fix(table): ensure defaultPageSize is used when pageSize not provided (#6101)

* fix(pagination): ensure default page size is used when pageSize is not provided

* fix(pagination): reset current page to 1 when total page count changes

* fix(pagination): remove redundant reset of current page when total page count changes

* chore: stash changelog [ci skip]

---------

Co-authored-by: tdesign-bot <tdesign@tencent.com>

Author: RSS1102

packages/components/pagination/pagination.tsx

@@ -140,13 +140,6 @@ export default defineComponent({
       return array;
     });
 
-    // 如果页面总数发生变化并当前页数大于总页数则重置为1
-    watch(
-      () => pageCount.value,
-      () => {
-        if (innerCurrent.value > pageCount.value) innerCurrent.value = 1;
-      },
-    );
     watch(
       () => innerCurrent.value,
       (val) => (jumpIndex.value = val),

packages/components/table/hooks/usePagination.tsx

@@ -37,7 +37,10 @@ export default function usePagination(
       if (!pagination.value || !pagination.value.current) return;
       const { current, pageSize } = pagination.value;
       innerPagination.value = { current, pageSize };
-      updateDataSourceAndPaginate(pagination.value.current, pagination.value.pageSize);
+      updateDataSourceAndPaginate(
+        pagination.value.current,
+        pagination.value.pageSize || pagination.value.defaultPageSize,
+      );
     },
     { immediate: true },
   );

packages/tdesign-vue-next/.changelog/pr-6101.md

@@ -0,0 +1,6 @@
+---
+pr_number: 6101
+contributor: RSS1102
+---
+
+- fix(table): 当未提供 `pageSize` 时确保使用 `defaultPageSize` 大小 @RSS1102 ([#6101](https://github.com/Tencent/tdesign-vue-next/pull/6101))