Replace printed/unprinted tabs with unified list and inline filters

- All checks shown in one table by default (load all, no server-side printed filter)
- Add payee search, date-from/to, and status filter controls to toolbar
- Filtering is client-side; no extra API calls on filter changes
- All checks get Edit/Delete buttons regardless of printed status
- All checks get checkboxes for PDF selection
- Remove separate Reprint button and reprintCheck function
- Remove printed guard from PUT and DELETE endpoints

src/routes/checks.js

@@ -86,10 +86,6 @@ router.put('/:id', (req, res) => {
   const check = db.prepare('SELECT * FROM checks WHERE id = ?').get(req.params.id);
   if (!check) return res.status(404).json({ error: 'Check not found' });
 
-  if (check.printed) {
-    return res.status(409).json({ error: 'Cannot edit a check that has been printed.' });
-  }
-
   const { payee, amount, check_date, memo, note1, note2,
           payee_address1, payee_address2, payee_address3, payee_address4 } = req.body;
 
@@ -120,10 +116,6 @@ router.delete('/:id', (req, res) => {
   const check = db.prepare('SELECT * FROM checks WHERE id = ?').get(req.params.id);
   if (!check) return res.status(404).json({ error: 'Check not found' });
 
-  if (check.printed) {
-    return res.status(409).json({ error: 'Cannot delete a check that has been printed.' });
-  }
-
   db.prepare('DELETE FROM checks WHERE id = ?').run(req.params.id);
   res.status(204).send();
 });