fix(email): set sender before PHPMailer init

tests/widget-system/email-system-contract.test.cjs

@@ -47,7 +47,14 @@ test('email templates and SMTP use one aksrt_settings schema', () => {
 })
 
 test('SMTP authentication and failures use the canonical mail service', () => {
+  assert.match(coreHooks, /add_filter\('wp_mail_from',/)
+  assert.match(coreHooks, /add_filter\('wp_mail_from_name',/)
+  assert.match(coreHooks, /if \(empty\(\$mail\['enabled'\]\)\) return \$from/)
+  assert.match(coreHooks, /if \(empty\(\$mail\['enabled'\]\)\) return \$from_name/)
+  assert.match(coreHooks, /\$mail\['from_address'\]/)
+  assert.match(coreHooks, /\$mail\['from_name'\]/)
   assert.match(coreHooks, /\$phpmailer->SMTPAuth\s*=\s*!empty\(\$mail\['auth'\]\)\s*&&\s*!empty\(\$mail\['username'\]\)/)
+  assert.doesNotMatch(coreHooks, /\$phpmailer->setFrom\(/)
   assert.match(mail, /add_action\('wp_mail_failed',\s*\$capture_failure\)/)
   assert.match(mail, /remove_action\('wp_mail_failed',\s*\$capture_failure\)/)
   assert.match(mail, /error_log\('\[AKSRT\] SMTP 测试失败：'/)