- Add resource_module field to product_category model (stores module name like 'llmage')
- Add resource_module appcode with llmage/supplychain entries to init/data.json
- Add '添加子产品类和产品导入' toolbar tool to tree CRUD (json + generated index.ui)
- Create import_category_products.dspy API endpoint
- Add import_categories_and_products() generic import engine to core.py
- Register import function on ServerEnv
- Update load_path.py with new API endpoint