🐛 fix(data-grid): 允许未知总数结果跳页

- 未知总数分页保留跳页控件
- 跳页输入不再被当前估算页数截断

Fixes #584

frontend/src/components/DataGrid.layout.test.tsx

@@ -1934,7 +1934,7 @@ describe('DataGrid layout', () => {
     expect(emptyPreviewMarkup).not.toContain('data_grid.preview_panel');
   });
 
-  it('keeps unknown-total pagination in sequential mode instead of pretending total pages are known', () => {
+  it('keeps unknown-total pagination sequential while still allowing direct page jumps', () => {
     const markup = renderDataGridWithI18n(
       <DataGrid
         data={[
@@ -1962,10 +1962,11 @@ describe('DataGrid layout', () => {
 
     expect(markup).toContain('第 3 页');
     expect(markup).not.toContain('<strong>3</strong><span>/</span><span>4</span>');
-    expect(markup).not.toContain('data-grid-pagination-jump="true"');
+    expect(markup).toContain('data-grid-pagination-jump="true"');
+    expect(markup).toContain('跳页');
   });
 
-  it('keeps legacy unknown-total pagination in sequential mode instead of numbered pages', () => {
+  it('keeps legacy unknown-total pagination sequential while still allowing direct page jumps', () => {
     const previousUiVersion = mockStoreState.uiVersion;
     mockStoreState.uiVersion = 'legacy';
 
@@ -1998,7 +1999,8 @@ describe('DataGrid layout', () => {
       expect(markup).toContain('第 3 页');
       expect(markup).toContain('data-grid-pagination-sequential="true"');
       expect(markup).not.toContain('class="ant-pagination');
-      expect(markup).not.toContain('data-grid-pagination-jump="true"');
+      expect(markup).toContain('data-grid-pagination-jump="true"');
+      expect(markup).toContain('跳页');
     } finally {
       mockStoreState.uiVersion = previousUiVersion;
     }
@@ -2557,8 +2559,8 @@ describe('DataGrid layout', () => {
     expect(css).toContain('overflow-x: auto;');
     expect(paginationBarSource).toContain("label: translate('data_grid.pagination.page_size_option', { count: value })");
     expect(paginationBarSource).not.toContain("label: `${value}/页`");
-    expect(paginationBarSource).toContain('const maxJumpPage = Math.max(1, paginationTotalPages);');
+    expect(paginationBarSource).toContain('const maxJumpPage = showKnownPageCount ? Math.max(1, paginationTotalPages) : null;');
-    expect(paginationBarSource).toContain('Math.min(maxJumpPage, Math.max(1, Math.trunc(Number(jumpPage))))');
+    expect(paginationBarSource).toContain('max={maxJumpPage ?? undefined}');
     expect(paginationBarSource).toContain('onPressEnter={submitJumpPage}');
     expect(paginationBarSource).toContain('data-grid-pagination-jump="true"');
     expect(css).toContain('.data-grid-pagination-jump-input.ant-input-number-focused');

frontend/src/components/DataGridPaginationBar.tsx

@@ -58,9 +58,11 @@ const DataGridPaginationBar: React.FC<DataGridPaginationBarProps> = ({
     return null;
   }
 
-  const maxJumpPage = Math.max(1, paginationTotalPages);
+  const maxJumpPage = showKnownPageCount ? Math.max(1, paginationTotalPages) : null;
   const normalizedJumpPage = Number.isFinite(Number(jumpPage)) && Number(jumpPage) > 0
-    ? Math.min(maxJumpPage, Math.max(1, Math.trunc(Number(jumpPage))))
+    ? (maxJumpPage !== null
+      ? Math.min(maxJumpPage, Math.max(1, Math.trunc(Number(jumpPage))))
+      : Math.max(1, Math.trunc(Number(jumpPage))))
     : null;
   const jumpDisabled = !onPageChange || normalizedJumpPage === null || normalizedJumpPage === pagination.current;
   const submitJumpPage = () => {
@@ -68,13 +70,13 @@ const DataGridPaginationBar: React.FC<DataGridPaginationBarProps> = ({
     if (normalizedJumpPage === pagination.current) return;
     onPageChange(normalizedJumpPage, pagination.pageSize);
   };
-  const jumpPageControl = showKnownPageCount ? (
+  const jumpPageControl = (
     <div className="data-grid-pagination-jump" data-grid-pagination-jump="true">
       <span className="data-grid-pagination-jump-label">{translate('data_grid.pagination.jump_label')}</span>
       <InputNumber
         size="small"
         min={1}
-        max={maxJumpPage}
+        max={maxJumpPage ?? undefined}
         precision={0}
         controls={false}
         value={jumpPage}
@@ -93,7 +95,7 @@ const DataGridPaginationBar: React.FC<DataGridPaginationBarProps> = ({
         {translate('data_grid.pagination.jump_action')}
       </Button>
     </div>
-  ) : null;
+  );
   const sequentialPaginationControl = (
     <div
       className="data-grid-pagination-sequential"