refactor(core): minimize diff with main in collection hooks

- remove unnecessary setPageSize wrapper in use-collection-variables
- restore cursor pagination tests removed by unrelated changes

Author: IzumiSy

packages/core/src/hooks/use-collection-variables.ts

@@ -152,7 +152,7 @@ export function useCollectionVariables(
     resetPage,
     goToFirstPage,
     goToLastPage,
-    setPageSize: setCursorPageSize,
+    setPageSize,
     getHasPrevPage,
     getHasNextPage,
     resetCount,
@@ -248,13 +248,6 @@ export function useCollectionVariables(
     resetPage();
   }, [resetPage]);
 
-  const setPageSize = useCallback(
-    (size: number) => {
-      setCursorPageSize(size);
-    },
-    [setCursorPageSize],
-  );
-
   // ---------------------------------------------------------------------------
   // Build collection variables (Tailor Platform format)
   // ---------------------------------------------------------------------------

packages/core/src/hooks/use-cursor-pagination.test.ts

@@ -12,6 +12,7 @@ describe("useCursorPagination", () => {
       expect(result.current.cursor).toBeNull();
       expect(result.current.cursorStack).toEqual([]);
       expect(result.current.paginationDirection).toBe("forward");
+      expect(result.current.pageSize).toBe(20);
     });
 
     it("returns correct initial paginationVariables", () => {
@@ -183,6 +184,24 @@ describe("useCursorPagination", () => {
     });
   });
 
+  // ---------------------------------------------------------------------------
+  // setPageSize
+  // ---------------------------------------------------------------------------
+  describe("setPageSize", () => {
+    it("changes page size and resets to first page", () => {
+      const { result } = renderHook(() => useCursorPagination(20));
+
+      act(() => result.current.goToNextPage({ endCursor: "c1" }));
+      act(() => result.current.setPageSize(50));
+
+      expect(result.current.pageSize).toBe(50);
+      expect(result.current.cursor).toBeNull();
+      expect(result.current.cursorStack).toEqual([]);
+      expect(result.current.paginationDirection).toBe("forward");
+      expect(result.current.paginationVariables).toEqual({ first: 50 });
+    });
+  });
+
   // ---------------------------------------------------------------------------
   // paginationVariables shape
   // ---------------------------------------------------------------------------
@@ -280,5 +299,11 @@ describe("useCursorPagination", () => {
       act(() => result.current.goToLastPage());
       expect(result.current.resetCount).toBe(0);
     });
+
+    it("does not increment on setPageSize", () => {
+      const { result } = renderHook(() => useCursorPagination(20));
+      act(() => result.current.setPageSize(50));
+      expect(result.current.resetCount).toBe(0);
+    });
   });
 });