feat: 增强2925邮箱处理逻辑，添加邮件预清空机制，更新相关测试用例

tests/mail-2925-content.test.js

@@ -431,12 +431,17 @@ test('deleteAllMailboxEmails selects all messages and clicks delete', async () =
 const calls = [];
 const selectAllControl = { kind: 'select-all' };
 const deleteButton = { kind: 'delete' };
+let mailboxCleared = false;
 
 async function returnToInbox() {
   calls.push('inbox');
   return true;
 }
 
+function findMailItems() {
+  return mailboxCleared ? [] : [{ id: 'mail-1' }];
+}
+
 function findSelectAllControl() {
   return selectAllControl;
 }
@@ -456,11 +461,13 @@ function simulateClick(node) {
   }
   if (node === deleteButton) {
     calls.push('delete');
+    mailboxCleared = true;
     return;
   }
   throw new Error('unexpected node');
 }
 
+async function sleep() {}
 async function sleepRandom() {}
 
 const console = { warn() {} };

tests/verification-flow-polling.test.js

@@ -111,7 +111,7 @@ test('verification flow runs beforeSubmit hook before filling the code', async (
   ]);
 });
 
-test('verification flow triggers 2925 mailbox cleanup only after code submission succeeds', async () => {
+test('verification flow clears 2925 mailbox before polling and after successful login code submission', async () => {
   const mailMessages = [];
 
   const helpers = api.createVerificationFlowHelpers({
@@ -169,7 +169,73 @@ test('verification flow triggers 2925 mailbox cleanup only after code submission
 
   await new Promise((resolve) => setTimeout(resolve, 0));
 
-  assert.deepStrictEqual(mailMessages, ['POLL_EMAIL', 'DELETE_ALL_EMAILS']);
+  assert.deepStrictEqual(mailMessages, ['DELETE_ALL_EMAILS', 'POLL_EMAIL', 'DELETE_ALL_EMAILS']);
+});
+
+test('verification flow clears 2925 mailbox before polling and after successful signup code submission', async () => {
+  const mailMessages = [];
+
+  const helpers = api.createVerificationFlowHelpers({
+    addLog: async () => {},
+    chrome: {
+      tabs: {
+        update: async () => {},
+      },
+    },
+    CLOUDFLARE_TEMP_EMAIL_PROVIDER: 'cloudflare-temp-email',
+    completeStepFromBackground: async () => {},
+    confirmCustomVerificationStepBypassRequest: async () => ({ confirmed: true }),
+    getHotmailVerificationPollConfig: () => ({}),
+    getHotmailVerificationRequestTimestamp: () => 0,
+    getState: async () => ({}),
+    getTabId: async () => 1,
+    HOTMAIL_PROVIDER: 'hotmail-api',
+    isStopError: () => false,
+    LUCKMAIL_PROVIDER: 'luckmail-api',
+    MAIL_2925_VERIFICATION_INTERVAL_MS: 15000,
+    MAIL_2925_VERIFICATION_MAX_ATTEMPTS: 15,
+    pollCloudflareTempEmailVerificationCode: async () => ({}),
+    pollHotmailVerificationCode: async () => ({}),
+    pollLuckmailVerificationCode: async () => ({}),
+    sendToContentScript: async (_source, message) => {
+      if (message.type === 'FILL_CODE') {
+        return {};
+      }
+      if (message.type === 'RESEND_VERIFICATION_CODE') {
+        return {};
+      }
+      return {};
+    },
+    sendToMailContentScriptResilient: async (_mail, message) => {
+      mailMessages.push(message.type);
+      if (message.type === 'POLL_EMAIL') {
+        return { code: '654321', emailTimestamp: 123 };
+      }
+      return { ok: true, deleted: true };
+    },
+    setState: async () => {},
+    setStepStatus: async () => {},
+    sleepWithStop: async () => {},
+    throwIfStopped: () => {},
+    VERIFICATION_POLL_MAX_ROUNDS: 5,
+  });
+
+  await helpers.resolveVerificationStep(
+    4,
+    {
+      email: 'user@example.com',
+      mailProvider: '2925',
+      lastSignupCode: null,
+    },
+    { provider: '2925', label: '2925 邮箱' },
+    {
+      requestFreshCodeFirst: false,
+    }
+  );
+
+  await new Promise((resolve) => setTimeout(resolve, 0));
+
+  assert.deepStrictEqual(mailMessages, ['DELETE_ALL_EMAILS', 'POLL_EMAIL', 'DELETE_ALL_EMAILS']);
 });
 
 test('verification flow treats add-phone after login code submit as fatal instead of completing step 8', async () => {