增加对CloudMail(SkyMail)邮箱的支持

background/steps/fetch-login-code.js

@@ -10,6 +10,7 @@
       addLog: rawAddLog = async () => {},
       chrome,
       CLOUDFLARE_TEMP_EMAIL_PROVIDER,
+      CLOUD_MAIL_PROVIDER = 'cloudmail',
       completeStepFromBackground,
       confirmCustomVerificationStepBypass,
       ensureMail2925MailboxSession,
@@ -484,6 +485,7 @@
         mail.provider === HOTMAIL_PROVIDER
         || mail.provider === LUCKMAIL_PROVIDER
         || mail.provider === CLOUDFLARE_TEMP_EMAIL_PROVIDER
+        || mail.provider === CLOUD_MAIL_PROVIDER
       ) {
         await addLog(`步骤 ${visibleStep}：正在通过 ${mail.label} 轮询验证码...`);
       } else {