v0.22.0: First-run setup wizard, local infra backup, hub verification

New controller features:
- Web-based setup wizard replaces docker-setup.sh interactive config
  - Dual listener: :8080 (Traefik) + :8081 (direct HTTP for LAN)
  - Drive scanner finds .felhom-infra-backup/ on all block devices
  - Hub recovery pull (GET /api/v1/recovery/{id}) with retrieval password
  - Fresh install: Hub config download or manual wizard
  - CSRF protection, state persistence, Hungarian UI
- Local infra backup written to all connected drives after each backup cycle
  - .felhom-infra-backup/backup.json + metadata.json with SHA256 checksum
- Hub verification: parse customer_blocked from report push response
  - Limited mode after 7 days without verification
- Recovery info page on Settings + recovery-info.txt file generation
- Pending events queue: DR events sent to Hub on next report push
- docker-setup.sh v6.0.0: removed interactive wizard, minimal controller.yaml only

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

controller/internal/web/handlers.go

@@ -1003,6 +1003,12 @@ func (s *Server) settingsData() map[string]interface{} {
 	}
 	data["StoragePaths"] = storageViews
 
+	// Recovery info for emergency section
+	data["RetrievalPassword"] = s.settings.GetRetrievalPassword()
+	data["HubURL"] = s.cfg.Hub.URL
+	data["SupportEmail"] = "support@felhom.eu"
+	data["SupportURL"] = "https://felhom.eu/kapcsolat"
+
 	return data
 }