feat: 优化2925账号池表单，修复步骤7无法识别重试页面bug

tests/sidepanel-mail2925-edit.test.js

@@ -2,9 +2,11 @@ const test = require('node:test');
 const assert = require('node:assert/strict');
 const fs = require('node:fs');
 
-test('sidepanel html contains cancel edit button for mail2925 form', () => {
+test('sidepanel html contains collapsible mail2925 form controls', () => {
   const html = fs.readFileSync('sidepanel/sidepanel.html', 'utf8');
-  assert.match(html, /id="btn-cancel-mail2925-edit"/);
+  assert.match(html, /id="btn-toggle-mail2925-form"/);
+  assert.match(html, /id="mail2925-form-shell"/);
+  assert.doesNotMatch(html, /id="btn-cancel-mail2925-edit"/);
 });
 
 test('mail2925 manager renders edit action for existing accounts', () => {
@@ -43,14 +45,15 @@ test('mail2925 manager renders edit action for existing accounts', () => {
     },
     dom: {
       btnAddMail2925Account: { textContent: '', disabled: false, addEventListener() {} },
-      btnCancelMail2925Edit: { style: { display: 'none' }, addEventListener() {} },
       btnDeleteAllMail2925Accounts: { textContent: '', disabled: false, addEventListener() {} },
       btnImportMail2925Accounts: { disabled: false, addEventListener() {} },
+      btnToggleMail2925Form: { textContent: '', setAttribute() {}, addEventListener() {} },
       btnToggleMail2925List: { textContent: '', disabled: false, setAttribute() {}, addEventListener() {} },
       inputMail2925Email: { value: '' },
       inputMail2925Import: { value: '' },
       inputMail2925Password: { value: '' },
       mail2925AccountsList,
+      mail2925FormShell: { hidden: true },
       mail2925ListShell: { classList: { toggle() {} } },
     },
     helpers: {