feat(10-03): search, sort, filter, page and bulk-delete any list

- List state (search, sort, dir, page, per_page, filter[<name>]) lives in
  the URL query through parseListQuery/toListQuery; every change is a
  router replace and clears the selection; search is debounced 300 ms and
  resets the page
- DataTable renders the schema columns with a tri-state page checkbox,
  asc/desc/none sorting with aria-sort, selected rows, a sticky header,
  eight skeleton rows while loading and an empty slot
- CellValue renders text (muted dash when empty, arrays comma-joined),
  datetime as YYYY-MM-DD HH:mm and switch as the Tak/Nie pills
- The heading shows the plural recordCount and the create button;
  delete sits in the toolbar, disabled without a selection, and confirms
  with the plural deleteConfirm in a Reka alert dialog before POSTing
  bulk-delete; a 409 shows a danger toast
- FilterBar renders switch (JSON of the option value), daterange
  (from..to) and scope filters (choices from filters/{scope}/options)
- Pagination shows the range, the per-page select over perPageOptions
  (hidden with one choice) and a pager with ellipsis
- The tracer smoke test skips the new checkbox column; new backend::lang
  list keys; boardwalk/dist rebuilt

admin/tests/smoke/tracer.smoke.test.ts

@@ -189,8 +189,11 @@ describe('navigation shell and list', () => {
     }
 
     expect(wrapper.find('h1').text()).toBe('Widgets')
-    expect(wrapper.findAll('th').map((th) => th.text())).toEqual(['Name', 'Code', 'Tags'])
-    const rows = wrapper.findAll('tbody tr').map((tr) => tr.findAll('td').map((td) => td.text()))
+    // The checkbox column (data-select) is not a schema column.
+    expect(wrapper.findAll('th:not([data-select])').map((th) => th.text())).toEqual(['Name', 'Code', 'Tags', 'Created', 'Active'])
+    const rows = wrapper
+      .findAll('tbody tr')
+      .map((tr) => tr.findAll('td:not([data-select])').map((td) => td.text()).slice(0, 3))
     expect(rows).toEqual([
       ['Blue widget', 'W-01', 'small, round'],
       ['Green widget', 'W-02', '—'],