incorporates and implements mobile build service functionality.

src/app/admin/admin.component.ts

@@ -126,6 +126,7 @@ export class AdminComponent implements OnInit {
   mobileBuildErrorMessage = '';
   mobileBuildPreflightIssues: string[] = [];
   mobileBuildBusy = false;
+  downloadingArtifactId: number | null = null;
 
   // ── Theme JSON status (mobile build tab) ────────────────────
   readonly themeJsonStatus$ = new BehaviorSubject<ThemeStatus | null>(null);
@@ -451,6 +452,26 @@ export class AdminComponent implements OnInit {
     return `${getAppConfig().apiBaseUrl}${path}`;
   }
 
+  async downloadArtifact(artifact: { id: number; file_name: string }): Promise<void> {
+    try {
+      this.downloadingArtifactId = artifact.id;
+      const blob = await firstValueFrom(this.mobileBuildService.downloadArtifact(artifact.id));
+      const url = window.URL.createObjectURL(blob);
+      const a = document.createElement('a');
+      a.style.display = 'none';
+      a.href = url;
+      a.download = artifact.file_name;
+      document.body.appendChild(a);
+      a.click();
+      window.URL.revokeObjectURL(url);
+      document.body.removeChild(a);
+    } catch {
+      this.mobileBuildErrorMessage = 'Failed to download artifact.';
+    } finally {
+      this.downloadingArtifactId = null;
+    }
+  }
+
   // ── Show CRUD ───────────────────────────────────────────
 
   openShowForm(): void {