refactor(mail): 精简邮件通知与元信息展示

- 点击新邮件提示可直接打开首封新邮件，并兼容键盘回车与空格操作。
- 移除邮件详情中的认证结果展示及相关类型定义，简化消息元信息结构。

apps/web/src/lib/api-types.ts

@@ -59,11 +59,9 @@ export type Alias = { id: string; domainId: string; source: string; destination:
 export type MailFolder = { id: string; name: string; role: string; unreadCount: number; totalCount: number; uidValidity: number; uidNext: number; highestModseq: number }
 export type Attachment = { id: string; messageId: string; filename: string; contentType: string; sizeBytes: number; createdAt: string }
 export type MailLabel = { id: string; mailboxId?: string; name: string; color: string; messageCount?: number }
-export type MailAuthentication = { authenticationResults: string; receivedSpf: string; spf: string; dkim: string; dmarc: string }
 export type MailMessage = {
   id: string; mailboxId?: string; mailboxAddress?: string; ownerEmail?: string; recipientAddress?: string; folderId: string; folder: string; messageUid: string; imapUid: number; imapModseq: number; messageId: string; subject: string; from: string; fromName?: string; to: string[]; cc: string[]; bcc?: string[]; sentAt: string; receivedAt: string; snippet: string; bodyText?: string; bodyHtml?: string; isRead: boolean; isStarred: boolean; hasAttachments: boolean; sizeBytes: number; attachments?: Attachment[]
   labels?: MailLabel[]
-  authentication?: MailAuthentication
 }
 export type DNSRecord = { type: string; name: string; value: string; ttl: number }
 export type DNSCheckResult = { domain: string; status: string; checks: Record<string, { ok: boolean; message: string; found?: string[] }> }