fix: add HasVolumeData to AppBackupRow for template rendering

The backups page template references .HasVolumeData on the status table
rows but the AppBackupRow struct was missing this field, causing a
template error.

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

controller/internal/web/handlers.go

@@ -767,10 +767,11 @@ type AppBackupRow struct {
 	StatusText  string // short Hungarian tooltip
 
 	// App characteristics
-	HasHDDData   bool
-	HasDB        bool
-	StorageLabel string
-	HDDSizeHuman string
+	HasHDDData    bool
+	HasDB         bool
+	HasVolumeData bool
+	StorageLabel  string
+	HDDSizeHuman  string
 
 	// What this app's backup contains (for display)
 	// e.g., "DB + Konfiguráció + Adatok", "DB + Konfiguráció", "Konfiguráció"
@@ -871,7 +872,7 @@ func (s *Server) buildAppBackupRows(
 			parts = append(parts, "DB")
 		}
 		parts = append(parts, "Konfig")
-		if app.HasHDDData {
+		if app.HasHDDData || app.HasVolumeData {
 			parts = append(parts, "Adatok")
 		}
 		contents := strings.Join(parts, " + ")
@@ -881,6 +882,7 @@ func (s *Server) buildAppBackupRows(
 			DisplayName:       app.DisplayName,
 			HasHDDData:        app.HasHDDData,
 			HasDB:             hasDB,
+			HasVolumeData:     app.HasVolumeData,
 			DriveDisconnected: driveDisconnected,
 			StorageLabel:   app.StorageLabel,
 			HDDSizeHuman:   app.HDDSizeHuman,