn/ui-based widget components: Jellyfin, Backups, Grafana link,
Prometheus metric, SSH task output, and static text.
- Add Vitest unit tests for registry metadata.
Verification:
- backend ruff clean; pytest 200 passed
- frontend npm run lint: 0 errors
- frontend npm run build: success
- frontend npm run test -- src/widgets/registry.test.ts: 3 passed
Developer
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