feat: resolver alias de IDs de miembros durante la sincronización de grupos

Co-authored-by: aider (openrouter/openai/gpt-5) <aider@aider.chat>

src/services/group-sync.ts

@@ -499,7 +499,11 @@ export class GroupSyncService {
 			if (!norm) continue;
 			result.push({ userId: norm, isAdmin });
 		}
-		return result;
+		const resolved = (() => {
+			const map = IdentityService.resolveMany(result.map(r => r.userId));
+			return result.map(r => ({ userId: map.get(r.userId) || r.userId, isAdmin: r.isAdmin }));
+		})();
+		return resolved;
 	}
 
 	/**