# Changes summary (2026-02-11)

Implemented strict `lot_category` flow using `pricelist_items.lot_category` only (no parsing from `lot_name`), plus local caching and backfill:

1. Local DB schema + migrations
- Added `lot_category` column to `local_pricelist_items` via `LocalPricelistItem` model.
- Added local migration `2026_02_11_local_pricelist_item_category` to add the column if missing and create indexes:
  - `idx_local_pricelist_items_pricelist_lot (pricelist_id, lot_name)`
  - `idx_local_pricelist_items_lot_category (lot_category)`

2. Server model/repository
- Added `LotCategory` field to `models.PricelistItem`.
- `PricelistRepository.GetItems` now sets `Category` from `LotCategory` (no parsing from `lot_name`).

3. Sync + local DB helpers
- `SyncPricelistItems` now saves `lot_category` into local cache via `PricelistItemToLocal`.
- Added `LocalDB.CountLocalPricelistItemsWithEmptyCategory` and `LocalDB.ReplaceLocalPricelistItems`.
- Added `LocalDB.GetLocalLotCategoriesByServerPricelistID` for strict category lookup.
- Added `SyncPricelists` backfill step: for used active pricelists with empty categories, force refresh items from server.

4. API handler
- `GET /api/pricelists/:id/items` returns `category` from `local_pricelist_items.lot_category` (no parsing from `lot_name`).

5. Article category foundation
- New package `internal/article`:
  - `ResolveLotCategoriesStrict` pulls categories from local pricelist items and errors on missing category.
  - `GroupForLotCategory` maps only allowed codes (CPU/MEM/GPU/M2/SSD/HDD/EDSFF/HHHL/NIC/HCA/DPU/PSU/PS) to article groups; excludes `SFP`.
  - Error type `MissingCategoryForLotError` with base `ErrMissingCategoryForLot`.

6. Tests
- Added unit tests for converters and article category resolver.
- Added handler test to ensure `/api/pricelists/:id/items` returns `lot_category`.
- Added sync test for category backfill on used pricelist items.
- `go test ./...` passed.

Additional fixes (2026-02-11):
- Fixed article parsing bug: CPU/GPU parsers were swapped in `internal/article/generator.go`. CPU now uses last token from CPU lot; GPU uses model+memory from `GPU_vendor_model_mem_iface`.
- Adjusted configurator base tab layout to align labels on the same row (separate label row + input row grid).

UI rule (2026-02-19):
- In all breadcrumbs, truncate long specification/configuration names to 16 characters using ellipsis.