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_export_service.py

@@ -8,9 +8,11 @@ Generates Google Shopping compatible CSV files for Letzshop marketplace.
 import csv
 import io
 import logging
+from datetime import UTC, datetime
 
 from sqlalchemy.orm import Session, joinedload
 
+from models.database.letzshop import LetzshopSyncLog
 from models.database.marketplace_product import MarketplaceProduct
 from models.database.product import Product
 
@@ -279,6 +281,53 @@ class LetzshopExportService:
             "atalanda:delivery_method": "",
         }
 
+    def log_export(
+        self,
+        db: Session,
+        vendor_id: int,
+        started_at: datetime,
+        completed_at: datetime,
+        records_processed: int,
+        languages_succeeded: int,
+        languages_failed: int,
+        triggered_by: str,
+        error_details: dict | None = None,
+    ) -> LetzshopSyncLog:
+        """
+        Log an export operation to the sync log.
+
+        Args:
+            db: Database session
+            vendor_id: Vendor ID
+            started_at: When the export started
+            completed_at: When the export completed
+            records_processed: Number of products exported
+            languages_succeeded: Number of languages successfully exported
+            languages_failed: Number of languages that failed
+            triggered_by: Who triggered the export (e.g., "admin:123")
+            error_details: Optional error details if any failures
+
+        Returns:
+            Created LetzshopSyncLog entry
+        """
+        sync_log = LetzshopSyncLog(
+            vendor_id=vendor_id,
+            operation_type="product_export",
+            direction="outbound",
+            status="completed" if languages_failed == 0 else "partial",
+            records_processed=records_processed,
+            records_succeeded=languages_succeeded,
+            records_failed=languages_failed,
+            started_at=started_at,
+            completed_at=completed_at,
+            duration_seconds=int((completed_at - started_at).total_seconds()),
+            triggered_by=triggered_by,
+            error_details=error_details,
+        )
+        db.add(sync_log)
+        db.flush()
+        return sync_log
+
 
 # Singleton instance
 letzshop_export_service = LetzshopExportService()