修复自定义邮箱收码模式默认手动

tests/sidepanel-custom-email-pool.test.js

@@ -60,6 +60,10 @@ test('sidepanel html exposes custom email pool generator option and input row',
   assert.match(html, /id="input-custom-email-pool-import"/);
   assert.match(html, /id="custom-email-pool-list"/);
   assert.match(html, /id="btn-custom-email-pool-bulk-used"/);
+  assert.match(html, /id="row-custom-mail-receive-mode"/);
+  assert.match(html, /id="select-custom-mail-receive-mode"/);
+  assert.match(html, /id="row-custom-mail-helper-base-url"/);
+  assert.match(html, /id="input-custom-mail-helper-base-url"/);
   assert.match(html, /id="row-custom-mail-provider-pool"/);
   assert.match(html, /id="input-custom-mail-provider-pool"/);
 });
@@ -187,6 +191,19 @@ test('sidepanel queues custom email pool refresh when the pool row is visible',
   );
 });
 
+test('sidepanel only shows custom mail helper url when helper receive mode is selected', () => {
+  const source = extractFunction('updateMailProviderUI');
+
+  assert.match(
+    source,
+    /rowCustomMailReceiveMode\.style\.display = useCustomEmail \? '' : 'none'/
+  );
+  assert.match(
+    source,
+    /rowCustomMailHelperBaseUrl\.style\.display = useCustomEmail && getSelectedCustomMailReceiveMode\(\) === CUSTOM_MAIL_RECEIVE_MODE_HELPER \? '' : 'none'/
+  );
+});
+
 test('sidepanel custom verification dialog exposes add-phone action for step 8', async () => {
   const bundle = [
     extractFunction('getCustomVerificationPromptCopy'),