feat: add import error tracking and translation tabs

Import Error Tracking:
- Add MarketplaceImportError model to store detailed error information
- Store row number, identifier, error type, message, and row data for each error
- Add API endpoint GET /admin/marketplace-import-jobs/{job_id}/errors
- Add UI to view and browse import errors in job details modal
- Support pagination and error type filtering

Translation Tabs:
- Replace flat translation list with tabbed interface on product detail page
- Add language tabs with full language names
- Add copy-to-clipboard functionality for translation content
- Improved UX with better visual separation of translations

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/api/v1/admin/marketplace.py

@@ -19,6 +19,8 @@ from models.schema.marketplace_import_job import (
     AdminMarketplaceImportJobListResponse,
     AdminMarketplaceImportJobRequest,
     AdminMarketplaceImportJobResponse,
+    MarketplaceImportErrorListResponse,
+    MarketplaceImportErrorResponse,
     MarketplaceImportJobRequest,
     MarketplaceImportJobResponse,
 )
@@ -128,3 +130,36 @@ def get_marketplace_import_job(
     """Get a single marketplace import job by ID (Admin only)."""
     job = marketplace_import_job_service.get_import_job_by_id_admin(db, job_id)
     return marketplace_import_job_service.convert_to_admin_response_model(job)
+
+
+@router.get("/{job_id}/errors", response_model=MarketplaceImportErrorListResponse)
+def get_import_job_errors(
+    job_id: int,
+    page: int = Query(1, ge=1),
+    limit: int = Query(50, ge=1, le=100),
+    error_type: str | None = Query(None, description="Filter by error type"),
+    db: Session = Depends(get_db),
+    current_admin: User = Depends(get_current_admin_api),
+):
+    """Get import errors for a specific job (Admin only).
+
+    Returns detailed error information including row number, identifier,
+    error type, error message, and raw row data for review.
+    """
+    # Verify job exists
+    marketplace_import_job_service.get_import_job_by_id_admin(db, job_id)
+
+    # Get errors from service
+    errors, total = marketplace_import_job_service.get_import_job_errors(
+        db=db,
+        job_id=job_id,
+        error_type=error_type,
+        page=page,
+        limit=limit,
+    )
+
+    return MarketplaceImportErrorListResponse(
+        errors=[MarketplaceImportErrorResponse.model_validate(e) for e in errors],
+        total=total,
+        import_job_id=job_id,
+    )