chore: regenerate stale .pi-map.md / .pi-map.index.md project maps

Project map had drifted: claimed recharts unused (was used), ObservabilityPage.tsx
exists (refactored to service-tabs/), missed JellyfinNowPlayingWidget +
authentik/backups service types. Regenerate to reflect post-change reality:
new Qbittorrent/LineSeriesChart/Prometheus{Gauge,Mean}Widget files,
service_data.py/qbittorrent_store.py, canonical prometheus-charting +
service-storage specs, archived changes.

frontend/src/components/__tests__/.pi-map.index.md

@@ -2,7 +2,7 @@
 dir: frontend/src/components/__tests__
 
 ## role
-Test suite providing unit test coverage for reusable UI components and feature widgets in the frontend.
+Test suite providing unit test coverage for reusable UI components, verifying rendering, user interactions, responsive layouts, and edge cases.
 ## parent
 index: frontend/src/components/.pi-map.index.md
 map: frontend/src/components/.pi-map.md
@@ -11,22 +11,26 @@ map: frontend/src/components/.pi-map.md
 ## files
 - BackupAlertsTable.test.tsx
 - BackupDashboardWidget.test.tsx
+- BackupJobsTable.test.tsx
 - BackupRunsTable.test.tsx
 - ConfirmDialog.test.tsx
 - DialogFooter.test.tsx
 - HoverEditButton.test.tsx
 - LibraryOverview.test.tsx
+- LineSeriesChart.test.tsx
 - MetricCard.test.tsx
 - NowPlaying.test.tsx
+- PinnedServiceLink.test.tsx
 - SectionCard.test.tsx
 - SelectionRailCard.test.tsx
 - SessionActivityPanel.test.tsx
 - TabbedCard.test.tsx
+- WidgetConfigDialog.test.tsx
 ## links
 index: frontend/src/components/__tests__/.pi-map.index.md
 map: frontend/src/components/__tests__/.pi-map.md
 ## workflows
 - update __tests__ tests
-  read: BackupAlertsTable.test.tsx, BackupDashboardWidget.test.tsx, BackupRunsTable.test.tsx
+  read: BackupAlertsTable.test.tsx, BackupDashboardWidget.test.tsx, BackupJobsTable.test.tsx
 ## dirty
 -