fix(FN-373): stop stack reset on every render in CategoryGrid

useTranslation returns a fresh `t` each render, so including it in the
useEffect deps caused the effect to re-fire continuously, resetting the
drill-down stack immediately after handleSelect pushed a child level.
Result: clicking a parent category in grid view did nothing — no API
call, no UI change, no navigation. Reproduced via Playwright on
dev.sase.tr.

Drop `t` from the dep array (key is static; locale changes mid-session
are rare and acceptable to render stale until the next prop change).

apps/web/src/components/categories/category-grid.tsx

@@ -53,10 +53,15 @@ export function CategoryGrid({
   const [imageOverrides, setImageOverrides] = useState<Map<string, string>>(new Map());
   const prefetchedRef = useRef<Set<string>>(new Set());
 
-  // Reset stack when input categories prop changes (parent navigation)
+  // Reset stack when input categories prop changes (parent navigation).
+  // `t` is intentionally excluded: useTranslation returns a fresh function each
+  // render, so including it would re-fire the effect on every render and reset
+  // the stack immediately after handleSelect pushes a child level — making
+  // parent-category clicks appear to do nothing.
+  // biome-ignore lint/correctness/useExhaustiveDependencies: t identity is unstable; key is static
   useEffect(() => {
     setStack([{ id: parentId ?? null, name: t("categories.root"), categories }]);
-  }, [categories, parentId, t]);
+  }, [categories, parentId]);
 
   const current = stack[stack.length - 1];
   const currentCategories = current.categories;