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.

openspec/specs/.pi-map.index.md

@@ -2,11 +2,17 @@
 dir: openspec/specs
 
 ## role
-Directory for OpenAPI/Swagger specification files defining API contracts, schemas, and endpoint documentation.
+Specification directory defining project standards, schemas, or API contracts.
 ## parent
 index: openspec/.pi-map.index.md
 map: openspec/.pi-map.md
 ## children
+- openspec/specs/prometheus-charting
+  index: openspec/specs/prometheus-charting/.pi-map.index.md
+  map: openspec/specs/prometheus-charting/.pi-map.md
+- openspec/specs/service-storage
+  index: openspec/specs/service-storage/.pi-map.index.md
+  map: openspec/specs/service-storage/.pi-map.md
 - openspec/specs/web-ui
   index: openspec/specs/web-ui/.pi-map.index.md
   map: openspec/specs/web-ui/.pi-map.md