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/changes/.pi-map.index.md

@@ -2,7 +2,7 @@
 dir: openspec/changes
 
 ## role
-Directory for tracking proposed and applied changes to the project's OpenAPI specification.
+No files present in this directory; appears to be an empty or placeholder directory likely intended for OpenSpec change tracking artifacts.
 ## parent
 index: openspec/.pi-map.index.md
 map: openspec/.pi-map.md
@@ -10,6 +10,12 @@ map: openspec/.pi-map.md
 - openspec/changes/archive
   index: openspec/changes/archive/.pi-map.index.md
   map: openspec/changes/archive/.pi-map.md
+- openspec/changes/mobile-responsive-parity
+  index: openspec/changes/mobile-responsive-parity/.pi-map.index.md
+  map: openspec/changes/mobile-responsive-parity/.pi-map.md
+- openspec/changes/services-as-hub-ia
+  index: openspec/changes/services-as-hub-ia/.pi-map.index.md
+  map: openspec/changes/services-as-hub-ia/.pi-map.md
 ## files
 ## links
 index: openspec/changes/.pi-map.index.md