feat: enhance GenericVerifiableCredential interface with explicit optional properties

- Add name, description, and agent as optional properties to GenericVerifiableCredential
- Improve type safety and IntelliSense for common claim properties
- Maintain backward compatibility with existing code
- Reduce need for type assertions when accessing claim properties

src/services/platforms/CapacitorPlatformService.ts

@@ -42,7 +42,7 @@ interface QueuedOperation {
  */
 export class CapacitorPlatformService implements PlatformService {
   /** Current camera direction */
-  private currentDirection: CameraDirection = "BACK";
+  private currentDirection: CameraDirection = CameraDirection.Rear;
 
   private sqlite: SQLiteConnection;
   private db: SQLiteDBConnection | null = null;
@@ -702,7 +702,10 @@ export class CapacitorPlatformService implements PlatformService {
    * @returns Promise that resolves when the camera is rotated
    */
   async rotateCamera(): Promise<void> {
-    this.currentDirection = this.currentDirection === "BACK" ? "FRONT" : "BACK";
+    this.currentDirection =
+      this.currentDirection === CameraDirection.Rear
+        ? CameraDirection.Front
+        : CameraDirection.Rear;
     logger.debug(`Camera rotated to ${this.currentDirection} camera`);
   }