feat: redesign Letzshop products tab with product listing view

Products Tab Changes:
- Converted to product listing page similar to /admin/marketplace-products
- Added Import/Export buttons in header
- Added product stats cards (total, active, inactive, last sync)
- Added search and filter functionality
- Added product table with pagination
- Import modal for single URL or all languages

Settings Tab Changes:
- Moved batch size setting from products tab
- Moved include inactive checkbox from products tab
- Added export behavior info box

Export Changes:
- New POST endpoint exports all languages (FR, DE, EN)
- CSV files written to exports/letzshop/{vendor_code}/ for scheduler pickup
- Letzshop scheduler can fetch files from this location

API Changes:
- Added vendor_id filter to /admin/vendor-products/stats endpoint
- Added POST /admin/vendors/{id}/export/letzshop for folder export

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

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

app/api/v1/admin/vendor_products.py

@@ -206,11 +206,12 @@ def get_vendor_products(
 
 @router.get("/stats", response_model=VendorProductStats)
 def get_vendor_product_stats(
+    vendor_id: int | None = Query(None, description="Filter stats by vendor ID"),
     db: Session = Depends(get_db),
     current_admin: User = Depends(get_current_admin_api),
 ):
     """Get vendor product statistics for admin dashboard."""
-    stats = vendor_product_service.get_product_stats(db)
+    stats = vendor_product_service.get_product_stats(db, vendor_id=vendor_id)
     return VendorProductStats(**stats)
 
 

app/api/v1/admin/vendors.py

@@ -363,3 +363,83 @@ def export_vendor_products_letzshop(
             "Content-Disposition": f'attachment; filename="{filename}"',
         },
     )
+
+
+class LetzshopExportRequest(BaseModel):
+    """Request body for Letzshop export to pickup folder."""
+
+    include_inactive: bool = False
+
+
+@router.post("/{vendor_identifier}/export/letzshop")
+def export_vendor_products_letzshop_to_folder(
+    vendor_identifier: str = Path(..., description="Vendor ID or vendor_code"),
+    request: LetzshopExportRequest = None,
+    db: Session = Depends(get_db),
+    current_admin: User = Depends(get_current_admin_api),
+):
+    """
+    Export vendor products to Letzshop pickup folder (Admin only).
+
+    Generates CSV files for all languages (FR, DE, EN) and places them in a folder
+    that Letzshop scheduler can fetch from. This is the preferred method for
+    automated product sync.
+
+    **Behavior:**
+    - Creates CSV files for each language (fr, de, en)
+    - Places files in: exports/letzshop/{vendor_code}/
+    - Filename format: {vendor_code}_products_{language}.csv
+
+    Returns:
+        JSON with export status and file paths
+    """
+    import os
+    from pathlib import Path as FilePath
+
+    from app.services.letzshop_export_service import letzshop_export_service
+
+    vendor = vendor_service.get_vendor_by_identifier(db, vendor_identifier)
+
+    include_inactive = request.include_inactive if request else False
+
+    # Create export directory
+    export_dir = FilePath(f"exports/letzshop/{vendor.vendor_code.lower()}")
+    export_dir.mkdir(parents=True, exist_ok=True)
+
+    exported_files = []
+    languages = ["fr", "de", "en"]
+
+    for lang in languages:
+        try:
+            csv_content = letzshop_export_service.export_vendor_products(
+                db=db,
+                vendor_id=vendor.id,
+                language=lang,
+                include_inactive=include_inactive,
+            )
+
+            filename = f"{vendor.vendor_code.lower()}_products_{lang}.csv"
+            filepath = export_dir / filename
+
+            with open(filepath, "w", encoding="utf-8") as f:
+                f.write(csv_content)
+
+            exported_files.append({
+                "language": lang,
+                "filename": filename,
+                "path": str(filepath),
+                "size_bytes": os.path.getsize(filepath),
+            })
+        except Exception as e:
+            exported_files.append({
+                "language": lang,
+                "error": str(e),
+            })
+
+    return {
+        "success": True,
+        "message": f"Exported {len([f for f in exported_files if 'error' not in f])} language(s) to {export_dir}",
+        "vendor_code": vendor.vendor_code,
+        "export_directory": str(export_dir),
+        "files": exported_files,
+    }