Session 2026-04-19: Navigation, Kompass, Übungsfortschritt

Routen-Navigation:
- POI-Marker: farbige Kreise mit Phosphor-Icons (wie Hauptkarte)
- Screensaver: Navi-Pfeil dreht sich via DeviceOrientationEvent (iOS+Android)
- Pfeil-Dämpfung: EMA α=0.12 mit Wrap-Around
- GPS-Distanz-Bug: Fortschritt nur wenn <500m zur Route
- fitBounds: User-Position nur wenn <20km von Route
- Screensaver: "zur Route" vs "verbleibend" kontextabhängig
- Richtungspfeile entlang Route (blau, max 7 Stück)
- Umkehren ins Route-Detail verschoben, Detail-Map rebuildet sich
- rk-header z-index:10 (Leaflet-Tiles liefen drüber)
- 2-Sek. Screensaver-Entsperrung

km-Tracking:
- route_walks Tabelle
- POST /api/routes/{id}/walked (≥50%)
- total_km = erstellte Routes + gelaufene route_walks
- Toast bei neuem Badge

Übungsfortschritt:
- exercise_progress + training_plan_progress Tabellen
- GET/POST /api/training/progress, /plan-progress, /suggestions
- uebungen.js: API-first + localStorage-Fallback + Auto-Migration
- Empfehlungs-Banner (regelbasiert)
- Toast bei "sitzt"

backend/routes/admin.py

@@ -171,7 +171,11 @@ async def list_users(
                    u.is_moderator, u.is_banned, u.ban_reason,
                    u.created_at, u.last_login,
                    (SELECT COUNT(*) FROM dogs d WHERE d.user_id=u.id) AS dog_count,
-                   (SELECT COUNT(*) FROM forum_threads t WHERE t.user_id=u.id AND t.is_deleted=0) AS thread_count
+                   (SELECT COUNT(*) FROM forum_threads t WHERE t.user_id=u.id AND t.is_deleted=0) AS thread_count,
+                   ROUND(COALESCE((SELECT SUM(r.distanz_km) FROM routes r WHERE r.user_id=u.id), 0), 1) AS total_km,
+                   (SELECT COUNT(*) FROM routes r WHERE r.user_id=u.id) AS route_count,
+                   (SELECT COUNT(*) FROM user_map_pois p WHERE p.user_id=u.id) AS poi_count,
+                   (SELECT MAX(r.created_at) FROM routes r WHERE r.user_id=u.id) AS last_route
             FROM users u
             {where}
             ORDER BY u.created_at DESC