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/ui/.pi-map.index.md

@@ -2,7 +2,7 @@
 dir: frontend/src/components/ui
 
 ## role
-Reusable, design-system UI component library providing styled, accessible primitives (buttons, inputs, dialogs, tables, etc.) for consistent application interfaces.
+Reusable UI component library providing styled, accessible primitives (buttons, inputs, dialogs, tables, etc.) for consistent application interfaces.
 ## parent
 index: frontend/src/components/.pi-map.index.md
 map: frontend/src/components/.pi-map.md
@@ -23,13 +23,16 @@ map: frontend/src/components/.pi-map.md
 - dropdown-menu.tsx
 - input.tsx
 - label.tsx
+- mobile-card.tsx
 - progress.tsx
 - scroll-area.tsx
 - select.tsx
 - separator.tsx
+- sheet-form.tsx
 - sheet.tsx
 - skeleton.tsx
 - switch.tsx
+- table-pagination.tsx
 - table.tsx
 - tabs.tsx
 - textarea.tsx