Add category management: list API, UI integration, and search updates

README.md

@@ -196,6 +196,9 @@ Expected shapes today:
   Used for item-level edits from stock detail (for example identifier code updates).
 - `GET /{database}/kitchen/locations`
   Returns a nested location tree.
+- `GET /{database}/kitchen/categories`
+  Returns categories (paged). Frontend now resolves category labels from
+  `categories_detail` when present, and falls back to this endpoint by ID.
 
 ## Notes