feat: add export job tracking to Letzshop jobs tab

- Export operations now create LetzshopSyncLog entries with type 'product_export'
- Added log_export method to LetzshopExportService (follows architecture rules)
- Updated list_letzshop_jobs to include export jobs
- Added export filter option back to jobs dropdown
- Export jobs display with blue badge and cloud-upload icon

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

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

app/services/letzshop/order_service.py

@@ -708,6 +708,34 @@ class LetzshopOrderService:
                     }
                 )
 
+        # Product exports from letzshop_sync_logs
+        if job_type in (None, "export"):
+            export_query = self.db.query(LetzshopSyncLog).filter(
+                LetzshopSyncLog.vendor_id == vendor_id,
+                LetzshopSyncLog.operation_type == "product_export",
+            )
+            if status:
+                export_query = export_query.filter(LetzshopSyncLog.status == status)
+
+            export_logs = export_query.order_by(
+                LetzshopSyncLog.created_at.desc()
+            ).all()
+
+            for log in export_logs:
+                jobs.append(
+                    {
+                        "id": log.id,
+                        "type": "export",
+                        "status": log.status,
+                        "created_at": log.created_at,
+                        "started_at": log.started_at,
+                        "completed_at": log.completed_at,
+                        "records_processed": log.records_processed or 0,
+                        "records_succeeded": log.records_succeeded or 0,
+                        "records_failed": log.records_failed or 0,
+                    }
+                )
+
         # Sort all jobs by created_at descending
         jobs.sort(key=lambda x: x["created_at"], reverse=True)