release: prepare v1.2.41

.github/release-notes/v1.2.28.md

@@ -0,0 +1,8 @@
+- 收信规则页新增规则名称搜索，支持按字母或完整名称快速筛选，并提供清空搜索和空结果提示。
+- 优化规则列表的桌面端与手机端布局，规则名称、适用邮箱、条件和动作可完整换行显示，操作按钮不再挤压内容。
+- 调整新建规则工具栏与表单对齐，搜索框与规则列表等宽，“所有条件”选择器与下方条件字段保持同一左边界。
+- 邮箱侧栏的“文件夹”和“标签”支持点击展开或收起，桌面端和手机侧栏保持一致交互。
+- 降低所有对话框的背景遮罩深度，手机端和桌面端分别使用更轻的灰色层级，避免打开弹窗后页面过黑。
+- 重排“被拦截邮件”页面，统一标题、统计和新增入口，长邮箱地址与拦截原因会自动换行，不再超出边框。
+- 重排“邮件清理”页面的统计卡片和清理操作，修复窄屏文字截断、按钮挤压和横向溢出。
+- 统一前后台文字按钮样式，移除“新建规则”、“新增拦截”、权限配置、账号、域名、邮箱和转发等命令前多余的加号图标。

.github/release-notes/v1.2.29.md

@@ -0,0 +1,13 @@
+- 重构后台账号管理：新增账号统一使用“邮箱前缀 + 已有域名”创建，支持显示名称、密码二次确认、邮箱数量上限、共享存储容量和权限配置。
+- 创建用户账号时自动生成同地址默认邮箱；账号与全部绑定邮箱共用登录密码，账号重置密码后会同步更新所属邮箱。
+- 存储容量改为账号级共享：管理员默认 1 GB，普通用户默认 100 MB，最低可设置 100 MB；新增邮箱不再重复增加容量，容量检查会统计账号下全部邮箱。
+- 在账号编辑中集中管理共享存储容量，并在账号列表显示邮箱数量、共享容量、邮箱搜索与复制入口；移除邮箱地址前多余图标和重复身份标签。
+- 重做邮箱管理页面：按归属账号聚合子邮箱，支持账号或邮箱搜索、展开收起、邮箱数量统计及按地址排序，邮箱较多时仍可快速定位。
+- 默认邮箱与所属账号绑定并受到保护，管理员账号、用户默认邮箱和管理员账号下的默认邮箱均不能删除；默认邮箱也不能单独改归属或停用。
+- 普通子邮箱支持在三点菜单中启用、停用和删除；启用状态使用绿色高亮，停用状态使用红色提示，删除前必须二次确认。
+- 后台与 Open API 创建或改绑邮箱时统一继承所属账号密码和共享容量，修复遗漏容量参数时意外清零及接口绕过默认邮箱保护的问题。
+- 优化权限配置：管理员权限固定只读，普通用户系统权限和使用限制可以编辑，同时保留系统名称与说明，避免系统身份被误改。
+- 每个权限配置均提供“查看全部权限”入口，按分类展示完整权限清单，已开启项目显示勾选，未开启项目保持空框。
+- 统一后台九个功能页的卡片、表格、侧栏选中态、状态文字、操作菜单和空状态，减少重复标签、图标与视觉噪音。
+- 完善桌面端和手机端响应式布局，账号、邮箱和权限页面在窄屏下保持可读、可操作且无横向溢出。
+- 补充账号默认邮箱、管理员保护、共享容量、密码继承、Open API 兼容和权限编辑等回归测试。

.github/release-notes/v1.2.30.md

@@ -0,0 +1,9 @@
+- 修复邮箱侧栏切换目录后，紧凑列表顶部仍可能显示上一个目录名称的问题；收件箱、草稿箱、已发送、已归档、已删除、星标邮件、垃圾邮件、自定义文件夹和标签现在会与当前列表保持一致。
+- 切换邮箱目录时按当前视图重新生成列表区域，避免星标邮件等旧标题或旧操作状态残留到其他目录。
+- 修复“已删除”目录批量删除仍执行“移入已删除”的问题；现在会永久删除所选邮件，并在操作前显示不可恢复的二次确认。
+- 区分普通目录与“已删除”的删除语义：普通目录显示“移入已删除”，已删除目录显示“永久删除”。
+- 统一批量工具栏、邮件详情、右键菜单和列表快捷按钮的删除名称、确认文案与完成提示，避免显示“已移动”但实际执行删除等文字不一致。
+- 优化批量归档、移回收件箱、移入垃圾邮件和移入已删除后的提示，准确显示目标目录及处理数量。
+- 后台邮箱管理中将账号默认邮箱固定置顶，其余子邮箱继续按 A-Z / 0-9 排序，方便快速识别账号主邮箱。
+- 修正邮箱管理表头与账号行的网格结构，“权限管理”和“子邮箱”列标题及内容统一居中对齐。
+- 保留默认邮箱不可停用、不可删除保护；普通子邮箱继续支持启用、停用和二次确认删除。

.github/release-notes/v1.2.31.md

@@ -0,0 +1,7 @@
+- 邮件正文新增“自动翻译”开关并默认开启；打开邮件时仅在检测到正文语言与当前界面语言明显不同时自动翻译，避免中文邮件产生无意义请求。
+- 自动翻译开关会保存在当前浏览器中，关闭后继续显示原文，下次访问仍沿用用户选择。
+- 缓存同一封邮件、同一目标语言的翻译结果；返回列表后再次打开邮件可直接显示译文，减少重复等待和翻译请求。
+- 保留“显示原文”“显示译文”和“重新翻译”操作；重新翻译会主动刷新缓存中的译文。
+- 优化服务端翻译流程，纯文本正文与 HTML 正文改为并行处理，HTML 文本节点使用受控并发翻译，复杂排版邮件的翻译速度更快。
+- 翻译后的邮件继续保留原有 HTML 结构、图片和样式，并跳过代码、预格式文本、脚本及样式内容。
+- 增加 HTML 翻译测试和并发检测，确保排版结构不被破坏且没有数据竞争。

.github/release-notes/v1.2.32.md

@@ -0,0 +1,11 @@
+- 后台新增“备份与恢复”，可创建、校验、下载、删除完整加密备份；备份包含账号、邮件、附件、Maildir、DKIM、证书和部署配置。
+- 备份使用 AES-256-CBC、PBKDF2 和 SHA-256 校验；支持自行输入或生成 24 位恢复密码，并提供显示、复制和本地密码文件下载。
+- 新增 3、5、7、30 天及自定义周期的定时备份，可独立选择本地保留、Telegram 推送和 Google 云端硬盘。
+- Telegram 备份复用系统已绑定机器人，可沿用邮件通知接收方，也可自动查询多个群组并选择独立备份群组；邮件通知与备份推送互不干扰。
+- 新增 Google 云端硬盘 OAuth 配置、加密令牌保存、专用备份目录、手动上传和定时上传。
+- 安装脚本新增未安装状态管理菜单和“备份恢复”，自动扫描 `/root/` 下的多份备份并按时间排序，支持输入序号恢复。
+- 恢复流程增加压缩包路径、符号链接、特殊文件和 SQLite 完整性校验；失败时清理不完整安装并保留原始加密备份。
+- 优化备份页面的桌面与手机布局、状态对齐、配置弹窗和本地备份列表；修复未配置 Telegram 时本地备份被误报推送失败的问题。
+- 修复后台邮箱管理中失联归属账号可能产生重复列表标识的问题，并将同一归属账号的邮箱重新聚合显示。
+
+**完整更新日志**：[v1.2.31...v1.2.32](https://github.com/zxyszx/NewSzxcn-Email/compare/v1.2.31...v1.2.32)

.github/release-notes/v1.2.33.md

@@ -0,0 +1,9 @@
+- 修复 `v1.2.32` 在线更新只替换镜像、未同步宿主机 Compose 文件时，“创建备份”按钮持续灰色的问题。
+- 完整备份组件改为随 API 和一体化镜像提供；旧服务器升级后可直接使用现有 `/data` 持久化目录创建备份，无需手动修改部署文件。
+- 备份会根据当前容器运行配置生成可恢复的 `.env`，并过滤只适用于旧容器内部的更新和备份路径变量。
+- 服务器 IP 改为根据邮局主机名的公网 DNS 自动检测，移除私人 IP 示例和手动填写项，支持一键重新检测。
+- Telegram 备份报告实时使用自动检测到的服务器 IP；检测失败时明确显示“未检测到”，不保存或暴露固定地址。
+- Google Cloud OAuth 回调地址改为单行只读输入框并增加复制按钮，修复长地址断行影响查看和复制的问题。
+- 优化备份组件缺失提示，并完成桌面、手机页面溢出检查以及备份、恢复、安装、回滚和 DKIM 回归测试。
+
+**完整更新日志**：[v1.2.32...v1.2.33](https://github.com/zxyszx/NewSzxcn-Email/compare/v1.2.32...v1.2.33)

.github/release-notes/v1.2.34.md

@@ -0,0 +1,9 @@
+- 手动备份与定时备份统一使用同一个恢复密码，避免每次创建备份时再次输入不同密码造成混淆。
+- 已保存备份密码时，点击“创建备份”不再显示第二套密码输入框，直接使用系统安全保存的密码。
+- 首次创建备份且尚未设置密码时，仍要求输入并二次确认；首次密码会保存为后续手动与定时备份的统一恢复密码。
+- 定时备份页面精简为“恢复密码”摘要，仅显示首尾字符掩码，例如 `A••••••••9`；设置或更换密码时使用独立弹窗，不再挤占主页面。
+- 密码更新使用独立接口，不会连带修改尚未保存的备份周期、Telegram 或 Google 云端硬盘设置。
+- 页面只接收密码首尾掩码，不会返回完整恢复密码；更换密码时仍必须重新输入并确认。
+- 增加统一密码、密码掩码、已保存密码手动备份及首次并发创建的后端保护与回归测试。
+
+**完整更新日志**：[v1.2.33...v1.2.34](https://github.com/zxyszx/NewSzxcn-Email/compare/v1.2.33...v1.2.34)

.github/release-notes/v1.2.35.md

@@ -0,0 +1,7 @@
+- 修复完整备份上传 Google 云端硬盘失败：由小文件上传改为官方可恢复分块上传，支持大型邮箱备份。
+- 同一份本地加密备份只显示一次文件名，下方分别显示 Telegram 与 Google 云端硬盘的上传百分比、已上传大小和结果。
+- 手动发送改为后台任务，刷新或离开页面后上传仍会继续，返回备份页可继续查看进度。
+- Google 授权失效、空间不足、请求限流、Drive API 未启用及网络超时会显示对应中文处理建议。
+- 定时备份的云端推送失败也会直接显示具体原因，不再只提示查看服务器日志。
+
+**完整更新日志**：[v1.2.34...v1.2.35](https://github.com/zxyszx/NewSzxcn-Email/compare/v1.2.34...v1.2.35)

.github/release-notes/v1.2.36.md

@@ -0,0 +1,11 @@
+- Google 云端硬盘配置弹窗增加 Google Drive API 启用说明和官方控制台直达入口。
+- 明确提示必须在 OAuth 客户端所属的同一 Google Cloud 项目中启用 Drive API。
+- 补充启用 API 后重新连接 Google 账号的操作顺序，减少授权成功但无法上传的配置误区。
+- 写信与编辑草稿弹窗改为更紧凑的居中布局，重新整理字段、工具栏和发送操作区，完整保留附件、格式、签名、日程、预览和定时发送能力。
+- 修复超长授权码、链接和代码内容撑宽编辑器的问题，桌面端与手机端均会在正文范围内安全换行。
+- 启用浏览器原生拼写检查，并统一普通发送与定时发送的收件人校验。
+- 关闭写信窗口时立即保存最新正文与附件，保存失败会保留窗口并提示，避免等待自动保存期间丢失草稿。
+- 写信格式栏增加正文与标题 1/2/3 段落样式、实时字数统计和“更多格式”菜单，将完整格式能力稳定收纳在两行内。
+- 提高邮箱与管理后台次级文字的对比度，改善浅色与深色模式下的阅读清晰度。
+
+**完整更新日志**：[v1.2.35...v1.2.36](https://github.com/zxyszx/NewSzxcn-Email/compare/v1.2.35...v1.2.36)

.github/release-notes/v1.2.37.md

@@ -0,0 +1,4 @@
+- 写信页发送区改为 Gmail 风格拆分按钮，主按钮直接发送，右侧下拉菜单提供“定时发送”。
+- 移除容易被误认为日期选择器的独立日历方块，保留原有定时预设和自定义发送时间功能。
+
+**完整更新日志**：[v1.2.36...v1.2.37](https://github.com/zxyszx/NewSzxcn-Email/compare/v1.2.36...v1.2.37)

.github/release-notes/v1.2.38.md

@@ -0,0 +1,6 @@
+- 写信发送拆分按钮统一使用 Gmail 风格蓝色主操作，浅色与暗色模式都保持清晰白字及一致悬停状态。
+- 修复“定时发送”菜单按左侧展开导致右边框越过写信窗口的问题，菜单改为右对齐并增加边缘避让和垂直间距。
+- 将默认主操作按钮从通用强调色中拆分，暗色主题下后台、个人设置、规则、弹窗确认、登录注册等页面统一使用深灰底白字；勾选框、进度条、选中态等仍保留清晰的强调色。
+- 已保存的浅色或暗色主题现在会在应用启动时统一恢复，切换到后台、登录及其他页面后不再丢失主题状态。
+
+**完整更新日志**：[v1.2.37...v1.2.38](https://github.com/zxyszx/NewSzxcn-Email/compare/v1.2.37...v1.2.38)

.github/release-notes/v1.2.39.md

@@ -0,0 +1,4 @@
+- 修复桌面端文件夹或标签较多时侧栏被内容撑出视口、底部项目无法访问的问题；账号、邮箱切换和写信入口保持固定，邮件导航区域独立滚动。
+- 同步包含 v1.2.38 的暗色主按钮与 Gmail 蓝色发送按钮修复，更新完成后写信发送按钮在浅色和暗色模式下均为蓝底白字。
+
+**完整更新日志**：[v1.2.38...v1.2.39](https://github.com/zxyszx/NewSzxcn-Email/compare/v1.2.38...v1.2.39)

.github/release-notes/v1.2.40.md

@@ -0,0 +1,6 @@
+- 修复桌面端文件夹或标签较多时侧栏被内容撑出视口、底部项目无法访问的问题；账号、邮箱切换和写信入口保持固定，邮件导航区域独立滚动。
+- 写信发送按钮在浅色和暗色模式下统一为 Gmail 风格蓝底白字，定时发送菜单在桌面和手机端均不会越过写信窗口。
+- 暗色主题默认主操作按钮改为深灰底白字，并与勾选框、进度条、危险按钮等语义颜色分离；进入后台或登录页后也会保持已选择的主题。
+- 修复备份后台任务测试结束过早导致发布流程偶发失败的问题。
+
+**完整更新日志**：[v1.2.39...v1.2.40](https://github.com/zxyszx/NewSzxcn-Email/compare/v1.2.39...v1.2.40)

.github/release-notes/v1.2.41.md

@@ -0,0 +1,3 @@
+- 调整写信页定时发送菜单宽度，使其与“发送 + 下拉箭头”组合按钮左右边缘完全对齐，同时保留桌面和手机端边界避让。
+
+**完整更新日志**：[v1.2.40...v1.2.41](https://github.com/zxyszx/NewSzxcn-Email/compare/v1.2.40...v1.2.41)

README.zh-CN.md

@@ -48,6 +48,8 @@ bash <(curl -fsSL https://raw.githubusercontent.com/zxyszx/NewSzxcn-Email/main/i
 
 ## 更新与回滚
 
+完整加密备份、Telegram 推送和新服务器恢复流程见 [备份与灾难恢复](docs/BACKUP_RESTORE.md)。
+
 ### 后台页面更新
 
 超级管理员可点击后台侧栏中的版本号，查看当前版本、最新版本与更新日志。点击“立即更新”后，系统会先在线备份 SQLite 数据库，再拉取新镜像并重启；页面会等待服务恢复后自动刷新。

VERSION

@@ -1 +1 @@
-1.2.27
+1.2.41

apps/api/internal/app/admin_handlers.go

@@ -49,9 +49,9 @@ func (a *App) handleAdminOverview(w http.ResponseWriter, r *http.Request) {
 }
 
 func (a *App) handleListUsers(w http.ResponseWriter, r *http.Request) {
-	rows, err := a.db.QueryContext(r.Context(), `SELECT u.id,u.login_name,u.email,u.display_name,u.role,u.disabled,u.two_factor_enabled,u.mailbox_limit_override,u.created_at,COUNT(mb.id),COALESCE(GROUP_CONCAT(mb.address), '')
+	rows, err := a.db.QueryContext(r.Context(), `SELECT u.id,u.login_name,u.email,u.display_name,u.role,u.disabled,u.two_factor_enabled,u.mailbox_limit_override,u.storage_quota_mb,u.created_at,COUNT(mb.id),COALESCE(GROUP_CONCAT(mb.address), '')
 		FROM users u LEFT JOIN mailboxes mb ON mb.user_id=u.id
-		GROUP BY u.id,u.login_name,u.email,u.display_name,u.role,u.disabled,u.two_factor_enabled,u.mailbox_limit_override,u.created_at
+		GROUP BY u.id,u.login_name,u.email,u.display_name,u.role,u.disabled,u.two_factor_enabled,u.mailbox_limit_override,u.storage_quota_mb,u.created_at
 		ORDER BY CASE WHEN u.role='admin' THEN 0 ELSE 1 END, lower(COALESCE(NULLIF(u.email,''),u.login_name)), lower(u.display_name), u.created_at`)
 	if err != nil {
 		respondError(w, http.StatusInternalServerError, "failed to list users")
@@ -64,7 +64,7 @@ func (a *App) handleListUsers(w http.ResponseWriter, r *http.Request) {
 		var disabled, twoFactorEnabled int
 		var mailboxLimitOverride sql.NullInt64
 		var created, mailboxCSV string
-		if err := rows.Scan(&item.ID, &item.LoginName, &item.Email, &item.DisplayName, &item.Role, &disabled, &twoFactorEnabled, &mailboxLimitOverride, &created, &item.MailboxCount, &mailboxCSV); err != nil {
+		if err := rows.Scan(&item.ID, &item.LoginName, &item.Email, &item.DisplayName, &item.Role, &disabled, &twoFactorEnabled, &mailboxLimitOverride, &item.StorageQuotaMB, &created, &item.MailboxCount, &mailboxCSV); err != nil {
 			respondError(w, http.StatusInternalServerError, "failed to scan users")
 			return
 		}
@@ -101,6 +101,7 @@ func (a *App) handleCreateUser(w http.ResponseWriter, r *http.Request) {
 		Password             string   `json:"password"`
 		Disabled             bool     `json:"disabled"`
 		MailboxLimitOverride *int     `json:"mailboxLimitOverride"`
+		StorageQuotaMB       int      `json:"storageQuotaMb"`
 		PermissionGroupIDs   []string `json:"permissionGroupIds"`
 	}
 	if err := decodeJSON(r, &req); err != nil {
@@ -142,6 +143,14 @@ func (a *App) handleCreateUser(w http.ResponseWriter, r *http.Request) {
 	if role == "admin" {
 		mailboxLimitOverride = nil
 	}
+	storageQuotaMB := req.StorageQuotaMB
+	if storageQuotaMB > 0 && storageQuotaMB < minimumStorageQuotaMB {
+		badRequest(w, errors.New("共享存储容量不能小于 100 MB"))
+		return
+	}
+	if storageQuotaMB == 0 {
+		storageQuotaMB = defaultUserStorageQuotaMB
+	}
 	if !hasMinimumPasswordLength(req.Password) {
 		badRequest(w, errors.New("password must be at least 6 characters"))
 		return
@@ -159,11 +168,22 @@ func (a *App) handleCreateUser(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	defer tx.Rollback()
-	if _, err = tx.ExecContext(r.Context(), `INSERT INTO users(id,login_name,email,display_name,role,password_hash,disabled,mailbox_limit_override,created_at,updated_at)
-		VALUES(?,?,?,?,?,?,?,?,?,?)`, id, primaryEmail, primaryEmail, displayName, role, string(passwordHash), boolInt(req.Disabled), nullableInt(mailboxLimitOverride), now, now); err != nil {
+	if _, err = tx.ExecContext(r.Context(), `INSERT INTO users(id,login_name,email,display_name,role,password_hash,disabled,mailbox_limit_override,storage_quota_mb,created_at,updated_at)
+		VALUES(?,?,?,?,?,?,?,?,?,?,?)`, id, primaryEmail, primaryEmail, displayName, role, string(passwordHash), boolInt(req.Disabled), nullableInt(mailboxLimitOverride), storageQuotaMB, now, now); err != nil {
 		badRequest(w, err)
 		return
 	}
+	localPart, domainName, _ := strings.Cut(primaryEmail, "@")
+	var primaryDomainID string
+	if err := tx.QueryRowContext(r.Context(), `SELECT id FROM domains WHERE lower(name)=lower(?)`, domainName).Scan(&primaryDomainID); err == nil {
+		if _, err := a.createMailboxWithPasswordHashTx(r.Context(), tx, id, primaryDomainID, localPart, displayName, string(passwordHash), storageQuotaMB, "active"); err != nil {
+			badRequest(w, err)
+			return
+		}
+	} else if !errors.Is(err, sql.ErrNoRows) {
+		respondError(w, http.StatusInternalServerError, "failed to load account domain")
+		return
+	}
 	permissionGroupIDs := req.PermissionGroupIDs
 	if role == "admin" {
 		permissionGroupIDs = nil
@@ -194,6 +214,7 @@ func (a *App) handleUpdateUser(w http.ResponseWriter, r *http.Request) {
 		Role                 string    `json:"role"`
 		Disabled             *bool     `json:"disabled"`
 		MailboxLimitOverride *int      `json:"mailboxLimitOverride"`
+		StorageQuotaMB       *int      `json:"storageQuotaMb"`
 		PermissionGroupIDs   *[]string `json:"permissionGroupIds"`
 	}
 	if err := decodeJSON(r, &req); err != nil {
@@ -267,6 +288,18 @@ func (a *App) handleUpdateUser(w http.ResponseWriter, r *http.Request) {
 	if role == "admin" {
 		mailboxLimitOverride = nil
 	}
+	var storageQuotaMB int
+	if err := a.db.QueryRowContext(r.Context(), `SELECT storage_quota_mb FROM users WHERE id=?`, id).Scan(&storageQuotaMB); err != nil {
+		respondError(w, http.StatusInternalServerError, "failed to load storage quota")
+		return
+	}
+	if req.StorageQuotaMB != nil {
+		storageQuotaMB = *req.StorageQuotaMB
+	}
+	if storageQuotaMB < 100 {
+		badRequest(w, errors.New("共享存储容量不能小于 100 MB"))
+		return
+	}
 	if err := a.ensureAdminRemains(r.Context(), id, role, disabled); err != nil {
 		badRequest(w, err)
 		return
@@ -311,8 +344,8 @@ func (a *App) handleUpdateUser(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	defer tx.Rollback()
-	if _, err := tx.ExecContext(r.Context(), `UPDATE users SET login_name=?, email=?, display_name=?, role=?, disabled=?, mailbox_limit_override=?, updated_at=? WHERE id=?`,
-		loginName, primaryEmail, displayName, role, boolInt(disabled), nullableInt(mailboxLimitOverride), a.now().UTC().Format(time.RFC3339Nano), id); err != nil {
+	if _, err := tx.ExecContext(r.Context(), `UPDATE users SET login_name=?, email=?, display_name=?, role=?, disabled=?, mailbox_limit_override=?, storage_quota_mb=?, updated_at=? WHERE id=?`,
+		loginName, primaryEmail, displayName, role, boolInt(disabled), nullableInt(mailboxLimitOverride), storageQuotaMB, a.now().UTC().Format(time.RFC3339Nano), id); err != nil {
 		if strings.Contains(strings.ToLower(err.Error()), "unique") {
 			badRequest(w, errors.New("主登录邮箱已被使用"))
 			return
@@ -409,11 +442,8 @@ func (a *App) handleDeleteUser(w http.ResponseWriter, r *http.Request) {
 	if target, err := a.userByID(r.Context(), id); err != nil {
 		respondError(w, http.StatusNotFound, "user not found")
 		return
-	} else if a.isDefaultAdminUser(target) {
-		badRequest(w, errors.New("default administrator cannot be deleted"))
-		return
-	} else if target.Role == "admin" && (current == nil || current.Role != "admin") {
-		respondError(w, http.StatusForbidden, "only administrators can delete administrator users")
+	} else if target.Role == "admin" {
+		badRequest(w, errors.New("administrator accounts cannot be deleted"))
 		return
 	}
 	if err := a.ensureAdminRemains(r.Context(), id, "user", true); err != nil {
@@ -553,6 +583,7 @@ func (a *App) handleListMailboxes(w http.ResponseWriter, r *http.Request) {
 		m.CreatedAt = parseTime(created)
 		items = append(items, m)
 	}
+	markPrimaryMailboxes(items)
 	respondJSON(w, http.StatusOK, map[string]any{"items": items})
 }
 
@@ -563,7 +594,6 @@ func (a *App) handleCreateMailbox(w http.ResponseWriter, r *http.Request) {
 		DisplayName    string `json:"displayName"`
 		Password       string `json:"password"`
 		QuotaMB        int    `json:"quotaMb"`
-		Role           string `json:"role"`
 		OwnerLoginName string `json:"ownerLoginName"`
 		OwnerEmail     string `json:"ownerEmail"`
 		UserID         string `json:"userId"`
@@ -580,20 +610,9 @@ func (a *App) handleCreateMailbox(w http.ResponseWriter, r *http.Request) {
 		badRequest(w, err)
 		return
 	}
-	if !hasMinimumPasswordLength(req.Password) {
-		badRequest(w, errors.New("password must be at least 6 characters"))
-		return
-	}
-	role := req.Role
-	if role == "" {
-		role = "user"
-	}
-	if role != "user" && role != "admin" {
-		badRequest(w, errors.New("invalid role"))
-		return
-	}
-	if role == "admin" {
-		respondError(w, http.StatusForbidden, "管理员只能由安装流程创建")
+	userID := strings.TrimSpace(req.UserID)
+	if req.QuotaMB < 0 {
+		badRequest(w, errors.New("quotaMb must be zero or greater"))
 		return
 	}
 
@@ -611,15 +630,14 @@ func (a *App) handleCreateMailbox(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	defer tx.Rollback()
-	now := a.now().UTC().Format(time.RFC3339Nano)
-	userID := strings.TrimSpace(req.UserID)
 	displayName := req.DisplayName
 	if displayName == "" {
 		displayName = address
 	}
+	var disabled, ownerStorageQuotaMB int
+	var passwordHash, ownerRole string
 	if userID != "" {
-		var disabled int
-		if err := tx.QueryRowContext(r.Context(), `SELECT disabled FROM users WHERE id=?`, userID).Scan(&disabled); err != nil {
+		if err := tx.QueryRowContext(r.Context(), `SELECT disabled,password_hash,role,storage_quota_mb FROM users WHERE id=?`, userID).Scan(&disabled, &passwordHash, &ownerRole, &ownerStorageQuotaMB); err != nil {
 			if errors.Is(err, sql.ErrNoRows) {
 				respondError(w, http.StatusNotFound, "owner user not found")
 			} else {
@@ -627,11 +645,11 @@ func (a *App) handleCreateMailbox(w http.ResponseWriter, r *http.Request) {
 			}
 			return
 		}
-		if intBool(disabled) {
-			badRequest(w, errors.New("owner user is disabled"))
+	} else {
+		if !hasMinimumPasswordLength(req.Password) {
+			badRequest(w, errors.New("password must be at least 6 characters"))
 			return
 		}
-	} else {
 		ownerEmailInput := req.OwnerEmail
 		if strings.TrimSpace(ownerEmailInput) == "" && strings.Contains(strings.TrimSpace(req.OwnerLoginName), "@") {
 			ownerEmailInput = req.OwnerLoginName
@@ -641,21 +659,20 @@ func (a *App) handleCreateMailbox(w http.ResponseWriter, r *http.Request) {
 			badRequest(w, err)
 			return
 		}
-		err = tx.QueryRowContext(r.Context(), `SELECT id FROM users WHERE email=? AND disabled=0`, ownerEmail).Scan(&userID)
+		err = tx.QueryRowContext(r.Context(), `SELECT id,disabled,password_hash,role,storage_quota_mb FROM users WHERE email=?`, ownerEmail).Scan(&userID, &disabled, &passwordHash, &ownerRole, &ownerStorageQuotaMB)
 		if errors.Is(err, sql.ErrNoRows) {
-			passwordHash, err := bcrypt.GenerateFromPassword([]byte(req.Password), bcrypt.DefaultCost)
-			if err != nil {
+			hash, hashErr := bcrypt.GenerateFromPassword([]byte(req.Password), bcrypt.DefaultCost)
+			if hashErr != nil {
 				respondError(w, http.StatusInternalServerError, "failed to hash password")
 				return
 			}
 			userID = newID("usr")
-			ownerDisplayName := displayName
-			if !strings.EqualFold(ownerEmail, address) {
-				ownerDisplayName = ownerEmail
-			}
-			_, err = tx.ExecContext(r.Context(), `INSERT INTO users(id,login_name,email,display_name,role,password_hash,disabled,created_at,updated_at)
-				VALUES(?,?,?,?,?,?,?,?,?)`, userID, ownerEmail, ownerEmail, ownerDisplayName, role, string(passwordHash), 0, now, now)
-			if err != nil {
+			passwordHash = string(hash)
+			ownerRole = "user"
+			ownerStorageQuotaMB = defaultUserStorageQuotaMB
+			now := a.now().UTC().Format(time.RFC3339Nano)
+			if _, err = tx.ExecContext(r.Context(), `INSERT INTO users(id,login_name,email,display_name,role,password_hash,disabled,storage_quota_mb,created_at,updated_at)
+				VALUES(?,?,?,?,?,?,?,?,?,?)`, userID, ownerEmail, ownerEmail, displayName, ownerRole, passwordHash, 0, ownerStorageQuotaMB, now, now); err != nil {
 				badRequest(w, err)
 				return
 			}
@@ -664,16 +681,26 @@ func (a *App) handleCreateMailbox(w http.ResponseWriter, r *http.Request) {
 			return
 		}
 	}
-	if err := tx.Commit(); err != nil {
-		respondError(w, http.StatusInternalServerError, "failed to prepare owner user")
+	if intBool(disabled) {
+		badRequest(w, errors.New("owner user is disabled"))
 		return
 	}
-
-	mailboxID, err := a.createMailbox(r.Context(), userID, req.DomainID, local, displayName, req.Password, req.QuotaMB, "active")
+	quotaMB := req.QuotaMB
+	if quotaMB == 0 {
+		quotaMB = ownerStorageQuotaMB
+	}
+	if ownerRole == "admin" {
+		quotaMB = 0
+	}
+	mailboxID, err := a.createMailboxWithPasswordHashTx(r.Context(), tx, userID, req.DomainID, local, displayName, passwordHash, quotaMB, "active")
 	if err != nil {
 		badRequest(w, err)
 		return
 	}
+	if err := tx.Commit(); err != nil {
+		respondError(w, http.StatusInternalServerError, "failed to create mailbox")
+		return
+	}
 	m, err := a.mailboxByID(r.Context(), mailboxID)
 	if err != nil {
 		respondError(w, http.StatusInternalServerError, "failed to load mailbox")
@@ -699,8 +726,9 @@ func (a *App) handleUpdateMailbox(w http.ResponseWriter, r *http.Request) {
 		badRequest(w, errors.New("displayName is required"))
 		return
 	}
-	if req.QuotaMB <= 0 {
-		req.QuotaMB = 1024
+	if req.QuotaMB < 0 {
+		badRequest(w, errors.New("quotaMb must be zero or greater"))
+		return
 	}
 	status := strings.TrimSpace(req.Status)
 	if status == "" {
@@ -710,13 +738,27 @@ func (a *App) handleUpdateMailbox(w http.ResponseWriter, r *http.Request) {
 		badRequest(w, errors.New("invalid status"))
 		return
 	}
+	existingMailbox, err := a.mailboxByID(r.Context(), id)
+	if err != nil {
+		respondError(w, http.StatusNotFound, "mailbox not found")
+		return
+	}
+	if existingMailbox.Primary && status != existingMailbox.Status {
+		badRequest(w, errors.New("用户默认邮箱状态由所属账号管理，不能单独修改"))
+		return
+	}
 	userID := strings.TrimSpace(req.UserID)
 	if userID == "" {
 		badRequest(w, errors.New("userId is required"))
 		return
 	}
+	if existingMailbox.Primary && userID != existingMailbox.UserID {
+		badRequest(w, errors.New("用户默认邮箱归属由所属账号管理，不能单独修改"))
+		return
+	}
 	var disabled int
-	if err := a.db.QueryRowContext(r.Context(), `SELECT disabled FROM users WHERE id=?`, userID).Scan(&disabled); err != nil {
+	var ownerRole, ownerPasswordHash string
+	if err := a.db.QueryRowContext(r.Context(), `SELECT disabled,role,password_hash FROM users WHERE id=?`, userID).Scan(&disabled, &ownerRole, &ownerPasswordHash); err != nil {
 		if errors.Is(err, sql.ErrNoRows) {
 			respondError(w, http.StatusNotFound, "owner user not found")
 		} else {
@@ -728,8 +770,11 @@ func (a *App) handleUpdateMailbox(w http.ResponseWriter, r *http.Request) {
 		badRequest(w, errors.New("owner user is disabled"))
 		return
 	}
-	res, err := a.db.ExecContext(r.Context(), `UPDATE mailboxes SET user_id=?,display_name=?,quota_mb=?,status=?,updated_at=? WHERE id=?`,
-		userID, displayName, req.QuotaMB, status, a.now().UTC().Format(time.RFC3339Nano), id)
+	if ownerRole == "admin" {
+		req.QuotaMB = 0
+	}
+	res, err := a.db.ExecContext(r.Context(), `UPDATE mailboxes SET user_id=?,display_name=?,password_hash=?,quota_mb=?,status=?,updated_at=? WHERE id=?`,
+		userID, displayName, ownerPasswordHash, req.QuotaMB, status, a.now().UTC().Format(time.RFC3339Nano), id)
 	if err != nil {
 		respondError(w, http.StatusInternalServerError, "failed to update mailbox")
 		return
@@ -749,6 +794,14 @@ func (a *App) handleUpdateMailbox(w http.ResponseWriter, r *http.Request) {
 
 func (a *App) handleDeleteMailbox(w http.ResponseWriter, r *http.Request) {
 	id := chi.URLParam(r, "id")
+	if err := a.ensureMailboxDeletable(r.Context(), id); err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			respondError(w, http.StatusNotFound, "邮箱不存在或已被删除")
+		} else {
+			badRequest(w, err)
+		}
+		return
+	}
 	rows, err := a.db.QueryContext(r.Context(), `SELECT id FROM messages WHERE mailbox_id=?`, id)
 	if err != nil {
 		respondError(w, http.StatusInternalServerError, "加载邮箱邮件失败")
@@ -1118,15 +1171,15 @@ func (a *App) domainByID(ctx context.Context, id string) (*Domain, error) {
 }
 
 func (a *App) adminUserByID(ctx context.Context, id string) (*AdminUser, error) {
-	row := a.db.QueryRowContext(ctx, `SELECT u.id,u.login_name,u.email,u.display_name,u.role,u.disabled,u.two_factor_enabled,u.mailbox_limit_override,u.created_at,COUNT(mb.id),COALESCE(GROUP_CONCAT(mb.address), '')
+	row := a.db.QueryRowContext(ctx, `SELECT u.id,u.login_name,u.email,u.display_name,u.role,u.disabled,u.two_factor_enabled,u.mailbox_limit_override,u.storage_quota_mb,u.created_at,COUNT(mb.id),COALESCE(GROUP_CONCAT(mb.address), '')
 		FROM users u LEFT JOIN mailboxes mb ON mb.user_id=u.id
 		WHERE u.id=?
-		GROUP BY u.id,u.login_name,u.email,u.display_name,u.role,u.disabled,u.two_factor_enabled,u.mailbox_limit_override,u.created_at`, id)
+		GROUP BY u.id,u.login_name,u.email,u.display_name,u.role,u.disabled,u.two_factor_enabled,u.mailbox_limit_override,u.storage_quota_mb,u.created_at`, id)
 	var item AdminUser
 	var disabled, twoFactorEnabled int
 	var mailboxLimitOverride sql.NullInt64
 	var created, mailboxCSV string
-	if err := row.Scan(&item.ID, &item.LoginName, &item.Email, &item.DisplayName, &item.Role, &disabled, &twoFactorEnabled, &mailboxLimitOverride, &created, &item.MailboxCount, &mailboxCSV); err != nil {
+	if err := row.Scan(&item.ID, &item.LoginName, &item.Email, &item.DisplayName, &item.Role, &disabled, &twoFactorEnabled, &mailboxLimitOverride, &item.StorageQuotaMB, &created, &item.MailboxCount, &mailboxCSV); err != nil {
 		return nil, err
 	}
 	item.Disabled = intBool(disabled)
@@ -1191,9 +1244,48 @@ func (a *App) mailboxByID(ctx context.Context, id string) (*Mailbox, error) {
 		return nil, err
 	}
 	m.CreatedAt = parseTime(created)
+	if err := a.markMailboxPrimary(ctx, &m); err != nil {
+		return nil, err
+	}
 	return &m, nil
 }
 
+func markPrimaryMailboxes(items []Mailbox) {
+	primaryByUser := make(map[string]int)
+	for i := range items {
+		candidate, ok := primaryByUser[items[i].UserID]
+		if !ok || strings.EqualFold(items[i].Address, items[i].UserEmail) || (!strings.EqualFold(items[candidate].Address, items[candidate].UserEmail) && (items[i].CreatedAt.Before(items[candidate].CreatedAt) || (items[i].CreatedAt.Equal(items[candidate].CreatedAt) && items[i].ID < items[candidate].ID))) {
+			primaryByUser[items[i].UserID] = i
+		}
+	}
+	for _, index := range primaryByUser {
+		items[index].Primary = true
+	}
+}
+
+func (a *App) markMailboxPrimary(ctx context.Context, mailbox *Mailbox) error {
+	var primaryID string
+	err := a.db.QueryRowContext(ctx, `SELECT mb.id FROM mailboxes mb JOIN users u ON u.id=mb.user_id
+		WHERE mb.user_id=?
+		ORDER BY CASE WHEN lower(mb.address)=lower(u.email) THEN 0 ELSE 1 END, mb.created_at, mb.id LIMIT 1`, mailbox.UserID).Scan(&primaryID)
+	if err != nil {
+		return err
+	}
+	mailbox.Primary = mailbox.ID == primaryID
+	return nil
+}
+
+func (a *App) ensureMailboxDeletable(ctx context.Context, id string) error {
+	mailbox, err := a.mailboxByID(ctx, id)
+	if err != nil {
+		return err
+	}
+	if mailbox.Primary {
+		return errors.New("用户默认邮箱不能删除")
+	}
+	return nil
+}
+
 func (a *App) mailboxForUser(ctx context.Context, userID string) (*Mailbox, error) {
 	row := a.db.QueryRowContext(ctx, `SELECT id,user_id,domain_id,local_part,address,display_name,quota_mb,status,created_at FROM mailboxes WHERE user_id=? AND status='active' ORDER BY created_at LIMIT 1`, userID)
 	var m Mailbox

apps/api/internal/app/app.go

@@ -38,8 +38,17 @@ type App struct {
 	telegramPairMu     sync.Mutex
 	telegramPairs      map[string]telegramPairing
 	telegramDeliveryMu sync.Mutex
+	backupMu           sync.Mutex
+	backupJob          *backupJob
+	backupTransfers    map[string]*backupTransfer
 }
 
+const (
+	defaultUserStorageQuotaMB  = 100
+	defaultAdminStorageQuotaMB = 1024
+	minimumStorageQuotaMB      = 100
+)
+
 func (a *App) config() Config {
 	a.cfgMu.RLock()
 	defer a.cfgMu.RUnlock()
@@ -75,7 +84,7 @@ func New(cfg Config, logger *slog.Logger) (*App, error) {
 	}
 	db.SetMaxOpenConns(1)
 
-	a := &App{cfg: cfg, db: db, log: logger, now: time.Now, policy: NewHTMLPolicy(), maildirHealth: newMaildirSyncHealthTracker(), telegramURL: "https://api.telegram.org", telegramPairs: map[string]telegramPairing{}}
+	a := &App{cfg: cfg, db: db, log: logger, now: time.Now, policy: NewHTMLPolicy(), maildirHealth: newMaildirSyncHealthTracker(), telegramURL: "https://api.telegram.org", telegramPairs: map[string]telegramPairing{}, backupTransfers: map[string]*backupTransfer{}}
 	a.externalIMAP = a
 	if err := a.configureSQLite(context.Background()); err != nil {
 		db.Close()
@@ -97,6 +106,10 @@ func New(cfg Config, logger *slog.Logger) (*App, error) {
 		db.Close()
 		return nil, err
 	}
+	if err := a.normalizeAdministratorMailboxQuotas(context.Background()); err != nil {
+		db.Close()
+		return nil, err
+	}
 	if err := a.initializeTelegramNotificationDefaults(context.Background()); err != nil {
 		db.Close()
 		return nil, err
@@ -120,6 +133,7 @@ func New(cfg Config, logger *slog.Logger) (*App, error) {
 	a.startWorker(func() { a.smtpEventsCleanupWorker(workerCtx) })
 	a.startWorker(func() { a.statusWebhookWorker(workerCtx) })
 	a.startWorker(func() { a.telegramMailWorker(workerCtx) })
+	a.startWorker(func() { a.backupScheduleWorker(workerCtx) })
 	return a, nil
 }
 
@@ -168,6 +182,7 @@ func (a *App) migrate(ctx context.Context) error {
 			two_factor_secret TEXT NOT NULL DEFAULT '',
 			two_factor_enabled INTEGER NOT NULL DEFAULT 0,
 			mailbox_limit_override INTEGER,
+			storage_quota_mb INTEGER NOT NULL DEFAULT 100,
 			disabled INTEGER NOT NULL DEFAULT 0,
 			created_at TEXT NOT NULL,
 			updated_at TEXT NOT NULL
@@ -673,6 +688,9 @@ func (a *App) migrate(ctx context.Context) error {
 	if err := a.migrateUserMailboxLimitOverride(ctx); err != nil {
 		return err
 	}
+	if err := a.migrateUserStorageQuota(ctx); err != nil {
+		return err
+	}
 	if err := a.migrateMailRulesBuilder(ctx); err != nil {
 		return err
 	}
@@ -1335,6 +1353,39 @@ func (a *App) migrateUserMailboxLimitOverride(ctx context.Context) error {
 	return err
 }
 
+func (a *App) migrateUserStorageQuota(ctx context.Context) error {
+	rows, err := a.db.QueryContext(ctx, `PRAGMA table_info(users)`)
+	if err != nil {
+		return err
+	}
+	hasColumn := false
+	for rows.Next() {
+		var cid int
+		var name, typ string
+		var notnull int
+		var dflt any
+		var pk int
+		if err := rows.Scan(&cid, &name, &typ, &notnull, &dflt, &pk); err != nil {
+			rows.Close()
+			return err
+		}
+		if name == "storage_quota_mb" {
+			hasColumn = true
+		}
+	}
+	if err := rows.Close(); err != nil {
+		return err
+	}
+	if hasColumn {
+		return nil
+	}
+	if _, err := a.db.ExecContext(ctx, `ALTER TABLE users ADD COLUMN storage_quota_mb INTEGER NOT NULL DEFAULT 100`); err != nil {
+		return err
+	}
+	_, err = a.db.ExecContext(ctx, `UPDATE users SET storage_quota_mb=? WHERE role='admin'`, defaultAdminStorageQuotaMB)
+	return err
+}
+
 func (a *App) migrateMessagesForUnregistered(ctx context.Context) error {
 	rows, err := a.db.QueryContext(ctx, `PRAGMA table_info(messages)`)
 	if err != nil {
@@ -1513,8 +1564,8 @@ func (a *App) seed(ctx context.Context) error {
 	}
 	now := a.now().UTC().Format(time.RFC3339Nano)
 	userID := newID("usr")
-	if _, err := a.db.ExecContext(ctx, `INSERT INTO users(id,login_name,email,display_name,role,password_hash,disabled,created_at,updated_at)
-		VALUES(?,?,?,?,?,?,?,?,?)`, userID, adminEmail, adminEmail, "NewSzxcn Admin", "admin", string(passwordHash), 0, now, now); err != nil {
+	if _, err := a.db.ExecContext(ctx, `INSERT INTO users(id,login_name,email,display_name,role,password_hash,disabled,storage_quota_mb,created_at,updated_at)
+		VALUES(?,?,?,?,?,?,?,?,?,?)`, userID, adminEmail, adminEmail, "NewSzxcn Admin", "admin", string(passwordHash), 0, defaultAdminStorageQuotaMB, now, now); err != nil {
 		return err
 	}
 	a.log.Warn("created default administrator; change LANQIN_ADMIN_PASSWORD in production", "email", adminEmail)
@@ -1535,7 +1586,7 @@ func (a *App) seed(ctx context.Context) error {
 	}
 
 	// Create mailbox for admin
-	mailboxID, err := a.createMailboxWithPasswordHash(ctx, userID, domainID, localPart, adminEmail, string(passwordHash), 1024, "active")
+	mailboxID, err := a.createMailboxWithPasswordHash(ctx, userID, domainID, localPart, adminEmail, string(passwordHash), 0, "active")
 	if err != nil {
 		return err
 	}
@@ -1656,7 +1707,7 @@ func (a *App) migrateConfiguredAdministratorIdentity(ctx context.Context) error
 		if !errors.Is(err, sql.ErrNoRows) {
 			return err
 		}
-		mailboxID, err = a.createMailboxWithPasswordHashTx(ctx, tx, keeper.ID, domainID, localPart, adminEmail, keeper.PasswordHash, 1024, "active")
+		mailboxID, err = a.createMailboxWithPasswordHashTx(ctx, tx, keeper.ID, domainID, localPart, adminEmail, keeper.PasswordHash, 0, "active")
 		if err != nil {
 			return err
 		}
@@ -1871,8 +1922,15 @@ func (a *App) createMailboxWithPasswordHashTx(ctx context.Context, tx *sql.Tx, u
 	if localPart == "" {
 		return "", errors.New("invalid local part")
 	}
-	if quotaMB <= 0 {
-		quotaMB = 1024
+	if quotaMB < 0 {
+		return "", errors.New("quotaMb must be zero or greater")
+	}
+	var ownerRole string
+	if err := tx.QueryRowContext(ctx, `SELECT role FROM users WHERE id=?`, userID).Scan(&ownerRole); err != nil {
+		return "", err
+	}
+	if ownerRole == "admin" {
+		quotaMB = 0
 	}
 	if status == "" {
 		status = "active"
@@ -1905,6 +1963,17 @@ func (a *App) createMailboxWithPasswordHashTx(ctx context.Context, tx *sql.Tx, u
 	return id, nil
 }
 
+func (a *App) normalizeAdministratorMailboxQuotas(ctx context.Context) error {
+	now := a.now().UTC().Format(time.RFC3339Nano)
+	if _, err := a.db.ExecContext(ctx, `UPDATE users SET storage_quota_mb=CASE WHEN role='admin' THEN ? ELSE ? END, updated_at=? WHERE storage_quota_mb<?`, defaultAdminStorageQuotaMB, defaultUserStorageQuotaMB, now, minimumStorageQuotaMB); err != nil {
+		return err
+	}
+	_, err := a.db.ExecContext(ctx, `UPDATE mailboxes
+		SET quota_mb=0, updated_at=?
+		WHERE quota_mb<>0 AND user_id IN (SELECT id FROM users WHERE role='admin')`, now)
+	return err
+}
+
 func (a *App) seedWelcomeMessage(ctx context.Context, mailboxID string) error {
 	cfg := a.config()
 	folderID, err := a.ensureFolder(ctx, mailboxID, "Inbox")

apps/api/internal/app/app_test.go

@@ -363,6 +363,147 @@ func createTestMailbox(t *testing.T, admin *testClient, domainID, localPart, dis
 	return mailbox
 }
 
+func TestAdminMailboxCreationUsesOwnerPasswordAndQuota(t *testing.T) {
+	a := newTestApp(t)
+	ts := httptest.NewServer(a.Router())
+	defer ts.Close()
+	admin := &testClient{t: t, server: ts}
+	var login map[string]any
+	if code := admin.do("POST", "/api/auth/login", map[string]string{"email": "admin@lanqin.local", "password": "ChangeMe123!"}, &login); code != http.StatusOK {
+		t.Fatalf("login code=%d body=%v", code, login)
+	}
+	adminUser, adminMailbox := defaultAdminUserAndMailbox(t, a)
+	adminDetails, err := a.adminUserByID(context.Background(), adminUser.ID)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if adminDetails.StorageQuotaMB != defaultAdminStorageQuotaMB {
+		t.Fatalf("administrator storage quota=%d, want %d", adminDetails.StorageQuotaMB, defaultAdminStorageQuotaMB)
+	}
+	domainID := mustDefaultDomainID(t, a)
+
+	var secondary Mailbox
+	if code := admin.do("POST", "/api/admin/mailboxes", map[string]any{
+		"domainId":  domainID,
+		"localPart": "admin-secondary",
+		"userId":    adminUser.ID,
+	}, &secondary); code != http.StatusCreated {
+		t.Fatalf("create admin secondary mailbox code=%d", code)
+	}
+	if secondary.QuotaMB != 0 {
+		t.Fatalf("admin secondary quota=%d, want unlimited", secondary.QuotaMB)
+	}
+
+	var primaryHash, secondaryHash string
+	if err := a.db.QueryRow(`SELECT password_hash FROM mailboxes WHERE id=?`, adminMailbox.ID).Scan(&primaryHash); err != nil {
+		t.Fatal(err)
+	}
+	if err := a.db.QueryRow(`SELECT password_hash FROM mailboxes WHERE id=?`, secondary.ID).Scan(&secondaryHash); err != nil {
+		t.Fatal(err)
+	}
+	if primaryHash != secondaryHash {
+		t.Fatal("admin secondary mailbox did not inherit the owner password")
+	}
+
+	var regular AdminUser
+	if code := admin.do("POST", "/api/admin/users", map[string]any{
+		"email":       "owner@lanqin.local",
+		"displayName": "Owner",
+		"password":    "OwnerPassword123!",
+		"role":        "user",
+	}, &regular); code != http.StatusCreated {
+		t.Fatalf("create regular owner code=%d", code)
+	}
+	if regular.MailboxCount != 1 {
+		t.Fatalf("new account mailbox count=%d, want one protected primary mailbox", regular.MailboxCount)
+	}
+	if regular.StorageQuotaMB != defaultUserStorageQuotaMB {
+		t.Fatalf("regular account storage quota=%d, want %d", regular.StorageQuotaMB, defaultUserStorageQuotaMB)
+	}
+	if _, err := a.mailboxByAddress(context.Background(), regular.Email); err != nil {
+		t.Fatalf("new account primary mailbox missing: %v", err)
+	}
+	var primaryStatusErr map[string]any
+	primaryMailbox, err := a.mailboxByAddress(context.Background(), regular.Email)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if code := admin.do("POST", "/api/admin/mailboxes/"+primaryMailbox.ID, map[string]any{
+		"userId": regular.ID, "displayName": primaryMailbox.DisplayName, "quotaMb": primaryMailbox.QuotaMB, "status": "disabled",
+	}, &primaryStatusErr); code != http.StatusBadRequest {
+		t.Fatalf("primary mailbox status update code=%d body=%v", code, primaryStatusErr)
+	}
+	var regularMailbox Mailbox
+	if code := admin.do("POST", "/api/admin/mailboxes", map[string]any{
+		"domainId":  domainID,
+		"localPart": "owner-secondary",
+		"userId":    regular.ID,
+	}, &regularMailbox); code != http.StatusCreated {
+		t.Fatalf("create regular secondary mailbox code=%d", code)
+	}
+	if regularMailbox.QuotaMB != defaultUserStorageQuotaMB {
+		t.Fatalf("regular secondary quota=%d, want %d", regularMailbox.QuotaMB, defaultUserStorageQuotaMB)
+	}
+	var userHash, mailboxHash string
+	if err := a.db.QueryRow(`SELECT password_hash FROM users WHERE id=?`, regular.ID).Scan(&userHash); err != nil {
+		t.Fatal(err)
+	}
+	if err := a.db.QueryRow(`SELECT password_hash FROM mailboxes WHERE id=?`, regularMailbox.ID).Scan(&mailboxHash); err != nil {
+		t.Fatal(err)
+	}
+	if userHash != mailboxHash {
+		t.Fatal("regular secondary mailbox did not inherit the owner password")
+	}
+}
+
+func TestAdministratorAccountAndPrimaryMailboxesCannotBeDeleted(t *testing.T) {
+	a := newTestApp(t)
+	ts := httptest.NewServer(a.Router())
+	defer ts.Close()
+	admin := &testClient{t: t, server: ts}
+	var login map[string]any
+	if code := admin.do("POST", "/api/auth/login", map[string]string{"email": "admin@lanqin.local", "password": "ChangeMe123!"}, &login); code != http.StatusOK {
+		t.Fatalf("login code=%d body=%v", code, login)
+	}
+	adminUser, adminMailbox := defaultAdminUserAndMailbox(t, a)
+	var errBody map[string]any
+	if code := admin.do("DELETE", "/api/admin/users/"+adminUser.ID, nil, &errBody); code != http.StatusBadRequest {
+		t.Fatalf("administrator account delete code=%d body=%v", code, errBody)
+	}
+	if code := admin.do("DELETE", "/api/admin/mailboxes/"+adminMailbox.ID, nil, &errBody); code != http.StatusBadRequest {
+		t.Fatalf("administrator primary mailbox delete code=%d body=%v", code, errBody)
+	}
+	if code := admin.do("POST", "/api/admin/users/"+adminUser.ID, map[string]any{
+		"email": adminUser.Email, "displayName": adminUser.DisplayName, "role": "admin", "disabled": false, "storageQuotaMb": 99,
+	}, &errBody); code != http.StatusBadRequest {
+		t.Fatalf("storage quota below 100 MB code=%d body=%v", code, errBody)
+	}
+	var updatedAdmin AdminUser
+	if code := admin.do("POST", "/api/admin/users/"+adminUser.ID, map[string]any{
+		"email": adminUser.Email, "displayName": adminUser.DisplayName, "role": "admin", "disabled": false, "storageQuotaMb": 100,
+	}, &updatedAdmin); code != http.StatusOK || updatedAdmin.StorageQuotaMB != 100 {
+		t.Fatalf("administrator storage quota code=%d user=%+v", code, updatedAdmin)
+	}
+
+	var regular AdminUser
+	if code := admin.do("POST", "/api/admin/users", map[string]any{
+		"email": "protected-primary@lanqin.local", "displayName": "Protected Primary", "role": "user", "password": "Password123!",
+	}, &regular); code != http.StatusCreated {
+		t.Fatalf("create regular user code=%d user=%+v", code, regular)
+	}
+	primary, err := a.mailboxByAddress(context.Background(), regular.Email)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if code := admin.do("DELETE", "/api/admin/mailboxes/"+primary.ID, nil, &errBody); code != http.StatusBadRequest {
+		t.Fatalf("regular primary mailbox delete code=%d body=%v", code, errBody)
+	}
+	secondary := createTestMailbox(t, admin, primary.DomainID, "deletable-secondary", "Secondary", "", map[string]any{"userId": regular.ID})
+	if code := admin.do("DELETE", "/api/admin/mailboxes/"+secondary.ID, nil, &errBody); code != http.StatusOK {
+		t.Fatalf("secondary mailbox delete code=%d body=%v", code, errBody)
+	}
+}
+
 func createTestAPIToken(t *testing.T, client *testClient, name string) string {
 	return createTestAPITokenWithScopes(t, client, name, nil)
 }
@@ -1574,6 +1715,13 @@ func TestOpenRegistrationAtomicallyCreatesLoginUserAndMailbox(t *testing.T) {
 	if code := client.do("POST", "/api/auth/register", registration, &registered); code != http.StatusCreated || registered.User.Email != "newuser@lanqin.local" || registered.User.Role != "user" {
 		t.Fatalf("register code=%d user=%+v", code, registered.User)
 	}
+	var storageQuotaMB int
+	if err := a.db.QueryRow(`SELECT storage_quota_mb FROM users WHERE id=?`, registered.User.ID).Scan(&storageQuotaMB); err != nil {
+		t.Fatal(err)
+	}
+	if storageQuotaMB != defaultUserStorageQuotaMB {
+		t.Fatalf("registered account storage quota=%d, want %d", storageQuotaMB, defaultUserStorageQuotaMB)
+	}
 	var me struct {
 		User User `json:"user"`
 	}
@@ -3177,20 +3325,45 @@ func TestOpenAPIDomainAndMailboxCRUD(t *testing.T) {
 	if code := openAdmin.do("POST", "/api/open/domains/"+domain.ID, map[string]string{"status": "active"}, &domain); code != http.StatusOK {
 		t.Fatalf("reactivate open api domain code=%d domain=%+v", code, domain)
 	}
+	var owner AdminUser
+	if code := admin.do("POST", "/api/admin/users", map[string]any{
+		"email": "open-api-owner@lanqin.local", "displayName": "Open API Owner", "role": "user", "password": "Password123!",
+	}, &owner); code != http.StatusCreated {
+		t.Fatalf("create open api mailbox owner code=%d owner=%+v", code, owner)
+	}
 
 	var mailbox Mailbox
 	if code := openAdmin.do("POST", "/api/open/mailboxes", map[string]any{
 		"domainId":    domain.ID,
 		"localPart":   "api-user",
 		"displayName": "API User",
-		"password":    "Password123!",
+		"password":    "DifferentPassword123!",
 		"quotaMb":     256,
+		"userId":      owner.ID,
 	}, &mailbox); code != http.StatusCreated {
 		t.Fatalf("create open api mailbox code=%d mailbox=%+v", code, mailbox)
 	}
+	ownerPrimary, err := a.mailboxByAddress(context.Background(), owner.Email)
+	if err != nil {
+		t.Fatal(err)
+	}
+	var protectedMailboxErr map[string]any
+	if code := openAdmin.do("POST", "/api/open/mailboxes/"+ownerPrimary.ID, map[string]any{"status": "disabled"}, &protectedMailboxErr); code != http.StatusBadRequest {
+		t.Fatalf("open api primary mailbox status update code=%d body=%v", code, protectedMailboxErr)
+	}
 	if mailbox.Address != "api-user@api.example.test" || mailbox.QuotaMB != 256 {
 		t.Fatalf("mailbox=%+v", mailbox)
 	}
+	var ownerPasswordHash, mailboxPasswordHash string
+	if err := a.db.QueryRowContext(context.Background(), `SELECT password_hash FROM users WHERE id=?`, owner.ID).Scan(&ownerPasswordHash); err != nil {
+		t.Fatal(err)
+	}
+	if err := a.db.QueryRowContext(context.Background(), `SELECT password_hash FROM mailboxes WHERE id=?`, mailbox.ID).Scan(&mailboxPasswordHash); err != nil {
+		t.Fatal(err)
+	}
+	if mailboxPasswordHash != ownerPasswordHash {
+		t.Fatal("open api mailbox did not inherit the owner password")
+	}
 	var mailboxes struct {
 		Items []Mailbox `json:"items"`
 	}
@@ -3207,6 +3380,9 @@ func TestOpenAPIDomainAndMailboxCRUD(t *testing.T) {
 	if updated.DisplayName != "Renamed API User" || updated.QuotaMB != 512 || updated.Status != "disabled" {
 		t.Fatalf("updated mailbox=%+v", updated)
 	}
+	if code := openAdmin.do("POST", "/api/open/mailboxes/"+mailbox.ID, map[string]any{"status": "active"}, &updated); code != http.StatusOK || updated.QuotaMB != 512 {
+		t.Fatalf("open api mailbox omitted quota should preserve 512 MB: code=%d mailbox=%+v", code, updated)
+	}
 	var ok map[string]any
 	if code := openAdmin.do("DELETE", "/api/open/mailboxes/"+mailbox.ID, nil, &ok); code != http.StatusOK {
 		t.Fatalf("delete open api mailbox code=%d body=%v", code, ok)
@@ -5195,20 +5371,24 @@ func TestFixedRolesProtectAdminRoutesAndDefaultAdmin(t *testing.T) {
 	}, &errBody); code != http.StatusForbidden {
 		t.Fatalf("system permission group update should be forbidden code=%d body=%v", code, errBody)
 	}
-	var regularUpdateErr map[string]any
+	var updatedRegular PermissionGroup
 	if code := admin.do("POST", "/api/admin/permission-groups/"+PermissionGroupRegular, map[string]any{
 		"name":        "Changed Regular",
 		"description": "Should not change",
-		"permissions": []string{PermissionAdminOverview},
-	}, &regularUpdateErr); code != http.StatusForbidden {
-		t.Fatalf("regular system permission group update should be forbidden code=%d body=%v", code, regularUpdateErr)
+		"permissions": regularUserDefaultPermissions(),
+		"limits":      defaultPermissionLimits(),
+	}, &updatedRegular); code != http.StatusOK {
+		t.Fatalf("regular system permission group update code=%d group=%+v", code, updatedRegular)
+	}
+	if updatedRegular.Name != "普通用户" || updatedRegular.Description != "仅可使用自己的邮箱功能，不包含后台权限。" {
+		t.Fatalf("regular system permission group identity changed: %+v", updatedRegular)
 	}
 	regularGroup, err := a.permissionGroupByID(context.Background(), PermissionGroupRegular)
 	if err != nil {
 		t.Fatal(err)
 	}
 	if !regularGroup.System || !userHasPermission(&User{Role: "user", Permissions: regularGroup.Permissions}, PermissionMailAccess) || userHasPermission(&User{Role: "user", Permissions: regularGroup.Permissions}, PermissionAdminOverview) {
-		t.Fatalf("regular group should stay locked with default permissions=%+v", regularGroup)
+		t.Fatalf("regular group should retain the saved default permissions=%+v", regularGroup)
 	}
 	if code := admin.do("DELETE", "/api/admin/permission-groups/"+PermissionGroupSuperAdmin, nil, &errBody); code != http.StatusForbidden {
 		t.Fatalf("system permission group delete should be forbidden code=%d body=%v", code, errBody)
@@ -6357,7 +6537,7 @@ func TestMailboxQuotaRejectsNewMessage(t *testing.T) {
 	ctx := context.Background()
 	user, mb := defaultAdminUserAndMailbox(t, a)
 	clearMailboxMessagesForTest(t, a, mb.ID)
-	if _, err := a.db.ExecContext(ctx, `UPDATE mailboxes SET quota_mb=1 WHERE id=?`, mb.ID); err != nil {
+	if _, err := a.db.ExecContext(ctx, `UPDATE users SET storage_quota_mb=1 WHERE id=?`, user.ID); err != nil {
 		t.Fatal(err)
 	}
 	_, err := a.sendMailNow(ctx, user, mb, mailComposeInput{
@@ -6433,7 +6613,11 @@ func TestMailStatsQuotaAndCleanupIsolation(t *testing.T) {
 	if code := alice.do("GET", "/api/me/stats?mailboxId="+aliceMB.ID+"&days=7", nil, &stats); code != http.StatusOK {
 		t.Fatalf("stats code=%d stats=%+v", code, stats)
 	}
-	if stats.QuotaBytes != int64(aliceMB.QuotaMB)*1024*1024 || stats.AttachmentBytes == 0 || stats.QuotaUsedPct <= 0 {
+	var aliceStorageQuotaMB int64
+	if err := a.db.QueryRowContext(ctx, `SELECT storage_quota_mb FROM users WHERE id=?`, aliceUser.ID).Scan(&aliceStorageQuotaMB); err != nil {
+		t.Fatal(err)
+	}
+	if stats.QuotaBytes != aliceStorageQuotaMB*1024*1024 || stats.AttachmentBytes == 0 || stats.QuotaUsedPct <= 0 {
 		t.Fatalf("stats quota/attachment not populated: %+v", stats)
 	}
 	if stats.TotalIncoming != 1 || stats.TotalOutgoing != 0 || stats.AverageMessageBytes <= 0 {

apps/api/internal/app/auth_handlers.go

@@ -177,8 +177,8 @@ func (a *App) handleRegister(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	defer tx.Rollback()
-	if _, err := tx.ExecContext(r.Context(), `INSERT INTO users(id,login_name,email,display_name,role,password_hash,disabled,created_at,updated_at)
-		VALUES(?,?,?,?,?,?,?,?,?)`, userID, email, email, displayName, "user", string(passwordHash), 0, now, now); err != nil {
+	if _, err := tx.ExecContext(r.Context(), `INSERT INTO users(id,login_name,email,display_name,role,password_hash,disabled,storage_quota_mb,created_at,updated_at)
+		VALUES(?,?,?,?,?,?,?,?,?,?)`, userID, email, email, displayName, "user", string(passwordHash), 0, defaultUserStorageQuotaMB, now, now); err != nil {
 		if strings.Contains(strings.ToLower(err.Error()), "unique") {
 			respondError(w, http.StatusConflict, "该邮箱已被注册")
 			return
@@ -186,7 +186,7 @@ func (a *App) handleRegister(w http.ResponseWriter, r *http.Request) {
 		respondError(w, http.StatusInternalServerError, "注册失败，请稍后重试")
 		return
 	}
-	if _, err := a.createMailboxWithPasswordHashTx(r.Context(), tx, userID, mailboxDomainID, mailboxLocalPart, displayName, string(passwordHash), 1024, "active"); err != nil {
+	if _, err := a.createMailboxWithPasswordHashTx(r.Context(), tx, userID, mailboxDomainID, mailboxLocalPart, displayName, string(passwordHash), defaultUserStorageQuotaMB, "active"); err != nil {
 		if strings.Contains(strings.ToLower(err.Error()), "unique") {
 			respondError(w, http.StatusConflict, "该邮箱已被注册")
 		} else {

apps/api/internal/app/backup_handlers_test.go

@@ -0,0 +1,461 @@
+package app
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+)
+
+func TestBackupEndpointsRejectMismatchedConfirmation(t *testing.T) {
+	a := newTestApp(t)
+	stopTestWorkers(a)
+	server := httptest.NewServer(a.Router())
+	defer server.Close()
+	admin := &testClient{t: t, server: server}
+	var response map[string]any
+	if code := admin.do("POST", "/api/auth/login", map[string]string{"email": "admin@lanqin.local", "password": "ChangeMe123!"}, &response); code != http.StatusOK {
+		t.Fatalf("login code=%d body=%v", code, response)
+	}
+	response = nil
+	if code := admin.do("POST", "/api/admin/backups", map[string]any{"password": "BackupPassword123!", "confirmPassword": "DifferentPassword123!"}, &response); code != http.StatusBadRequest {
+		t.Fatalf("manual backup mismatch code=%d body=%v", code, response)
+	}
+	response = nil
+	if code := admin.do("POST", "/api/admin/backups/settings", map[string]any{"enabled": false, "days": 7, "password": "BackupPassword123!", "confirmPassword": "DifferentPassword123!"}, &response); code != http.StatusBadRequest {
+		t.Fatalf("scheduled backup mismatch code=%d body=%v", code, response)
+	}
+}
+
+func TestDiscoverTelegramGroupsReturnsUniqueCandidates(t *testing.T) {
+	telegramServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		_, _ = io.WriteString(w, `{"ok":true,"result":[`+
+			`{"update_id":1,"message":{"text":"/newszxcn ABC123","chat":{"id":-1001,"type":"supergroup","title":"主备份"}}},`+
+			`{"update_id":2,"message":{"text":"/newszxcn ABC123","chat":{"id":-1002,"type":"group","title":"异地备份"}}},`+
+			`{"update_id":3,"message":{"text":"/newszxcn ABC123","chat":{"id":-1001,"type":"supergroup","title":"主备份"}}},`+
+			`{"update_id":4,"message":{"text":"/newszxcn WRONG","chat":{"id":-1003,"type":"group","title":"无关群组"}}}]}`)
+	}))
+	defer telegramServer.Close()
+	a := newTestApp(t)
+	stopTestWorkers(a)
+	a.telegramURL = telegramServer.URL
+	groups, err := a.discoverTelegramGroups(context.Background(), "test-token", "ABC123")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(groups) != 2 || groups[0].ChatID != "-1001" || groups[1].ChatID != "-1002" {
+		t.Fatalf("unexpected groups: %+v", groups)
+	}
+}
+
+func TestGoogleDriveResumableRequest(t *testing.T) {
+	dir := t.TempDir()
+	path := filepath.Join(dir, "newszxcn-backup-test.tar.zst.enc")
+	if err := os.WriteFile(path, []byte("encrypted backup"), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	req, size, err := newGoogleDriveResumableRequest(context.Background(), path, "folder-123")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if size != int64(len("encrypted backup")) {
+		t.Fatalf("upload size = %d", size)
+	}
+	if req.URL.Query().Get("uploadType") != "resumable" || req.Header.Get("X-Upload-Content-Length") != fmt.Sprint(size) {
+		t.Fatalf("resumable request = %s headers=%v", req.URL, req.Header)
+	}
+	var metadata struct {
+		Name    string   `json:"name"`
+		Parents []string `json:"parents"`
+	}
+	if err := json.NewDecoder(req.Body).Decode(&metadata); err != nil {
+		t.Fatal(err)
+	}
+	if metadata.Name != filepath.Base(path) || len(metadata.Parents) != 1 || metadata.Parents[0] != "folder-123" {
+		t.Fatalf("metadata = %+v", metadata)
+	}
+}
+
+func TestBackupProgressReaderReportsBytes(t *testing.T) {
+	var updates []int64
+	reader := &backupProgressReader{reader: strings.NewReader("encrypted backup"), onProgress: func(uploaded int64) {
+		updates = append(updates, uploaded)
+	}}
+	raw, err := io.ReadAll(reader)
+	if err != nil || string(raw) != "encrypted backup" {
+		t.Fatalf("read = %q, %v", raw, err)
+	}
+	if len(updates) == 0 || updates[len(updates)-1] != int64(len(raw)) {
+		t.Fatalf("progress updates = %v", updates)
+	}
+}
+
+func TestGoogleDriveUploadMessage(t *testing.T) {
+	tests := []struct {
+		status int
+		body   string
+		want   string
+	}{
+		{http.StatusUnauthorized, `{}`, "授权已失效"},
+		{http.StatusForbidden, `{"reason":"storageQuotaExceeded"}`, "空间不足"},
+		{http.StatusForbidden, `{}`, "无上传权限"},
+		{http.StatusTooManyRequests, `{}`, "请求过于频繁"},
+	}
+	for _, test := range tests {
+		message := googleDriveUploadMessage(&googleDriveAPIError{Operation: "upload", StatusCode: test.status, Body: test.body})
+		if !strings.Contains(message, test.want) {
+			t.Fatalf("message %q does not contain %q", message, test.want)
+		}
+	}
+}
+
+func TestGoogleDriveChunkUploadAndProgress(t *testing.T) {
+	dir := t.TempDir()
+	path := filepath.Join(dir, "large-backup.tar.zst.enc")
+	size := int64(googleDriveUploadChunkSize + 3)
+	file, err := os.Create(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := file.Truncate(size); err != nil {
+		t.Fatal(err)
+	}
+	_ = file.Close()
+	var ranges []string
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		ranges = append(ranges, r.Header.Get("Content-Range"))
+		_, _ = io.Copy(io.Discard, r.Body)
+		if len(ranges) == 1 {
+			w.WriteHeader(http.StatusPermanentRedirect)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		_, _ = io.WriteString(w, `{"id":"uploaded"}`)
+	}))
+	defer server.Close()
+	a := newTestApp(t)
+	stopTestWorkers(a)
+	if !a.startBackupTransfer("googleDrive", path) {
+		t.Fatal("failed to start transfer")
+	}
+	if err := a.uploadGoogleDriveChunks(context.Background(), server.Client(), server.URL, path, size); err != nil {
+		t.Fatal(err)
+	}
+	wantRanges := []string{
+		fmt.Sprintf("bytes 0-%d/%d", googleDriveUploadChunkSize-1, size),
+		fmt.Sprintf("bytes %d-%d/%d", googleDriveUploadChunkSize, size-1, size),
+	}
+	if len(ranges) != len(wantRanges) || ranges[0] != wantRanges[0] || ranges[1] != wantRanges[1] {
+		t.Fatalf("content ranges = %v, want %v", ranges, wantRanges)
+	}
+	transfer := a.backupTransfers[backupTransferKey("googleDrive", path)]
+	if transfer == nil || transfer.Uploaded != size {
+		t.Fatalf("transfer = %+v", transfer)
+	}
+}
+
+func TestBackupEncryptionRequiresDeploymentSecret(t *testing.T) {
+	dir := t.TempDir()
+	a := newTestAppWithConfig(t, Config{
+		Addr: ":0", DBPath: filepath.Join(dir, "data", "lanqin.db"), DataDir: filepath.Join(dir, "data"),
+		CookieName: "lanqin_test", SessionTTLHours: 24, AdminEmail: "admin@example.com", AdminPassword: "ChangeMe123!", AllowInsecureHTTP: true,
+	})
+	if _, err := a.encryptBackupPassword("BackupPassword123!"); err == nil {
+		t.Fatal("backup password encryption succeeded without a deployment secret")
+	}
+}
+
+func TestBackupPasswordValidation(t *testing.T) {
+	for _, valid := range []string{"12345678", "Restore Password 123!"} {
+		if !validBackupPassword(valid) {
+			t.Errorf("valid password rejected: %q", valid)
+		}
+	}
+	for _, invalid := range []string{"1234567", "password\nvalue", "password\x00value", strings.Repeat("x", 1025)} {
+		if validBackupPassword(invalid) {
+			t.Errorf("invalid password accepted: %q", invalid)
+		}
+	}
+}
+
+func TestBackupPasswordHint(t *testing.T) {
+	if got := backupPasswordHint("A23456789Z"); got != "A••••••••Z" {
+		t.Fatalf("password hint = %q", got)
+	}
+	if got := backupPasswordHint("ab"); got != "ab" {
+		t.Fatalf("two-character password hint = %q", got)
+	}
+	if got := backupPasswordHint(""); got != "" {
+		t.Fatalf("empty password hint = %q", got)
+	}
+}
+
+func TestSavedBackupPasswordAndHint(t *testing.T) {
+	dir := t.TempDir()
+	a := newTestAppWithConfig(t, Config{
+		Addr: ":0", DBPath: filepath.Join(dir, "data", "lanqin.db"), DataDir: filepath.Join(dir, "data"),
+		CookieName: "lanqin_test", SessionTTLHours: 24, AdminEmail: "admin@example.com", AdminPassword: "ChangeMe123!",
+		AllowInsecureHTTP: true, UpdateServiceToken: "test-update-secret",
+	})
+	stopTestWorkers(a)
+	ciphertext, err := a.encryptBackupPassword("A23456789Z")
+	if err != nil {
+		t.Fatal(err)
+	}
+	now := a.now().UTC().Format("2006-01-02T15:04:05Z")
+	if _, err = a.db.Exec(`INSERT INTO system_settings(key,value,updated_at) VALUES('backupPasswordCipher',?,?)`, ciphertext, now); err != nil {
+		t.Fatal(err)
+	}
+	password, err := a.savedBackupPassword(context.Background())
+	if err != nil || password != "A23456789Z" {
+		t.Fatalf("saved password = %q, %v", password, err)
+	}
+	schedule, err := a.loadBackupSchedule(context.Background())
+	if err != nil || !schedule.PasswordSet || schedule.PasswordHint != "A••••••••Z" {
+		t.Fatalf("schedule password state = %+v, %v", schedule, err)
+	}
+}
+
+func TestUpdateBackupPasswordDoesNotChangeScheduleSettings(t *testing.T) {
+	dir := t.TempDir()
+	a := newTestAppWithConfig(t, Config{
+		Addr: ":0", DBPath: filepath.Join(dir, "data", "lanqin.db"), DataDir: filepath.Join(dir, "data"),
+		CookieName: "lanqin_test", SessionTTLHours: 24, AdminEmail: "admin@example.com", AdminPassword: "ChangeMe123!",
+		AllowInsecureHTTP: true, UpdateServiceToken: "test-update-secret",
+	})
+	stopTestWorkers(a)
+	now := a.now().UTC().Format(time.RFC3339Nano)
+	for key, value := range map[string]string{
+		"backupScheduleEnabled":  "true",
+		"backupScheduleDays":     "30",
+		"backupTelegramMode":     "custom",
+		"backupTelegramChatId":   "-1001234567890",
+		"backupGoogleFolderName": "Existing Backups",
+	} {
+		if _, err := a.db.Exec(`INSERT INTO system_settings(key,value,updated_at) VALUES(?,?,?)`, key, value, now); err != nil {
+			t.Fatal(err)
+		}
+	}
+	server := httptest.NewServer(a.Router())
+	defer server.Close()
+	admin := &testClient{t: t, server: server}
+	var response map[string]any
+	if code := admin.do("POST", "/api/auth/login", map[string]string{"email": "admin@example.com", "password": "ChangeMe123!"}, &response); code != http.StatusOK {
+		t.Fatalf("login code=%d body=%v", code, response)
+	}
+	response = nil
+	if code := admin.do("POST", "/api/admin/backups/password", map[string]string{"password": "NewSharedPassword9", "confirmPassword": "NewSharedPassword9"}, &response); code != http.StatusOK {
+		t.Fatalf("password update code=%d body=%v", code, response)
+	}
+	if response["passwordHint"] != "N••••••••••9" {
+		t.Fatalf("password hint = %v", response["passwordHint"])
+	}
+	password, err := a.savedBackupPassword(context.Background())
+	if err != nil || password != "NewSharedPassword9" {
+		t.Fatalf("saved password = %q, %v", password, err)
+	}
+	for key, want := range map[string]string{
+		"backupScheduleEnabled":  "true",
+		"backupScheduleDays":     "30",
+		"backupTelegramMode":     "custom",
+		"backupTelegramChatId":   "-1001234567890",
+		"backupGoogleFolderName": "Existing Backups",
+	} {
+		var got string
+		if err := a.db.QueryRow(`SELECT value FROM system_settings WHERE key=?`, key).Scan(&got); err != nil || got != want {
+			t.Fatalf("setting %s = %q, %v; want %q", key, got, err, want)
+		}
+	}
+}
+
+func TestManualBackupReusesSavedPassword(t *testing.T) {
+	dir := t.TempDir()
+	deployDir := filepath.Join(dir, "deploy")
+	if err := os.MkdirAll(deployDir, 0o700); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(filepath.Join(deployDir, "docker-compose.yml"), []byte("services: {}\n"), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	a := newTestAppWithConfig(t, Config{
+		Addr: ":0", DBPath: filepath.Join(dir, "data", "lanqin.db"), DataDir: filepath.Join(dir, "data"),
+		CookieName: "lanqin_test", SessionTTLHours: 24, AdminEmail: "admin@example.com", AdminPassword: "ChangeMe123!",
+		AllowInsecureHTTP: true, UpdateServiceToken: "test-update-secret", BackupSourceDir: deployDir,
+		BackupDir: filepath.Join(dir, "data", "disaster-backups"),
+	})
+	stopTestWorkers(a)
+	ciphertext, err := a.encryptBackupPassword("SharedBackupPassword9")
+	if err != nil {
+		t.Fatal(err)
+	}
+	now := a.now().UTC().Format("2006-01-02T15:04:05Z")
+	if _, err = a.db.Exec(`INSERT INTO system_settings(key,value,updated_at) VALUES('backupPasswordCipher',?,?)`, ciphertext, now); err != nil {
+		t.Fatal(err)
+	}
+	server := httptest.NewServer(a.Router())
+	defer server.Close()
+	admin := &testClient{t: t, server: server}
+	var response map[string]any
+	if code := admin.do("POST", "/api/auth/login", map[string]string{"email": "admin@example.com", "password": "ChangeMe123!"}, &response); code != http.StatusOK {
+		t.Fatalf("login code=%d body=%v", code, response)
+	}
+	response = nil
+	if code := admin.do("POST", "/api/admin/backups", map[string]any{"password": "", "confirmPassword": "", "sendTelegram": false, "uploadGoogleDrive": false}, &response); code != http.StatusAccepted {
+		t.Fatalf("manual backup code=%d body=%v", code, response)
+	}
+	password, err := a.savedBackupPassword(context.Background())
+	if err != nil || password != "SharedBackupPassword9" {
+		t.Fatalf("saved password changed: %q, %v", password, err)
+	}
+	deadline := time.Now().Add(10 * time.Second)
+	for {
+		a.backupMu.Lock()
+		status := a.backupJob.Status
+		a.backupMu.Unlock()
+		if status != "running" {
+			break
+		}
+		if time.Now().After(deadline) {
+			t.Fatal("manual backup did not finish before timeout")
+		}
+		time.Sleep(20 * time.Millisecond)
+	}
+}
+
+func TestPublicServerIPValidation(t *testing.T) {
+	for _, value := range []string{"203.0.113.10", "2001:4860:4860::8888"} {
+		if !isPublicIP(net.ParseIP(value)) {
+			t.Errorf("public IP rejected: %s", value)
+		}
+	}
+	for _, value := range []string{"127.0.0.1", "10.0.0.1", "192.168.1.1", "169.254.1.1", "::1", "fc00::1"} {
+		if isPublicIP(net.ParseIP(value)) {
+			t.Errorf("non-public IP accepted: %s", value)
+		}
+	}
+	if got := detectPublicServerIP(context.Background(), "203.0.113.10"); got != "203.0.113.10" {
+		t.Fatalf("literal public IP = %q", got)
+	}
+	if got := detectPublicServerIP(context.Background(), "127.0.0.1"); got != "" {
+		t.Fatalf("literal private IP = %q", got)
+	}
+}
+
+func TestWriteRuntimeBackupEnv(t *testing.T) {
+	t.Setenv("LANQIN_PUBLIC_HOSTNAME", "mail.example.com")
+	t.Setenv("LANQIN_TEST_QUOTED", "value'with\\slashes\nand-newline")
+	t.Setenv("LANQIN_BACKUP_DIR", "/backups")
+	t.Setenv("LANQIN_UPDATE_SERVICE_URL", "http://updater:8080/v1/update")
+	t.Setenv("UNRELATED_SECRET", "must-not-be-backed-up")
+	path := filepath.Join(t.TempDir(), ".env")
+	if err := writeRuntimeBackupEnv(path); err != nil {
+		t.Fatal(err)
+	}
+	raw, err := os.ReadFile(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	contents := string(raw)
+	for _, expected := range []string{"LANQIN_PUBLIC_HOSTNAME='mail.example.com'", `LANQIN_TEST_QUOTED='value\'with\\slashes\nand-newline'`} {
+		if !strings.Contains(contents, expected) {
+			t.Errorf("backup environment missing %q: %s", expected, contents)
+		}
+	}
+	for _, excluded := range []string{"UNRELATED_SECRET", "must-not-be-backed-up", "LANQIN_BACKUP_DIR", "LANQIN_UPDATE_SERVICE_URL", "http://updater:8080"} {
+		if strings.Contains(contents, excluded) {
+			t.Fatalf("backup environment included excluded value %q", excluded)
+		}
+	}
+	info, err := os.Stat(path)
+	if err != nil || info.Mode().Perm() != 0o600 {
+		t.Fatalf("backup environment permissions = %v, %v", info.Mode().Perm(), err)
+	}
+}
+
+func TestBackupAssetsAvailableWithBundledCompose(t *testing.T) {
+	dir := t.TempDir()
+	compose := filepath.Join(dir, "deploy", "docker-compose.yml")
+	if err := os.MkdirAll(filepath.Dir(compose), 0o700); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(compose, []byte("services: {}\n"), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	a := newTestAppWithConfig(t, Config{
+		Addr: ":0", DBPath: filepath.Join(dir, "data", "lanqin.db"), DataDir: filepath.Join(dir, "data"),
+		CookieName: "lanqin_test", SessionTTLHours: 24, AdminEmail: "admin@example.com", AdminPassword: "ChangeMe123!",
+		AllowInsecureHTTP: true, BackupSourceDir: filepath.Dir(compose), BackupDir: filepath.Join(dir, "data", "disaster-backups"),
+	})
+	stopTestWorkers(a)
+	if !a.backupAssetsAvailable() {
+		t.Fatal("bundled compose did not enable complete backups")
+	}
+	if err := os.Remove(compose); err != nil {
+		t.Fatal(err)
+	}
+	if a.backupAssetsAvailable() {
+		t.Fatal("missing bundled compose incorrectly enabled complete backups")
+	}
+}
+
+func TestBackupPasswordEncryptionAndTelegramReport(t *testing.T) {
+	dir := t.TempDir()
+	a := newTestAppWithConfig(t, Config{
+		Addr: ":0", AppVersion: "v1.2.31", DBPath: filepath.Join(dir, "data", "lanqin.db"), DataDir: filepath.Join(dir, "data"),
+		CookieName: "lanqin_test", SessionTTLHours: 24, AdminEmail: "admin@newszxcn.com", AdminPassword: "ChangeMe123!",
+		PublicHostname: "mail.newszxcn.com", PublicBaseURL: "https://mail.newszxcn.com", AllowInsecureHTTP: true, UpdateServiceToken: "test-update-secret",
+	})
+
+	ciphertext, err := a.encryptBackupPassword("BackupPassword123!")
+	if err != nil || ciphertext == "BackupPassword123!" {
+		t.Fatalf("password encryption failed: %q %v", ciphertext, err)
+	}
+	plain, err := a.decryptBackupPassword(ciphertext)
+	if err != nil || plain != "BackupPassword123!" {
+		t.Fatalf("password decryption = %q, %v", plain, err)
+	}
+	if !validTelegramPrivateChatID("-1001234567890") {
+		t.Fatal("private Telegram group chat ID was rejected")
+	}
+
+	now := a.now().UTC().Format("2006-01-02T15:04:05Z")
+	if _, err := a.db.Exec(`INSERT INTO domains(id,name,status,dkim_selector,dkim_public_key,dkim_private_key,dns_status,created_at,updated_at) VALUES('domain_xyes','xyes.me','active','mail','','','unchecked',?,?)`, now, now); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := a.db.Exec(`INSERT INTO users(id,login_name,email,display_name,role,password_hash,created_at,updated_at) VALUES('user_xyes','user@xyes.me','user@xyes.me','User','user','hash',?,?)`, now, now); err != nil {
+		t.Fatal(err)
+	}
+
+	path := filepath.Join(dir, "newszxcn-backup-20260811-120000-1.2.31.tar.zst.enc")
+	if err := os.WriteFile(path, []byte("encrypted backup"), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	info, err := os.Stat(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	report, err := a.backupTelegramReport(context.Background(), path, info)
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, expected := range []string{"备份成功", "mail.newszxcn.com", "已有域名", "newszxcn.com", "xyes.me", "管理员账号", "admin@newszxcn.com", "普通用户账号", "user@xyes.me", "请不要解压", "本地上传", "1Password"} {
+		if !strings.Contains(report, expected) {
+			t.Errorf("report missing %q: %s", expected, report)
+		}
+	}
+	if strings.Contains(report, "newszxcn.com（管理员）") {
+		t.Fatal("domain list incorrectly contains account role")
+	}
+	if strings.Contains(report, "BackupPassword123!") || strings.Contains(report, "ChangeMe123!") {
+		t.Fatal("report leaked a password")
+	}
+}

apps/api/internal/app/config.go

@@ -67,6 +67,8 @@ type Config struct {
 	ReleaseAPIURL                   string
 	UpdateServiceURL                string
 	UpdateServiceToken              string
+	BackupSourceDir                 string
+	BackupDir                       string
 }
 
 func LoadConfig() Config {
@@ -131,6 +133,8 @@ func LoadConfig() Config {
 		ReleaseAPIURL:                   getenv("LANQIN_RELEASE_API_URL", "https://api.github.com/repos/zxyszx/NewSzxcn-Email/releases/latest"),
 		UpdateServiceURL:                getenv("LANQIN_UPDATE_SERVICE_URL", ""),
 		UpdateServiceToken:              getenv("LANQIN_UPDATE_SERVICE_TOKEN", ""),
+		BackupSourceDir:                 getenv("LANQIN_BACKUP_SOURCE_DIR", "/usr/share/newszxcn-email/deploy"),
+		BackupDir:                       getenv("LANQIN_BACKUP_DIR", filepath.Join(dataDir, "disaster-backups")),
 	}
 }
 

apps/api/internal/app/mail_handlers.go

@@ -87,6 +87,7 @@ func (a *App) handleMyMailboxes(w http.ResponseWriter, r *http.Request) {
 		m.CreatedAt = parseTime(created)
 		items = append(items, m)
 	}
+	markPrimaryMailboxes(items)
 	respondJSON(w, http.StatusOK, map[string]any{"items": items})
 }
 
@@ -2619,14 +2620,15 @@ func (a *App) ensureMailboxQuotaAvailable(ctx context.Context, db dbExecutor, ma
 		return nil
 	}
 	var quotaMB int64
-	if err := rowDB.QueryRowContext(ctx, `SELECT quota_mb FROM mailboxes WHERE id=? AND status='active'`, mailboxID).Scan(&quotaMB); err != nil {
+	var userID string
+	if err := rowDB.QueryRowContext(ctx, `SELECT u.storage_quota_mb,mb.user_id FROM mailboxes mb JOIN users u ON u.id=mb.user_id WHERE mb.id=? AND mb.status='active'`, mailboxID).Scan(&quotaMB, &userID); err != nil {
 		return err
 	}
 	if quotaMB <= 0 {
 		return nil
 	}
 	var used int64
-	if err := rowDB.QueryRowContext(ctx, `SELECT COALESCE(SUM(size_bytes),0) FROM messages WHERE mailbox_id=?`, mailboxID).Scan(&used); err != nil {
+	if err := rowDB.QueryRowContext(ctx, `SELECT COALESCE(SUM(m.size_bytes),0) FROM messages m JOIN mailboxes mb ON mb.id=m.mailbox_id WHERE mb.user_id=?`, userID).Scan(&used); err != nil {
 		return err
 	}
 	quotaBytes := quotaMB * 1024 * 1024

apps/api/internal/app/mail_translate.go

@@ -10,6 +10,7 @@ import (
 	"net/http"
 	"net/url"
 	"strings"
+	"sync"
 	"time"
 	"unicode/utf8"
 
@@ -64,16 +65,22 @@ func (a *App) handleTranslateMailMessage(w http.ResponseWriter, r *http.Request)
 		maxChars = 8000
 	}
 	text, truncated := truncateRunes(text, maxChars)
+	translatedHTMLResult := make(chan string, 1)
+	if strings.TrimSpace(msg.BodyHTML) != "" {
+		go func() {
+			translatedHTML, _ := translateHTMLTextNodes(r.Context(), a.policy, msg.BodyHTML, target, maxChars)
+			translatedHTMLResult <- translatedHTML
+		}()
+	} else {
+		translatedHTMLResult <- ""
+	}
 	translated, source, err := googleFreeTranslate(r.Context(), text, target)
 	if err != nil {
 		a.log.Warn("mail translation failed", "message_id", msg.ID, "target", target, "error", err)
 		respondError(w, http.StatusBadGateway, "translation failed")
 		return
 	}
-	translatedHTML := ""
-	if strings.TrimSpace(msg.BodyHTML) != "" {
-		translatedHTML, _ = translateHTMLTextNodes(r.Context(), a.policy, msg.BodyHTML, target, maxChars)
-	}
+	translatedHTML := <-translatedHTMLResult
 	respondJSON(w, http.StatusOK, translateMailMessageResponse{TranslatedText: translated, TranslatedHTML: translatedHTML, SourceLanguage: source, TargetLanguage: target, Truncated: truncated})
 }
 
@@ -131,53 +138,97 @@ func (a *App) handleTranslateExternalIMAPMessage(w http.ResponseWriter, r *http.
 		maxChars = 8000
 	}
 	text, truncated := truncateRunes(text, maxChars)
+	translatedHTMLResult := make(chan string, 1)
+	if err == nil && strings.TrimSpace(stored.BodyHTML) != "" {
+		go func() {
+			translatedHTML, _ := translateHTMLTextNodes(r.Context(), a.policy, stored.BodyHTML, target, maxChars)
+			translatedHTMLResult <- translatedHTML
+		}()
+	} else {
+		translatedHTMLResult <- ""
+	}
 	translated, source, err := googleFreeTranslate(r.Context(), text, target)
 	if err != nil {
 		a.log.Warn("external mail translation failed", "account_id", account.ID, "remote_id", chi.URLParam(r, "remoteId"), "target", target, "error", err)
 		respondError(w, http.StatusBadGateway, "translation failed")
 		return
 	}
-	translatedHTML := ""
-	if err == nil && strings.TrimSpace(stored.BodyHTML) != "" {
-		translatedHTML, _ = translateHTMLTextNodes(r.Context(), a.policy, stored.BodyHTML, target, maxChars)
-	}
+	translatedHTML := <-translatedHTMLResult
 	respondJSON(w, http.StatusOK, translateMailMessageResponse{TranslatedText: translated, TranslatedHTML: translatedHTML, SourceLanguage: source, TargetLanguage: target, Truncated: truncated})
 }
 
 func translateHTMLTextNodes(ctx context.Context, policy *HTMLPolicy, bodyHTML, target string, maxChars int) (string, error) {
+	return translateHTMLTextNodesWith(ctx, policy, bodyHTML, target, maxChars, googleFreeTranslate)
+}
+
+type htmlTextTranslator func(context.Context, string, string) (string, string, error)
+
+func translateHTMLTextNodesWith(ctx context.Context, policy *HTMLPolicy, bodyHTML, target string, maxChars int, translator htmlTextTranslator) (string, error) {
 	nodes, err := html.ParseFragment(strings.NewReader(bodyHTML), nil)
 	if err != nil {
 		return "", err
 	}
+	type translationJob struct {
+		node     *html.Node
+		original string
+		text     string
+	}
 	remaining := maxChars
-	var translateNode func(*html.Node) error
-	translateNode = func(n *html.Node) error {
+	jobs := make([]translationJob, 0)
+	var collect func(*html.Node)
+	collect = func(n *html.Node) {
 		if n.Type == html.ElementNode && shouldSkipHTMLTranslationElement(n.Data) {
-			return nil
+			return
 		}
 		if n.Type == html.TextNode {
 			text := strings.TrimSpace(n.Data)
 			if text != "" && containsTranslatableLetter(text) && remaining > 0 {
 				limited, _ := truncateRunes(text, remaining)
 				remaining -= utf8.RuneCountInString(limited)
-				translated, _, err := googleFreeTranslate(ctx, limited, target)
-				if err != nil {
-					return err
-				}
-				n.Data = strings.Replace(n.Data, text, translated, 1)
+				jobs = append(jobs, translationJob{node: n, original: text, text: limited})
 			}
 		}
 		for c := n.FirstChild; c != nil; c = c.NextSibling {
-			if err := translateNode(c); err != nil {
-				return err
-			}
+			collect(c)
 		}
-		return nil
 	}
 	for _, n := range nodes {
-		if err := translateNode(n); err != nil {
-			return "", err
-		}
+		collect(n)
+	}
+	results := make([]string, len(jobs))
+	jobIndexes := make(chan int)
+	errCh := make(chan error, 1)
+	workers := min(4, len(jobs))
+	var wg sync.WaitGroup
+	for range workers {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			for index := range jobIndexes {
+				translated, _, translateErr := translator(ctx, jobs[index].text, target)
+				if translateErr != nil {
+					select {
+					case errCh <- translateErr:
+					default:
+					}
+					continue
+				}
+				results[index] = translated
+			}
+		}()
+	}
+	for index := range jobs {
+		jobIndexes <- index
+	}
+	close(jobIndexes)
+	wg.Wait()
+	select {
+	case translateErr := <-errCh:
+		return "", translateErr
+	default:
+	}
+	for index, job := range jobs {
+		job.node.Data = strings.Replace(job.node.Data, job.original, results[index], 1)
 	}
 	var b bytes.Buffer
 	for _, n := range nodes {

apps/api/internal/app/mail_translate_test.go

@@ -1,6 +1,10 @@
 package app
 
-import "testing"
+import (
+	"context"
+	"strings"
+	"testing"
+)
 
 func TestParseGoogleTranslateResponse(t *testing.T) {
 	raw := []any{
@@ -20,6 +24,22 @@ func TestParseGoogleTranslateResponse(t *testing.T) {
 	}
 }
 
+func TestTranslateHTMLTextNodesWithPreservesMarkupAndSkipsCode(t *testing.T) {
+	translator := func(_ context.Context, text, target string) (string, string, error) {
+		return strings.ToUpper(text) + "-" + target, "en", nil
+	}
+	got, err := translateHTMLTextNodesWith(context.Background(), nil, `<p>Hello <strong>world</strong></p><pre>keep me</pre>`, "zh-CN", 100, translator)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !strings.Contains(got, `<p>HELLO-zh-CN <strong>WORLD-zh-CN</strong></p>`) {
+		t.Fatalf("translated HTML = %q", got)
+	}
+	if !strings.Contains(got, `<pre>keep me</pre>`) {
+		t.Fatalf("code block was translated: %q", got)
+	}
+}
+
 func TestTruncateRunes(t *testing.T) {
 	got, truncated := truncateRunes("你好world", 4)
 	if got != "你好wo" || !truncated {

apps/api/internal/app/mailbox_delete_test.go

@@ -6,7 +6,7 @@ import (
 	"testing"
 )
 
-func TestAdminCanDeleteOwnLastMailboxWithoutDeletingAccount(t *testing.T) {
+func TestAdminCannotDeleteOwnPrimaryMailbox(t *testing.T) {
 	a := newTestApp(t)
 	ts := httptest.NewServer(a.Router())
 	defer ts.Close()
@@ -21,10 +21,13 @@ func TestAdminCanDeleteOwnLastMailboxWithoutDeletingAccount(t *testing.T) {
 	if code := admin.do("GET", "/api/mail/mailboxes", nil, &mailboxes); code != http.StatusOK || len(mailboxes.Items) != 1 {
 		t.Fatalf("mailboxes code=%d items=%d", code, len(mailboxes.Items))
 	}
-	if code := admin.do("DELETE", "/api/admin/mailboxes/"+mailboxes.Items[0].ID, nil, &map[string]any{}); code != http.StatusOK {
-		t.Fatalf("delete final mailbox code=%d", code)
+	if !mailboxes.Items[0].Primary {
+		t.Fatal("administrator mailbox should be marked as primary")
 	}
-	if code := admin.do("GET", "/api/mail/mailboxes", nil, &mailboxes); code != http.StatusOK || len(mailboxes.Items) != 0 {
+	if code := admin.do("DELETE", "/api/admin/mailboxes/"+mailboxes.Items[0].ID, nil, &map[string]any{}); code != http.StatusBadRequest {
+		t.Fatalf("delete primary mailbox code=%d", code)
+	}
+	if code := admin.do("GET", "/api/mail/mailboxes", nil, &mailboxes); code != http.StatusOK || len(mailboxes.Items) != 1 {
 		t.Fatalf("mailboxes after delete code=%d items=%d", code, len(mailboxes.Items))
 	}
 	var me map[string]any

apps/api/internal/app/open_api_handlers.go

@@ -200,6 +200,10 @@ func (a *App) handleOpenAPICreateMailbox(w http.ResponseWriter, r *http.Request)
 		badRequest(w, errors.New("password must be at least 6 characters"))
 		return
 	}
+	if req.QuotaMB < 0 {
+		badRequest(w, errors.New("quotaMb must be zero or greater"))
+		return
+	}
 	domain, err := a.domainByID(r.Context(), req.DomainID)
 	if err != nil {
 		respondError(w, http.StatusNotFound, "domain not found")
@@ -231,7 +235,20 @@ func (a *App) handleOpenAPICreateMailbox(w http.ResponseWriter, r *http.Request)
 		respondMailboxOwnerError(w, err)
 		return
 	}
-	mailboxID, err := a.createMailboxWithPasswordHashTx(r.Context(), tx, userID, req.DomainID, localPart, displayName, string(passwordHash), req.QuotaMB, "active")
+	var ownerPasswordHash, ownerRole string
+	var ownerStorageQuotaMB int
+	if err := tx.QueryRowContext(r.Context(), `SELECT password_hash,role,storage_quota_mb FROM users WHERE id=?`, userID).Scan(&ownerPasswordHash, &ownerRole, &ownerStorageQuotaMB); err != nil {
+		respondError(w, http.StatusInternalServerError, "failed to load owner user")
+		return
+	}
+	quotaMB := req.QuotaMB
+	if quotaMB == 0 {
+		quotaMB = ownerStorageQuotaMB
+	}
+	if ownerRole == "admin" {
+		quotaMB = 0
+	}
+	mailboxID, err := a.createMailboxWithPasswordHashTx(r.Context(), tx, userID, req.DomainID, localPart, displayName, ownerPasswordHash, quotaMB, "active")
 	if err != nil {
 		badRequest(w, err)
 		return
@@ -279,7 +296,11 @@ func (a *App) handleOpenAPIUpdateMailbox(w http.ResponseWriter, r *http.Request)
 		displayName = current.DisplayName
 	}
 	quotaMB := req.QuotaMB
-	if quotaMB <= 0 {
+	if quotaMB < 0 {
+		badRequest(w, errors.New("quotaMb must be zero or greater"))
+		return
+	}
+	if quotaMB == 0 {
 		quotaMB = current.QuotaMB
 	}
 	status := strings.TrimSpace(req.Status)
@@ -294,12 +315,28 @@ func (a *App) handleOpenAPIUpdateMailbox(w http.ResponseWriter, r *http.Request)
 	if userID == "" {
 		userID = current.UserID
 	}
+	if current.Primary && userID != current.UserID {
+		badRequest(w, errors.New("用户默认邮箱归属由所属账号管理，不能单独修改"))
+		return
+	}
+	if current.Primary && status != current.Status {
+		badRequest(w, errors.New("用户默认邮箱状态由所属账号管理，不能单独修改"))
+		return
+	}
 	if err := a.ensureActiveUserExists(r.Context(), userID); err != nil {
 		respondMailboxOwnerError(w, err)
 		return
 	}
-	res, err := a.db.ExecContext(r.Context(), `UPDATE mailboxes SET user_id=?,display_name=?,quota_mb=?,status=?,updated_at=? WHERE id=?`,
-		userID, displayName, quotaMB, status, a.now().UTC().Format(time.RFC3339Nano), id)
+	var ownerRole, ownerPasswordHash string
+	if err := a.db.QueryRowContext(r.Context(), `SELECT role,password_hash FROM users WHERE id=?`, userID).Scan(&ownerRole, &ownerPasswordHash); err != nil {
+		respondError(w, http.StatusInternalServerError, "failed to load owner user")
+		return
+	}
+	if ownerRole == "admin" {
+		quotaMB = 0
+	}
+	res, err := a.db.ExecContext(r.Context(), `UPDATE mailboxes SET user_id=?,display_name=?,password_hash=?,quota_mb=?,status=?,updated_at=? WHERE id=?`,
+		userID, displayName, ownerPasswordHash, quotaMB, status, a.now().UTC().Format(time.RFC3339Nano), id)
 	if err != nil {
 		respondError(w, http.StatusInternalServerError, "failed to update mailbox")
 		return
@@ -318,6 +355,14 @@ func (a *App) handleOpenAPIUpdateMailbox(w http.ResponseWriter, r *http.Request)
 
 func (a *App) handleOpenAPIDeleteMailbox(w http.ResponseWriter, r *http.Request) {
 	id := chi.URLParam(r, "id")
+	if err := a.ensureMailboxDeletable(r.Context(), id); err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			respondError(w, http.StatusNotFound, "邮箱不存在或已被删除")
+		} else {
+			badRequest(w, err)
+		}
+		return
+	}
 	rows, err := a.db.QueryContext(r.Context(), `SELECT id FROM messages WHERE mailbox_id=?`, id)
 	if err != nil {
 		respondError(w, http.StatusInternalServerError, "加载邮箱邮件失败")
@@ -821,8 +866,8 @@ func (a *App) resolveMailboxOwnerTx(ctx context.Context, tx *sql.Tx, userID, own
 	if displayName == "" {
 		displayName = email
 	}
-	_, err = tx.ExecContext(ctx, `INSERT INTO users(id,login_name,email,display_name,role,password_hash,disabled,created_at,updated_at)
-		VALUES(?,?,?,?,?,?,?,?,?)`, userID, email, email, displayName, "user", passwordHash, 0, now, now)
+	_, err = tx.ExecContext(ctx, `INSERT INTO users(id,login_name,email,display_name,role,password_hash,disabled,storage_quota_mb,created_at,updated_at)
+		VALUES(?,?,?,?,?,?,?,?,?,?)`, userID, email, email, displayName, "user", passwordHash, 0, defaultUserStorageQuotaMB, now, now)
 	return userID, err
 }
 

apps/api/internal/app/permission_group_handlers.go

@@ -142,11 +142,12 @@ func (a *App) handleCreatePermissionGroup(w http.ResponseWriter, r *http.Request
 func (a *App) handleUpdatePermissionGroup(w http.ResponseWriter, r *http.Request) {
 	id := chi.URLParam(r, "id")
 	var existingSystem int
-	if err := a.db.QueryRowContext(r.Context(), `SELECT system FROM permission_groups WHERE id=?`, id).Scan(&existingSystem); err != nil {
+	var existingName, existingDescription string
+	if err := a.db.QueryRowContext(r.Context(), `SELECT system,name,description FROM permission_groups WHERE id=?`, id).Scan(&existingSystem, &existingName, &existingDescription); err != nil {
 		respondError(w, http.StatusNotFound, "permission group not found")
 		return
 	}
-	if intBool(existingSystem) {
+	if intBool(existingSystem) && id != PermissionGroupRegular {
 		respondError(w, http.StatusForbidden, "system permission groups cannot be edited")
 		return
 	}
@@ -161,6 +162,10 @@ func (a *App) handleUpdatePermissionGroup(w http.ResponseWriter, r *http.Request
 		return
 	}
 	name := strings.TrimSpace(req.Name)
+	if id == PermissionGroupRegular {
+		name = existingName
+		req.Description = existingDescription
+	}
 	if name == "" {
 		badRequest(w, errors.New("name is required"))
 		return

apps/api/internal/app/personal_handlers.go

@@ -111,7 +111,11 @@ func (a *App) handleApplyMailbox(w http.ResponseWriter, r *http.Request) {
 		badRequest(w, errors.New("displayName must be at most 80 characters"))
 		return
 	}
-	mailboxID, err := a.createMailboxWithPasswordHash(r.Context(), user.ID, domainID, localPart, displayName, passwordHash, 1024, "active")
+	quotaMB := defaultUserStorageQuotaMB
+	if user.Role == "admin" {
+		quotaMB = 0
+	}
+	mailboxID, err := a.createMailboxWithPasswordHash(r.Context(), user.ID, domainID, localPart, displayName, passwordHash, quotaMB, "active")
 	if err != nil {
 		if strings.Contains(strings.ToLower(err.Error()), "unique") {
 			respondError(w, http.StatusConflict, "该邮箱地址已被占用")
@@ -900,26 +904,14 @@ func (a *App) handleMailStats(w http.ResponseWriter, r *http.Request) {
 		respondError(w, http.StatusInternalServerError, "failed to load send queue stats")
 		return
 	}
-	if mailboxID != "" && !isAllMailboxID(mailboxID) {
-		var quotaMB int64
-		if err := a.db.QueryRowContext(r.Context(), `SELECT quota_mb FROM mailboxes WHERE id=? AND user_id=?`, mailboxID, user.ID).Scan(&quotaMB); err != nil {
-			respondError(w, http.StatusInternalServerError, "failed to load quota")
-			return
-		}
-		stats.QuotaBytes = quotaMB * 1024 * 1024
-		if stats.QuotaBytes > 0 {
-			stats.QuotaUsedPct = float64(stats.StorageBytes) / float64(stats.QuotaBytes) * 100
-		}
-	} else {
-		var quotaMB int64
-		if err := a.db.QueryRowContext(r.Context(), `SELECT COALESCE(SUM(mb.quota_mb),0) FROM mailboxes mb WHERE `+where, args...).Scan(&quotaMB); err != nil {
-			respondError(w, http.StatusInternalServerError, "failed to load quota")
-			return
-		}
-		stats.QuotaBytes = quotaMB * 1024 * 1024
-		if stats.QuotaBytes > 0 {
-			stats.QuotaUsedPct = float64(stats.StorageBytes) / float64(stats.QuotaBytes) * 100
-		}
+	var quotaMB int64
+	if err := a.db.QueryRowContext(r.Context(), `SELECT storage_quota_mb FROM users WHERE id=?`, user.ID).Scan(&quotaMB); err != nil {
+		respondError(w, http.StatusInternalServerError, "failed to load quota")
+		return
+	}
+	stats.QuotaBytes = quotaMB * 1024 * 1024
+	if stats.QuotaBytes > 0 {
+		stats.QuotaUsedPct = float64(stats.StorageBytes) / float64(stats.QuotaBytes) * 100
 	}
 	rows, err := a.db.QueryContext(r.Context(), `SELECT f.name,f.role,COUNT(m.id),COALESCE(SUM(CASE WHEN m.is_read=0 THEN 1 ELSE 0 END),0),COALESCE(SUM(m.size_bytes),0)
 		FROM mailboxes mb JOIN folders f ON f.mailbox_id=mb.id LEFT JOIN messages m ON m.folder_id=f.id

apps/api/internal/app/router_auth.go

@@ -139,6 +139,20 @@ func (a *App) Router() http.Handler {
 			r.Use(a.requireAdminAccess)
 			r.Get("/admin/system/version", a.handleSystemVersion)
 			r.Post("/admin/system/update", a.handleSystemUpdate)
+			r.Get("/admin/backups", a.handleListBackups)
+			r.Post("/admin/backups/settings", a.handleUpdateBackupSettings)
+			r.Post("/admin/backups/password", a.handleUpdateBackupPassword)
+			r.Post("/admin/backups/telegram/test", a.handleTestBackupTelegram)
+			r.Post("/admin/backups/telegram/discover-group", a.handleDiscoverBackupTelegramGroup)
+			r.Post("/admin/backups/google-drive/connect", a.handleGoogleDriveConnect)
+			r.Get("/admin/backups/google-drive/callback", a.handleGoogleDriveCallback)
+			r.Delete("/admin/backups/google-drive", a.handleGoogleDriveDisconnect)
+			r.Post("/admin/backups", a.handleCreateBackup)
+			r.Get("/admin/backups/{name}/download", a.handleDownloadBackup)
+			r.Post("/admin/backups/{name}/verify", a.handleVerifyBackup)
+			r.Post("/admin/backups/{name}/telegram", a.handleSendBackupTelegram)
+			r.Post("/admin/backups/{name}/google-drive", a.handleSendBackupGoogleDrive)
+			r.Delete("/admin/backups/{name}", a.handleDeleteBackup)
 			r.With(a.requirePermission(PermissionAdminOverview)).Get("/admin/overview", a.handleAdminOverview)
 			r.With(a.requireAnyPermission(PermissionUsersView, PermissionMailboxesView)).Get("/admin/users", a.handleListUsers)
 			r.With(a.requirePermission(PermissionUsersCreate)).Post("/admin/users", a.handleCreateUser)

apps/api/internal/app/telegram.go

@@ -71,6 +71,7 @@ type telegramUpdate struct {
 		Chat struct {
 			ID        int64  `json:"id"`
 			Type      string `json:"type"`
+			Title     string `json:"title"`
 			FirstName string `json:"first_name"`
 			LastName  string `json:"last_name"`
 			Username  string `json:"username"`
@@ -112,7 +113,7 @@ func normalizeTelegramBodyMode(value string) string {
 
 func validTelegramPrivateChatID(value string) bool {
 	id, err := strconv.ParseInt(strings.TrimSpace(value), 10, 64)
-	return err == nil && id > 0
+	return err == nil && id != 0
 }
 
 func (a *App) handleCreateTelegramPairing(w http.ResponseWriter, r *http.Request) {
@@ -259,6 +260,50 @@ func (a *App) discoverTelegramPrivateChat(ctx context.Context, token, pairingCod
 	return "", "", errors.New("未找到匹配的私聊，请打开机器人发送绑定码后重试")
 }
 
+type telegramDiscoveredChat struct {
+	ChatID      string `json:"chatId"`
+	DisplayName string `json:"displayName"`
+}
+
+func (a *App) discoverTelegramGroups(ctx context.Context, token, pairingCode string) ([]telegramDiscoveredChat, error) {
+	var updates []telegramUpdate
+	if err := a.callTelegram(ctx, token, "getUpdates", map[string]any{
+		"limit": 100, "timeout": 0, "allowed_updates": []string{"message"},
+	}, &updates); err != nil {
+		return nil, err
+	}
+	found := make([]telegramDiscoveredChat, 0)
+	seen := make(map[int64]bool)
+	for i := len(updates) - 1; i >= 0; i-- {
+		message := updates[i].Message
+		if message == nil || (message.Chat.Type != "group" && message.Chat.Type != "supergroup") || message.Chat.ID >= 0 {
+			continue
+		}
+		text := strings.TrimSpace(message.Text)
+		fields := strings.Fields(text)
+		matches := strings.EqualFold(text, pairingCode)
+		if len(fields) == 2 && strings.HasPrefix(strings.ToLower(fields[0]), "/newszxcn") {
+			matches = strings.EqualFold(fields[1], pairingCode)
+		}
+		if !matches {
+			continue
+		}
+		if seen[message.Chat.ID] {
+			continue
+		}
+		seen[message.Chat.ID] = true
+		name := strings.TrimSpace(message.Chat.Title)
+		if name == "" {
+			name = "Telegram 群组"
+		}
+		found = append(found, telegramDiscoveredChat{ChatID: strconv.FormatInt(message.Chat.ID, 10), DisplayName: name})
+	}
+	if len(found) == 0 {
+		return nil, errors.New("未找到匹配的群组，请确认机器人已加入群组，并在群里发送查询命令")
+	}
+	return found, nil
+}
+
 func newTelegramPairingCode() (string, error) {
 	raw := make([]byte, 6)
 	if _, err := rand.Read(raw); err != nil {

apps/api/internal/app/types.go

@@ -21,8 +21,9 @@ type User struct {
 
 type AdminUser struct {
 	User
-	MailboxCount int      `json:"mailboxCount"`
-	Mailboxes    []string `json:"mailboxes"`
+	MailboxCount   int      `json:"mailboxCount"`
+	Mailboxes      []string `json:"mailboxes"`
+	StorageQuotaMB int      `json:"storageQuotaMb"`
 }
 
 type APIToken struct {
@@ -71,6 +72,7 @@ type Mailbox struct {
 	DisplayName string    `json:"displayName"`
 	QuotaMB     int       `json:"quotaMb"`
 	Status      string    `json:"status"`
+	Primary     bool      `json:"primary"`
 	UnreadCount int       `json:"unreadCount"`
 	CreatedAt   time.Time `json:"createdAt"`
 }

apps/web/src/components/protected-layout.tsx

@@ -1,11 +1,10 @@
 import * as React from "react"
 import { Outlet, Link, useLocation } from "react-router-dom"
-import { BarChart3, ClipboardList, Forward, Globe2, Inbox, LogOut, Mail, Mailbox, Settings, ShieldCheck, UserCog } from "lucide-react"
+import { ArchiveRestore, BarChart3, ClipboardList, Forward, Globe2, Inbox, LogOut, Mail, Mailbox, Settings, ShieldCheck, UserCog } from "lucide-react"
 import { useMe } from "@/hooks/use-me"
 import { useLogout } from "@/hooks/use-logout"
 import { AuthGuard } from "@/components/auth-guard"
 import { Button } from "@/components/ui/button"
-import { Badge } from "@/components/ui/badge"
 import { Avatar, AvatarFallback } from "@/components/ui/avatar"
 import { SystemVersionDialog } from "@/components/system-version-dialog"
 import { hasAnyPermission } from "@/lib/permissions"
@@ -36,6 +35,7 @@ const adminSections: { key: string; label: string; icon: React.ReactNode; permis
   { key: "aliases", label: "邮件转发", icon: <Forward />, permissions: ["admin.aliases.view"] },
   { key: "messages", label: "全部邮件", icon: <Inbox />, permissions: ["admin.messages.view"] },
   { key: "sendAudit", label: "发送队列", icon: <ClipboardList />, permissions: ["admin.messages.view"] },
+  { key: "backups", label: "备份与恢复", icon: <ArchiveRestore />, permissions: ["admin.settings.view"] },
   { key: "settings", label: "系统设置", icon: <Settings />, permissions: ["admin.settings.view", "admin.templates.view"] },
 ]
 
@@ -57,7 +57,7 @@ function ProtectedContent() {
   const isProfileRoute = location.pathname.startsWith("/profile")
   const isAdminRoute = location.pathname.startsWith("/admin")
   const adminSection = new URLSearchParams(location.search).get("section") || "overview"
-  const visibleAdminSections = adminSections.filter((item) => hasAnyPermission(user, item.permissions))
+  const visibleAdminSections = adminSections.filter((item) => hasAnyPermission(user, item.permissions) && (item.key !== "backups" || user.role === "admin"))
 
   if (isMailRoute || isProfileRoute) {
     return <Outlet />
@@ -110,9 +110,6 @@ function ProtectedContent() {
                     <span className="truncate font-semibold">{user.displayName}</span>
                     <span className="truncate text-xs text-muted-foreground">{user.email}</span>
                   </div>
-                  <Badge variant={user.role === "admin" ? "default" : "secondary"} className="ml-auto text-[10px]">
-                    {user.role === "admin" ? "管理员" : "普通用户"}
-                  </Badge>
                 </Link>
               </SidebarMenuButton>
             </SidebarMenuItem>

apps/web/src/components/ui/button.tsx

@@ -10,7 +10,7 @@ const buttonVariants = cva(
     variants: {
       variant: {
         default:
-          "bg-primary text-primary-foreground hover:bg-primary/90",
+          "bg-[hsl(var(--action-primary))] text-[hsl(var(--action-primary-foreground))] hover:bg-[hsl(var(--action-primary)/0.9)]",
         destructive:
           "bg-destructive text-destructive-foreground hover:bg-destructive/90",
         outline:

apps/web/src/components/ui/card.tsx

@@ -8,6 +8,7 @@ const Card = React.forwardRef<
 >(({ className, ...props }, ref) => (
   <div
     ref={ref}
+    data-slot="card"
     className={cn(
       "rounded-lg border bg-card text-card-foreground shadow-sm",
       className
@@ -23,6 +24,7 @@ const CardHeader = React.forwardRef<
 >(({ className, ...props }, ref) => (
   <div
     ref={ref}
+    data-slot="card-header"
     className={cn("flex flex-col space-y-1.5 p-6", className)}
     {...props}
   />
@@ -35,6 +37,7 @@ const CardTitle = React.forwardRef<
 >(({ className, ...props }, ref) => (
   <div
     ref={ref}
+    data-slot="card-title"
     className={cn("font-semibold leading-none tracking-tight", className)}
     {...props}
   />
@@ -57,7 +60,7 @@ const CardContent = React.forwardRef<
   HTMLDivElement,
   React.HTMLAttributes<HTMLDivElement>
 >(({ className, ...props }, ref) => (
-  <div ref={ref} className={cn("p-6 pt-0", className)} {...props} />
+  <div ref={ref} data-slot="card-content" className={cn("p-6 pt-0", className)} {...props} />
 ))
 CardContent.displayName = "CardContent"
 

apps/web/src/components/ui/dialog.tsx

@@ -19,7 +19,7 @@ const DialogOverlay = React.forwardRef<
   <DialogPrimitive.Overlay
     ref={ref}
     className={cn(
-      "fixed inset-0 z-50 bg-black/80  data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0",
+      "fixed inset-0 z-50 bg-black/35 data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 sm:bg-black/45",
       className
     )}
     {...props}

apps/web/src/components/ui/table.tsx

@@ -20,7 +20,7 @@ const TableHeader = React.forwardRef<
   HTMLTableSectionElement,
   React.HTMLAttributes<HTMLTableSectionElement>
 >(({ className, ...props }, ref) => (
-  <thead ref={ref} className={cn("[&_tr]:border-b", className)} {...props} />
+  <thead ref={ref} data-slot="table-header" className={cn("[&_tr]:border-b", className)} {...props} />
 ))
 TableHeader.displayName = "TableHeader"
 
@@ -57,6 +57,7 @@ const TableRow = React.forwardRef<
 >(({ className, ...props }, ref) => (
   <tr
     ref={ref}
+    data-slot="table-row"
     className={cn(
       "border-b transition-colors hover:bg-muted/50 data-[state=selected]:bg-muted",
       className
@@ -72,6 +73,7 @@ const TableHead = React.forwardRef<
 >(({ className, ...props }, ref) => (
   <th
     ref={ref}
+    data-slot="table-head"
     className={cn(
       "h-10 px-2 text-left align-middle font-medium text-muted-foreground [&:has([role=checkbox])]:pr-0 [&>[role=checkbox]]:translate-y-[2px]",
       className
@@ -87,6 +89,7 @@ const TableCell = React.forwardRef<
 >(({ className, ...props }, ref) => (
   <td
     ref={ref}
+    data-slot="table-cell"
     className={cn(
       "p-2 align-middle [&:has([role=checkbox])]:pr-0 [&>[role=checkbox]]:translate-y-[2px]",
       className

apps/web/src/index.css

@@ -12,10 +12,12 @@
     --popover-foreground: 0 0% 9%;
     --primary: 0 0% 12%;
     --primary-foreground: 0 0% 98%;
+    --action-primary: 0 0% 12%;
+    --action-primary-foreground: 0 0% 98%;
     --secondary: 0 0% 96.1%;
     --secondary-foreground: 0 0% 12%;
     --muted: 0 0% 96.1%;
-    --muted-foreground: 0 0% 42%;
+    --muted-foreground: 0 0% 36%;
     --accent: 0 0% 95%;
     --accent-foreground: 0 0% 12%;
     --destructive: 358 88% 61%;
@@ -33,6 +35,8 @@
     --sidebar-accent-foreground: 0 0% 12%;
     --sidebar-border: 0 0% 89.8%;
     --sidebar-ring: 0 0% 42%;
+    --compose-send: 217 89% 43%;
+    --compose-send-hover: 216 94% 32%;
   }
 
   * { @apply border-border; }
@@ -61,10 +65,12 @@
     --popover-foreground: 0 0% 98%;
     --primary: 0 0% 98%;
     --primary-foreground: 240 5.9% 10%;
+    --action-primary: 240 4% 24%;
+    --action-primary-foreground: 0 0% 98%;
     --secondary: 240 3.7% 15.9%;
     --secondary-foreground: 0 0% 98%;
     --muted: 240 3.7% 15.9%;
-    --muted-foreground: 240 5% 64.9%;
+    --muted-foreground: 240 5% 72%;
     --accent: 240 3.7% 15.9%;
     --accent-foreground: 0 0% 98%;
     --destructive: 0 62.8% 30.6%;
@@ -80,10 +86,22 @@
     --sidebar-accent-foreground: 240 4.8% 95.9%;
     --sidebar-border: 240 3.7% 15.9%;
     --sidebar-ring: 217.2 91.2% 59.8%;
+    --compose-send: 217 89% 52%;
+    --compose-send-hover: 214 94% 60%;
   }
 }
 
 @layer components {
+  .compose-send-button.compose-send-button {
+    background: hsl(var(--compose-send));
+    color: white;
+  }
+
+  .compose-send-button.compose-send-button:hover {
+    background: hsl(var(--compose-send-hover));
+    color: white;
+  }
+
   .mail-shell-grid {
     display: grid;
     grid-template-columns: var(--app-sidebar-width, 18rem) minmax(0, 1fr);
@@ -140,12 +158,50 @@
   }
 
   [data-sidebar="menu-button"][data-active="true"] {
-    background: hsl(var(--sidebar-accent));
+    background: hsl(var(--sidebar-accent) / 0.82);
     color: hsl(var(--sidebar-accent-foreground));
+    box-shadow: inset 2px 0 0 hsl(var(--foreground));
   }
 
   [data-sidebar="menu-button"][data-active="true"] svg {
-    color: hsl(var(--muted-foreground));
+    color: hsl(var(--foreground));
+  }
+
+  .admin-page [data-slot="card"] {
+    border-radius: 0.5rem;
+    box-shadow: none;
+  }
+
+  .admin-page [data-slot="card-header"] {
+    padding: 1.25rem;
+  }
+
+  .admin-page [data-slot="card-content"] {
+    padding: 0 1.25rem 1.25rem;
+  }
+
+  .admin-page [data-slot="card-title"] {
+    font-size: 0.9375rem;
+    line-height: 1.4;
+  }
+
+  .admin-page [data-slot="table-header"] {
+    background: hsl(var(--muted) / 0.48);
+  }
+
+  .admin-page [data-slot="table-head"] {
+    height: 2.5rem;
+    padding-left: 0.75rem;
+    padding-right: 0.75rem;
+    font-size: 0.75rem;
+  }
+
+  .admin-page [data-slot="table-cell"] {
+    padding: 0.75rem;
+  }
+
+  .admin-page [data-slot="table-row"]:hover {
+    background: hsl(var(--muted) / 0.32);
   }
 }
 

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

@@ -52,10 +52,10 @@ export type PermissionGroupSummary = { id: string; name: string }
 export type PermissionGroup = { id: string; name: string; description: string; permissions: PermissionKey[]; limits: PermissionLimits; system: boolean; userCount: number; createdAt: string; updatedAt: string }
 export type User = { id: string; loginName?: string; email: string; displayName: string; role: "admin" | "user"; disabled: boolean; protected: boolean; twoFactorEnabled: boolean; mailboxLimitOverride?: number | null; permissions: PermissionKey[]; limits: PermissionLimits; permissionGroupIds: string[]; permissionGroups: PermissionGroupSummary[]; createdAt: string }
 export type APIToken = { id: string; name: string; lastUsedAt?: string; expiresAt?: string; disabled: boolean; scopes: string[]; createdAt: string; updatedAt: string }
-export type AdminUser = User & { mailboxCount: number; mailboxes?: string[] }
+export type AdminUser = User & { mailboxCount: number; mailboxes?: string[]; storageQuotaMb: number }
 export type AdminOverview = { users: number; activeUsers: number; domains: number; mailboxes: number; activeMailboxes: number; aliases: number; messages: number; unreadMessages: number; storageBytes: number }
 export type Domain = { id: string; name: string; status: string; dkimSelector: string; dkimPublicKey?: string; dnsStatus: string; dnsCheckedAt?: string; createdAt: string }
-export type Mailbox = { id: string; userId: string; userEmail?: string; domainId: string; localPart: string; address: string; displayName: string; quotaMb: number; status: string; unreadCount?: number; createdAt: string }
+export type Mailbox = { id: string; userId: string; userEmail?: string; domainId: string; localPart: string; address: string; displayName: string; quotaMb: number; status: string; primary?: boolean; unreadCount?: number; createdAt: string }
 export type Alias = { id: string; domainId: string; source: string; destination: string; enabled: boolean; createdAt: string }
 export type MailFolder = { id: string; name: string; role: string; icon: string; sortOrder: number; 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 }
@@ -202,6 +202,12 @@ export type SystemUpdateResult = {
   targetVersion: string
   message: string
 }
+export type BackupItem = { name: string; size: number; createdAt: string; sha256?: string }
+export type BackupJob = { status: "running" | "success" | "failed"; startedAt: string; error?: string }
+export type BackupTransfer = { provider: "telegram" | "googleDrive"; name: string; status: "queued" | "running" | "success" | "failed"; uploaded: number; total: number; startedAt: string; finishedAt?: string; error?: string }
+export type BackupSchedule = { enabled: boolean; days: number; passwordSet: boolean; passwordHint?: string; serverIp: string; chatId: string; telegramMode: "system" | "custom"; telegramEnabled: boolean; googleDriveEnabled: boolean }
+export type GoogleDriveBackupStatus = { clientId: string; clientSecretSet: boolean; connected: boolean; folderName: string }
+export type BackupList = { enabled: boolean; telegramSet: boolean; telegramLimit: number; job?: BackupJob; items: BackupItem[]; schedule: BackupSchedule; googleDrive: GoogleDriveBackupStatus; transfers: BackupTransfer[] }
 export type SystemSettings = {
   publicHostname: string
   publicBaseUrl: string

apps/web/src/lib/api.ts

@@ -1,4 +1,4 @@
-import type { User, AdminUser, AdminOverview, Domain, Mailbox, Alias, MailFolder, MailLabel, MailMessage, MailTranslation, DNSRecord, DNSCheckResult, ListResponse, SendPayload, DraftPayload, ScheduleSendPayload, ScheduledSend, SendQueueItem, SendQueueAuditEvent, SendQueueStatus, Contact, MailSignature, MailRule, MailRuleCondition, MailRuleAction, BlockedSender, MailStats, ForwardingSettings, ExternalImapAccount, ExternalImapAccountPayload, ExternalImapFolder, ExternalImapOAuthProvider, ExternalImapOAuthStartPayload, ExternalImapSyncRun, MailboxApplyOptions, MailTemplate, MaildirSyncHealth, SystemSettings, SystemSettingsPayload, SystemVersion, SystemUpdateResult, PublicSettings, LoginPayload, LoginResponse, RegisterPayload, PermissionGroup, PermissionInfo, PermissionKey, PermissionLimits, APIToken, TwoFactorEnableResponse, BulkMoveResult, TelegramPrivateChat, TelegramPairing } from "./api-types"
+import type { User, AdminUser, AdminOverview, Domain, Mailbox, Alias, MailFolder, MailLabel, MailMessage, MailTranslation, DNSRecord, DNSCheckResult, ListResponse, SendPayload, DraftPayload, ScheduleSendPayload, ScheduledSend, SendQueueItem, SendQueueAuditEvent, SendQueueStatus, Contact, MailSignature, MailRule, MailRuleCondition, MailRuleAction, BlockedSender, MailStats, ForwardingSettings, ExternalImapAccount, ExternalImapAccountPayload, ExternalImapFolder, ExternalImapOAuthProvider, ExternalImapOAuthStartPayload, ExternalImapSyncRun, MailboxApplyOptions, MailTemplate, MaildirSyncHealth, SystemSettings, SystemSettingsPayload, SystemVersion, SystemUpdateResult, BackupList, PublicSettings, LoginPayload, LoginResponse, RegisterPayload, PermissionGroup, PermissionInfo, PermissionKey, PermissionLimits, APIToken, TwoFactorEnableResponse, BulkMoveResult, TelegramPrivateChat, TelegramPairing } from "./api-types"
 export * from "./api-types"
 
 const REQUEST_TIMEOUT_MS = 15_000
@@ -172,8 +172,8 @@ export const api = {
   updatePermissionGroup: (id: string, payload: { name: string; description: string; permissions: PermissionKey[]; limits: PermissionLimits }) => request<PermissionGroup>(`/api/admin/permission-groups/${id}`, { method: "POST", body: JSON.stringify(payload) }),
   defaultPermissionLimits: () => request<PermissionLimits>("/api/admin/permission-limits/defaults"),
   deletePermissionGroup: (id: string) => request<{ ok: boolean }>(`/api/admin/permission-groups/${id}`, { method: "DELETE" }),
-  createUser: (payload: { email: string; displayName: string; role: "user"; password: string; disabled: boolean; mailboxLimitOverride?: number }) => request<AdminUser>("/api/admin/users", { method: "POST", body: JSON.stringify(payload) }),
-  updateUser: (id: string, payload: { email?: string; displayName: string; role: "admin" | "user"; disabled: boolean; mailboxLimitOverride?: number; permissionGroupIds?: string[] }) => request<AdminUser>(`/api/admin/users/${id}`, { method: "POST", body: JSON.stringify(payload) }),
+  createUser: (payload: { email: string; displayName: string; role: "user"; password: string; disabled: boolean; mailboxLimitOverride?: number; storageQuotaMb?: number; permissionGroupIds?: string[] }) => request<AdminUser>("/api/admin/users", { method: "POST", body: JSON.stringify(payload) }),
+  updateUser: (id: string, payload: { email?: string; displayName: string; role: "admin" | "user"; disabled: boolean; mailboxLimitOverride?: number; storageQuotaMb?: number; permissionGroupIds?: string[] }) => request<AdminUser>(`/api/admin/users/${id}`, { method: "POST", body: JSON.stringify(payload) }),
   resetUserPassword: (id: string, password: string) => request<{ ok: boolean }>(`/api/admin/users/${id}/password`, { method: "POST", body: JSON.stringify({ password }) }),
   deleteUser: (id: string) => request<{ ok: boolean }>(`/api/admin/users/${id}`, { method: "DELETE" }),
   domains: () => request<ListResponse<Domain>>("/api/admin/domains"),
@@ -181,7 +181,7 @@ export const api = {
   updateDomain: (id: string, payload: { status: string }) => request<Domain>(`/api/admin/domains/${id}`, { method: "POST", body: JSON.stringify(payload) }),
   deleteDomain: (id: string) => request<{ ok: boolean }>(`/api/admin/domains/${id}`, { method: "DELETE" }),
   mailboxes: () => request<ListResponse<Mailbox>>("/api/admin/mailboxes"),
-  createMailbox: (payload: { domainId: string; localPart: string; displayName: string; password: string; quotaMb: number; role: "user"; ownerEmail?: string; userId?: string }) => request<Mailbox>("/api/admin/mailboxes", { method: "POST", body: JSON.stringify(payload) }),
+  createMailbox: (payload: { domainId: string; localPart: string; displayName?: string; userId: string }) => request<Mailbox>("/api/admin/mailboxes", { method: "POST", body: JSON.stringify(payload) }),
   updateMailbox: (id: string, payload: { userId: string; displayName: string; quotaMb: number; status: string }) => request<Mailbox>(`/api/admin/mailboxes/${id}`, { method: "POST", body: JSON.stringify(payload) }),
   deleteMailbox: (id: string) => request<{ ok: boolean }>(`/api/admin/mailboxes/${id}`, { method: "DELETE" }),
   aliases: () => request<ListResponse<Alias>>("/api/admin/aliases"),
@@ -211,6 +211,18 @@ export const api = {
   },
   systemVersion: () => request<SystemVersion>("/api/admin/system/version"),
   updateSystem: () => request<SystemUpdateResult>("/api/admin/system/update", { method: "POST", timeoutMs: 45_000 }),
+  backups: () => request<BackupList>("/api/admin/backups"),
+  createBackup: (password: string, confirmPassword: string, sendTelegram: boolean, uploadGoogleDrive: boolean) => request<{ ok: boolean; message: string }>("/api/admin/backups", { method: "POST", body: JSON.stringify({ password, confirmPassword, sendTelegram, uploadGoogleDrive }) }),
+  updateBackupSettings: (payload: { enabled: boolean; days: number; password: string; confirmPassword: string; serverIp: string; chatId: string; telegramMode: "system" | "custom"; telegramEnabled: boolean; googleDriveEnabled: boolean; googleClientId: string; googleClientSecret: string; googleFolderName: string }) => request<import("./api-types").BackupSchedule>("/api/admin/backups/settings", { method: "POST", body: JSON.stringify(payload) }),
+  updateBackupPassword: (password: string, confirmPassword: string) => request<{ passwordSet: boolean; passwordHint: string }>("/api/admin/backups/password", { method: "POST", body: JSON.stringify({ password, confirmPassword }) }),
+  testBackupTelegram: (payload: { mode: "system" | "custom"; chatId: string }) => request<{ ok: boolean }>("/api/admin/backups/telegram/test", { method: "POST", body: JSON.stringify(payload), timeoutMs: MAIL_DELIVERY_TIMEOUT_MS }),
+  discoverBackupTelegramGroup: (pairingCode: string) => request<{ items: TelegramPrivateChat[] }>("/api/admin/backups/telegram/discover-group", { method: "POST", body: JSON.stringify({ pairingCode }) }),
+  connectGoogleDrive: () => request<{ url: string }>("/api/admin/backups/google-drive/connect", { method: "POST" }),
+  disconnectGoogleDrive: () => request<{ ok: boolean }>("/api/admin/backups/google-drive", { method: "DELETE" }),
+  verifyBackup: (name: string) => request<{ ok: boolean; sha256: string }>(`/api/admin/backups/${encodeURIComponent(name)}/verify`, { method: "POST", timeoutMs: 60_000 }),
+  sendBackupTelegram: (name: string) => request<{ ok: boolean }>(`/api/admin/backups/${encodeURIComponent(name)}/telegram`, { method: "POST", timeoutMs: 10 * 60_000 }),
+  sendBackupGoogleDrive: (name: string) => request<{ ok: boolean }>(`/api/admin/backups/${encodeURIComponent(name)}/google-drive`, { method: "POST", timeoutMs: 30 * 60_000 }),
+  deleteBackup: (name: string) => request<{ ok: boolean }>(`/api/admin/backups/${encodeURIComponent(name)}`, { method: "DELETE" }),
   systemSettings: () => request<SystemSettings>("/api/admin/settings"),
   maildirSyncHealth: () => request<MaildirSyncHealth>("/api/admin/maildir-sync/health"),
   updateSystemSettings: (payload: SystemSettingsPayload) => request<SystemSettings>("/api/admin/settings", { method: "POST", body: JSON.stringify(payload) }),

apps/web/src/main.tsx

@@ -4,6 +4,7 @@ import { QueryClient, QueryClientProvider } from "@tanstack/react-query"
 import { Navigate, RouterProvider, createBrowserRouter } from "react-router-dom"
 import { Toaster } from "@/components/ui/toaster"
 import { LanguageDomSync } from "@/lib/language"
+import { applyTheme, getInitialTheme } from "@/lib/theme"
 import { ProtectedLayout } from "@/components/protected-layout"
 import { AdminOnly } from "@/components/admin-only"
 import "./index.css"
@@ -15,6 +16,8 @@ const AdminPage = React.lazy(() => import("@/pages/admin").then((module) => ({ d
 const ProfilePage = React.lazy(() => import("@/pages/profile").then((module) => ({ default: module.ProfilePage })))
 const NotFoundPage = React.lazy(() => import("@/pages/not-found").then((module) => ({ default: module.NotFoundPage })))
 
+applyTheme(getInitialTheme())
+
 const queryClient = new QueryClient({ defaultOptions: { queries: { refetchOnWindowFocus: false, staleTime: 10_000 } } })
 const router = createBrowserRouter([
   { path: "/login", element: <LoginPage /> },

apps/web/src/pages/mail.tsx

@@ -29,6 +29,7 @@ import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@
 import { ScrollArea } from "@/components/ui/scroll-area"
 import { Separator } from "@/components/ui/separator"
 import { Skeleton } from "@/components/ui/skeleton"
+import { Switch } from "@/components/ui/switch"
 import { Avatar, AvatarFallback } from "@/components/ui/avatar"
 import { ConfirmDialog } from "@/components/confirm-dialog"
 import {
@@ -202,6 +203,8 @@ export function MailPage() {
   const [selectedMailboxId, setSelectedMailboxId] = React.useState("all")
   const [selectedExternalAccountId, setSelectedExternalAccountId] = React.useState("")
   const [expandedExternalAccountIds, setExpandedExternalAccountIds] = React.useState<string[]>([])
+  const [foldersExpanded, setFoldersExpanded] = React.useState(true)
+  const [labelsExpanded, setLabelsExpanded] = React.useState(true)
   const [externalFolder, setExternalFolder] = React.useState("INBOX")
   const [darkMode, setDarkMode] = React.useState(getInitialTheme)
   const [language, setLanguage] = useLanguage()
@@ -484,7 +487,16 @@ export function MailPage() {
     },
     onSettled: () => { qc.invalidateQueries({ queryKey: ["labels"] }); qc.invalidateQueries({ queryKey: ["messages"] }) },
   })
-  const del = useMutation({ mutationFn: (id: string) => api.delete(id), onSuccess: async () => { setSelectedId(null); setPendingConfirm(null); await qc.invalidateQueries({ queryKey: ["messages"] }); await qc.invalidateQueries({ queryKey: ["folders"] }); await qc.invalidateQueries({ queryKey: ["mailboxes"] }); await qc.invalidateQueries({ queryKey: ["mail-stats"] }); await qc.invalidateQueries({ queryKey: ["labels"] }); toast({ title: "已删除" }) }, onError: (error) => toast({ title: "删除失败", description: error.message }) })
+  const del = useMutation({
+    mutationFn: ({ id }: { id: string; permanent: boolean }) => api.delete(id),
+    onSuccess: async (_, { permanent }) => {
+      setSelectedId(null)
+      setPendingConfirm(null)
+      await refreshMailData()
+      toast({ title: permanent ? "邮件已永久删除" : "邮件已移入已删除" })
+    },
+    onError: (error) => toast({ title: "删除失败", description: error.message }),
+  })
   const move = useMutation({ mutationFn: ({ id, folder }: { id: string; folder: string }) => api.move(id, folder), onSuccess: async () => { setSelectedId(null); await qc.invalidateQueries({ queryKey: ["messages"] }); await qc.invalidateQueries({ queryKey: ["folders"] }); await qc.invalidateQueries({ queryKey: ["mailboxes"] }); await qc.invalidateQueries({ queryKey: ["mail-stats"] }); await qc.invalidateQueries({ queryKey: ["labels"] }); toast({ title: "已移动" }) }, onError: (error) => toast({ title: "移动失败", description: error.message }) })
   const cancelScheduledSend = useMutation({
     mutationFn: (item: ScheduledSend) => api.cancelScheduledSend(item.id),
@@ -812,10 +824,19 @@ export function MailPage() {
         await Promise.all(ids.map((id) => api.star(id, starred)))
       } else if (action === "delete") {
         await Promise.all(ids.map((id) => api.delete(id)))
+        completionTitle = `已永久删除 ${ids.length} 封邮件`
       } else {
         const target = action === "archive" ? "Archive" : action === "inbox" ? "Inbox" : action === "trash" ? "Trash" : "Spam"
         const result = await api.bulkMove(ids, target)
-        completionTitle = result.ok ? result.message : "批量移动部分失败"
+        completionTitle = result.ok
+          ? target === "Trash"
+            ? `已将 ${result.moved} 封邮件移入已删除`
+            : target === "Spam"
+              ? `已将 ${result.moved} 封邮件移入垃圾邮件`
+              : target === "Inbox"
+                ? `已将 ${result.moved} 封邮件移回收件箱`
+                : `已归档 ${result.moved} 封邮件`
+          : "批量移动部分失败"
         completionDescription = result.ok ? undefined : result.message
       }
       if (selectedId && ids.includes(selectedId)) setSelectedId(null)
@@ -847,11 +868,14 @@ export function MailPage() {
     }
   }
   function confirmDeleteMessage(message: MailMessage) {
+    const permanent = message.folder === "Trash"
     setPendingConfirm({
-      title: "删除这封邮件？",
-      description: `邮件“${message.subject || "无主题"}”将被删除。`,
-      confirmText: "删除邮件",
-      onConfirm: () => del.mutate(message.id),
+      title: permanent ? "永久删除这封邮件？" : "将这封邮件移入已删除？",
+      description: permanent
+        ? `邮件“${message.subject || "无主题"}”将被永久删除，且无法恢复。`
+        : `邮件“${message.subject || "无主题"}”将移入已删除。`,
+      confirmText: permanent ? "永久删除" : "移入已删除",
+      onConfirm: () => del.mutate({ id: message.id, permanent }),
     })
   }
   function openCompose(draft?: ComposeDraft) {
@@ -1283,8 +1307,8 @@ export function MailPage() {
     setAdvancedSearchOpen(false)
   }
   const sidebarContent = (
-    <Sidebar collapsible="none" className="h-full w-full border-r border-border bg-sidebar text-sidebar-foreground">
-      <SidebarHeader className={cn("pb-2 pt-3", sidebarCollapsed ? "px-2" : "px-3")}>
+    <Sidebar collapsible="none" className="h-full min-h-0 w-full overflow-hidden border-r border-border bg-sidebar text-sidebar-foreground">
+      <SidebarHeader className={cn("shrink-0 pb-2 pt-3", sidebarCollapsed ? "px-2" : "px-3")}>
         <AccountHeader
           collapsed={sidebarCollapsed}
           name={me.data?.user.displayName || selectedMailbox?.address || "NewSzxcn"}
@@ -1328,7 +1352,7 @@ export function MailPage() {
           </Button>
         )}
       </SidebarHeader>
-      <SidebarContent className="px-1">
+      <SidebarContent className="min-h-0 overflow-x-hidden overflow-y-auto overscroll-contain px-1 pb-4">
         {!sidebarCollapsed && publicSettings.isError && <SidebarQueryFailure label="邮箱设置读取失败" onRetry={() => { void publicSettings.refetch() }} />}
         <SidebarGroup>
           {!sidebarCollapsed && (
@@ -1438,7 +1462,10 @@ export function MailPage() {
         {(customMailMenuItems.length > 0 || canManageFolders) && <SidebarGroup>
           {!sidebarCollapsed && (
             <div className="flex items-center justify-between px-2 py-1">
-              <SidebarGroupLabel className="m-0 h-auto gap-1 p-0 text-xs font-semibold text-muted-foreground"><ChevronDown className="h-3 w-3" />文件夹</SidebarGroupLabel>
+              <Button type="button" variant="ghost" className="h-auto min-w-0 justify-start gap-1 p-0 text-xs font-semibold text-muted-foreground hover:bg-transparent hover:text-foreground" aria-expanded={foldersExpanded} aria-controls="mail-sidebar-folders" onClick={() => setFoldersExpanded((value) => !value)}>
+                <ChevronDown className={cn("h-3 w-3 shrink-0 transition-transform", !foldersExpanded && "-rotate-90")} />
+                <span>文件夹</span>
+              </Button>
               {canManageFolders && (
                 <Button type="button" variant="ghost" size="icon" className="h-5 w-5 text-muted-foreground hover:bg-transparent hover:text-foreground" aria-label="新建文件夹" title="新建文件夹" onClick={() => runAfterClosingMobileSidebar(() => setFolderDialogOpen(true))}>
                   <Plus className="h-3.5 w-3.5" />
@@ -1446,7 +1473,7 @@ export function MailPage() {
               )}
             </div>
           )}
-          <SidebarGroupContent>
+          {foldersExpanded && <SidebarGroupContent id="mail-sidebar-folders">
             <SidebarMenu>
               {customMailMenuItems.map((item) => (
                 <SidebarMenuItem
@@ -1492,12 +1519,15 @@ export function MailPage() {
                 />
               )}
             </SidebarMenu>
-          </SidebarGroupContent>
+          </SidebarGroupContent>}
         </SidebarGroup>}
         {(canReadMail || canManageLabels) && <SidebarGroup>
           {!sidebarCollapsed && (
             <div className="flex items-center justify-between px-2 py-1">
-              <SidebarGroupLabel className="m-0 h-auto gap-1 p-0 text-xs font-semibold text-muted-foreground"><ChevronDown className="h-3 w-3" />标签</SidebarGroupLabel>
+              <Button type="button" variant="ghost" className="h-auto min-w-0 justify-start gap-1 p-0 text-xs font-semibold text-muted-foreground hover:bg-transparent hover:text-foreground" aria-expanded={labelsExpanded} aria-controls="mail-sidebar-labels" onClick={() => setLabelsExpanded((value) => !value)}>
+                <ChevronDown className={cn("h-3 w-3 shrink-0 transition-transform", !labelsExpanded && "-rotate-90")} />
+                <span>标签</span>
+              </Button>
               {canManageCurrentMailboxLabels && (
                 <div className="flex items-center gap-0.5">
                 <Button type="button" variant="ghost" size="icon" className="h-5 w-5 text-muted-foreground hover:bg-transparent hover:text-foreground" aria-label="新建标签" title="新建标签" onClick={() => { setNewLabelEditing(true); setLabelEditMode(true) }}>
@@ -1512,7 +1542,7 @@ export function MailPage() {
               )}
             </div>
           )}
-          <SidebarGroupContent>
+          {labelsExpanded && <SidebarGroupContent id="mail-sidebar-labels">
             <SidebarMenu>
               {canReadMail && labelItems.map((label) => {
                 const dotColor = labelDotColor(label)
@@ -1558,7 +1588,7 @@ export function MailPage() {
             </SidebarMenu>
             {labels.isLoading && <FolderSkeleton />}
             {!sidebarCollapsed && labels.isError && <SidebarQueryFailure label="标签读取失败" onRetry={() => { void labels.refetch() }} />}
-          </SidebarGroupContent>
+          </SidebarGroupContent>}
         </SidebarGroup>}
       </SidebarContent>
       <SidebarContextMenu
@@ -1661,7 +1691,9 @@ export function MailPage() {
     <MailQueryFailure error={mailMessagesError} onRetry={() => { void refetchMessages() }} />
   ) : compactMailLayout ? (
     <CompactMailView
+      key={`${mailView}:${mailView === "folder" ? folder : mailView === "label" ? selectedLabelId : selectedExternalAccountId}`}
       title={viewTitle}
+      currentFolder={mailView === "folder" ? folder : undefined}
       icon={mailView === "label" && selectedLabel ? <Badge variant="outline" className="gap-1.5 rounded-md font-normal"><span className="h-2 w-2 shrink-0 rounded-full" style={{ backgroundColor: labelDotColor(selectedLabel) }} />{selectedLabel.name}</Badge> : undefined}
       messages={visibleMessages}
       total={allMessages.length}
@@ -1770,12 +1802,12 @@ export function MailPage() {
           {selectedCountOnPage > 0 && canOrganizeMail && mailView !== "unknown" && (
             <div className="flex min-h-10 shrink-0 items-center gap-3 border-b px-3 py-1.5">
               <span className="shrink-0 text-[13px] text-muted-foreground">已选 {selectedCountOnPage} 封</span>
-              <BulkActionToolbar pending={bulkPending} currentFolder={folder} folders={folders.data?.items || []} readAction={bulkReadAction} onAction={runBulkAction} onMoveToFolder={runBulkMoveToFolder} />
+              <BulkActionToolbar pending={bulkPending} currentFolder={mailView === "folder" ? folder : undefined} folders={folders.data?.items || []} readAction={bulkReadAction} onAction={runBulkAction} onMoveToFolder={runBulkMoveToFolder} />
             </div>
           )}
           <ScrollArea className="min-h-0 flex-1">
             {mailMessagesLoading && <MessageSkeleton />}
-            {visibleMessages.map((m) => <MessageRow key={m.id} message={m} active={selectedId === m.id} checked={compactSelectedIds.includes(m.id)} scheduled={scheduledDraftIds.has(m.id)} onCheckedChange={(checked) => toggleCompactSelect(m.id, checked)} onClick={() => openMessage(m.id)} onContextMenu={(event) => openMessageContextMenu(event, m)} onStar={() => star.mutate({ id: m.id, starred: !m.isStarred })} onArchive={() => move.mutate({ id: m.id, folder: m.folder === "Archive" ? "Inbox" : "Archive" })} onTrash={() => move.mutate({ id: m.id, folder: "Trash" })} onToggleRead={() => markRead.mutate({ id: m.id, read: !m.isRead })} canOrganize={canOrganizeMail && mailView !== "unknown"} />)}
+            {visibleMessages.map((m) => <MessageRow key={m.id} message={m} active={selectedId === m.id} checked={compactSelectedIds.includes(m.id)} scheduled={scheduledDraftIds.has(m.id)} onCheckedChange={(checked) => toggleCompactSelect(m.id, checked)} onClick={() => openMessage(m.id)} onContextMenu={(event) => openMessageContextMenu(event, m)} onStar={() => star.mutate({ id: m.id, starred: !m.isStarred })} onArchive={() => move.mutate({ id: m.id, folder: m.folder === "Archive" ? "Inbox" : "Archive" })} onTrash={() => m.folder === "Trash" ? confirmDeleteMessage(m) : move.mutate({ id: m.id, folder: "Trash" })} onToggleRead={() => markRead.mutate({ id: m.id, read: !m.isRead })} canOrganize={canOrganizeMail && mailView !== "unknown"} />)}
             {!mailMessagesLoading && visibleMessages.length === 0 && <div className="grid min-h-[170px] place-items-center px-8 py-12 text-center text-base text-muted-foreground">{emptyMessage}</div>}
             {!mailMessagesLoading && hasMoreMessages && (
               <div className="border-b p-4 text-center">
@@ -1819,7 +1851,7 @@ export function MailPage() {
                   ) : (
                     <Button variant="outline" size="sm" onClick={() => move.mutate({ id: selected.id, folder: "Archive" })}>归档</Button>
                   ))}
-                  {mailView !== "external" && mailView !== "unknown" && canOrganizeMail && <Button variant="destructive" size="sm" onClick={() => confirmDeleteMessage(selected)}>删除</Button>}
+                  {mailView !== "external" && mailView !== "unknown" && canOrganizeMail && <Button variant="destructive" size="sm" onClick={() => confirmDeleteMessage(selected)}>{selected.folder === "Trash" ? "永久删除" : "移入已删除"}</Button>}
                 </div>
               </div>
               <MessageMetaPanel
@@ -1852,7 +1884,7 @@ export function MailPage() {
                   </SheetTrigger>
                   <SheetContent side="left" className="w-[86vw] max-w-80 p-0 [&>button]:hidden" aria-describedby={undefined}>
                     <SheetTitle className="sr-only">邮箱导航</SheetTitle>
-                    <div className="h-svh">{sidebarContent}</div>
+                    <div className="h-svh min-h-0 overflow-hidden">{sidebarContent}</div>
                   </SheetContent>
                 </Sheet>
                 <div className="min-w-0 flex-1 text-sm font-semibold">{mailView === "label" && selectedLabel ? <Badge variant="outline" className="gap-1.5 rounded-md font-normal"><span className="h-2 w-2 shrink-0 rounded-full" style={{ backgroundColor: labelDotColor(selectedLabel) }} />{selectedLabel.name}</Badge> : viewTitle}</div>
@@ -1868,7 +1900,7 @@ export function MailPage() {
           </div>
         ) : (
           <div className="mail-shell-grid h-full min-h-0 w-full min-w-0 overflow-hidden">
-            <div className="min-w-0">
+            <div className="h-full min-h-0 min-w-0 overflow-hidden">
               {sidebarContent}
             </div>
             <section className="flex h-full min-h-0 min-w-0 flex-col">
@@ -2566,6 +2598,7 @@ type BulkAction = "read" | "unread" | "star" | "unstar" | "archive" | "inbox" |
 
 function BulkActionToolbar({ pending, currentFolder, folders = [], readAction = "read", onAction, onMoveToFolder }: { pending: boolean; currentFolder?: string; folders?: MailFolder[]; readAction?: "read" | "unread"; onAction: (action: BulkAction) => void; onMoveToFolder?: (folderName: string) => void }) {
   const buttonClass = "h-7 w-7 rounded-md text-muted-foreground hover:bg-accent hover:text-foreground"
+  const permanentlyDelete = currentFolder === "Trash"
   const archiveAction: BulkAction = currentFolder === "Archive" ? "inbox" : "archive"
   const archiveLabel = currentFolder === "Archive" ? "移回收件箱" : "归档"
   const movableFolders = folders.filter((folder) => folder.name !== currentFolder && folder.name !== "Drafts")
@@ -2594,7 +2627,7 @@ function BulkActionToolbar({ pending, currentFolder, folders = [], readAction =
           </DropdownMenuContent>
         </DropdownMenu>
       )}
-      <Button type="button" variant="ghost" size="icon" className={cn(buttonClass, "text-destructive hover:bg-destructive/10 hover:text-destructive")} disabled={pending} onClick={() => onAction("trash")} title="移入已删除" aria-label="移入已删除">
+      <Button type="button" variant="ghost" size="icon" className={cn(buttonClass, "text-destructive hover:bg-destructive/10 hover:text-destructive")} disabled={pending} onClick={() => onAction(permanentlyDelete ? "delete" : "trash")} title={permanentlyDelete ? "永久删除" : "移入已删除"} aria-label={permanentlyDelete ? "永久删除" : "移入已删除"}>
         <Trash2 className="h-3.5 w-3.5" />
       </Button>
     </div>
@@ -2641,7 +2674,7 @@ function SidebarContextMenu({ state, canCreate, canReorder, canDelete, pending,
       </Button>
       {canCreate && (
         <Button type="button" variant="ghost" className={itemClass} onClick={onCreateFolder}>
-          <Plus className="h-4 w-4" />新建文件夹
+          新建文件夹
         </Button>
       )}
       {customFolder && (canReorder || canDelete) && (
@@ -2776,7 +2809,7 @@ function MessageContextMenu({ state, labels, folders, canSend, canOrganize, canM
       {canOrganize && (
         <>
           <div className="-mx-1 my-1 h-px bg-border" />
-          {item("删除", <Trash2 className="h-4 w-4" />, "delete", true)}
+          {item(message.folder === "Trash" ? "永久删除" : "移入已删除", <Trash2 className="h-4 w-4" />, "delete", true)}
         </>
       )}
     </div>
@@ -2874,6 +2907,7 @@ function CreateFolderDialog({ open, pending, onOpenChange, onCreate }: { open: b
 
 function CompactMailView({
   title,
+  currentFolder,
   icon,
   messages,
   total,
@@ -2917,6 +2951,7 @@ function CompactMailView({
   tools,
 }: {
   title: string
+  currentFolder?: string
   icon?: React.ReactNode
   messages: MailMessage[]
   total: number
@@ -3008,7 +3043,7 @@ function CompactMailView({
           {selectedIds.length > 0 ? (
             <>
               <span className="hidden text-xs text-muted-foreground min-[380px]:inline">已选 {selectedIds.length} 封</span>
-              {canOrganize && <BulkActionToolbar pending={bulkPending} onAction={onBulkAction} />}
+              {canOrganize && <BulkActionToolbar pending={bulkPending} currentFolder={currentFolder} onAction={onBulkAction} />}
             </>
           ) : (
             <div className="flex items-center gap-1">
@@ -3119,7 +3154,7 @@ function CompactMessageDetail({
                     {canOrganize && <DropdownMenuItem onSelect={() => onStar(selected)}><Star className={cn("h-4 w-4", selected.isStarred && "fill-yellow-400 text-yellow-500")} />{selected.isStarred ? "取消星标" : "添加星标"}</DropdownMenuItem>}
                   </>
                 )}
-                {canOrganize && <DropdownMenuItem onSelect={() => onDelete(selected)} className="text-destructive"><Trash2 className="h-4 w-4" />删除</DropdownMenuItem>}
+                {canOrganize && <DropdownMenuItem onSelect={() => onDelete(selected)} className="text-destructive"><Trash2 className="h-4 w-4" />{selected.folder === "Trash" ? "永久删除" : "移入已删除"}</DropdownMenuItem>}
               </DropdownMenuContent>
             </DropdownMenu>
           )}
@@ -3139,7 +3174,7 @@ function CompactMessageDetail({
                 {selected && canOrganize && <Button variant="outline" size="sm" onClick={() => onStar(selected)}><Star className={cn("h-4 w-4", selected.isStarred && "fill-yellow-400 text-yellow-500")} />{selected.isStarred ? "取消星标" : "添加星标"}</Button>}
               </>
             )}
-            {selected && canOrganize && <Button variant="outline" size="sm" onClick={() => onDelete(selected)}><Trash2 className="h-4 w-4" />删除</Button>}
+            {selected && canOrganize && <Button variant="outline" size="sm" onClick={() => onDelete(selected)}><Trash2 className="h-4 w-4" />{selected.folder === "Trash" ? "永久删除" : "移入已删除"}</Button>}
           </div>
           <div className="flex items-center gap-2">
             <Button variant="ghost" size="sm" disabled={!previousMessage} onClick={() => previousMessage && onSelect(previousMessage.id)}>上一封</Button>
@@ -3179,23 +3214,41 @@ function CompactMessageDetail({
 
 
 function TranslatableMailBody({ message, language }: { message: MailMessage; language: Language }) {
+  const qc = useQueryClient()
   const [translatedText, setTranslatedText] = React.useState("")
   const [translatedHtml, setTranslatedHtml] = React.useState("")
   const [showTranslated, setShowTranslated] = React.useState(false)
   const [truncated, setTruncated] = React.useState(false)
+  const [autoTranslate, setAutoTranslate] = React.useState(() => {
+    try {
+      return window.localStorage.getItem("newszxcn.mail.auto-translate") !== "false"
+    } catch {
+      return true
+    }
+  })
   const { toast } = useToast()
   const targetLanguage = normalizeTranslationLanguage(language)
   const sourceText = React.useMemo(() => (message.bodyText || stripHtml(message.bodyHtml || message.snippet || "")).trim(), [message.bodyHtml, message.bodyText, message.snippet])
   const shouldShow = targetLanguage && (message.externalAccountId || message.mailboxId) && shouldOfferMessageTranslation(sourceText, language)
+  const translationKey = React.useMemo(() => ["mail-translation", message.externalAccountId || "local", message.id, targetLanguage] as const, [message.externalAccountId, message.id, targetLanguage])
   const translatedMessage = React.useMemo<MailMessage>(() => ({ ...message, bodyText: translatedText, bodyHtml: translatedHtml }), [message, translatedHtml, translatedText])
+  const applyTranslation = React.useCallback((result: Awaited<ReturnType<typeof api.translateMessage>>, display = true) => {
+    setTranslatedText(result.translatedText)
+    setTranslatedHtml(result.translatedHtml || "")
+    setTruncated(result.truncated)
+    setShowTranslated(display)
+  }, [])
   const translate = useMutation({
-    mutationFn: () => message.externalAccountId ? api.translateExternalMessage(message.externalAccountId, message.id, targetLanguage!) : api.translateMessage(message.id, targetLanguage!),
-    onSuccess: (result) => {
-      setTranslatedText(result.translatedText)
-      setTranslatedHtml(result.translatedHtml || "")
-      setTruncated(result.truncated)
-      setShowTranslated(true)
+    mutationFn: async ({ force = false }: { force?: boolean } = {}) => {
+      if (!force) {
+        const cached = qc.getQueryData<Awaited<ReturnType<typeof api.translateMessage>>>(translationKey)
+        if (cached) return cached
+      }
+      const result = message.externalAccountId ? await api.translateExternalMessage(message.externalAccountId, message.id, targetLanguage!) : await api.translateMessage(message.id, targetLanguage!)
+      qc.setQueryData(translationKey, result)
+      return result
     },
+    onSuccess: (result) => applyTranslation(result),
     onError: (error) => toast({ title: "翻译失败", description: error instanceof Error ? error.message : "请稍后重试" }),
   })
 
@@ -3205,8 +3258,30 @@ function TranslatableMailBody({ message, language }: { message: MailMessage; lan
     setShowTranslated(false)
     setTruncated(false)
     translate.reset()
+    const cached = qc.getQueryData<Awaited<ReturnType<typeof api.translateMessage>>>(translationKey)
+    if (cached) applyTranslation(cached, autoTranslate)
   }, [message.id, language])
 
+  React.useEffect(() => {
+    if (!autoTranslate || !shouldShow || translate.isPending) return
+    const cached = qc.getQueryData<Awaited<ReturnType<typeof api.translateMessage>>>(translationKey)
+    if (cached) {
+      applyTranslation(cached)
+      return
+    }
+    translate.mutate({ force: false })
+  }, [autoTranslate, message.id, shouldShow, targetLanguage])
+
+  const changeAutoTranslate = (checked: boolean) => {
+    setAutoTranslate(checked)
+    if (!checked) setShowTranslated(false)
+    try {
+      window.localStorage.setItem("newszxcn.mail.auto-translate", String(checked))
+    } catch {
+      // Keep the setting for this session when browser storage is unavailable.
+    }
+  }
+
   return (
     <>
       {(shouldShow || translatedText) && (
@@ -3217,8 +3292,12 @@ function TranslatableMailBody({ message, language }: { message: MailMessage; lan
               {truncated && <span className="ml-1">（内容较长，仅翻译前半部分）</span>}
             </div>
             <div className="flex items-center gap-2">
+              <label className="flex cursor-pointer items-center gap-2 whitespace-nowrap text-xs text-muted-foreground">
+                <Switch checked={autoTranslate} onCheckedChange={changeAutoTranslate} aria-label="自动翻译邮件" />
+                自动翻译
+              </label>
               {translatedText && <Button type="button" variant="ghost" size="sm" onClick={() => setShowTranslated((value) => !value)}>{showTranslated ? "显示原文" : "显示译文"}</Button>}
-              <Button type="button" variant="outline" size="sm" disabled={translate.isPending} onClick={() => translate.mutate()}>{translate.isPending ? "翻译中..." : translatedText ? "重新翻译" : "翻译"}</Button>
+              <Button type="button" variant="outline" size="sm" disabled={translate.isPending} onClick={() => translate.mutate({ force: !!translatedText })}>{translate.isPending ? "翻译中..." : translatedText ? "重新翻译" : "翻译"}</Button>
             </div>
           </div>
         </div>
@@ -3386,7 +3465,6 @@ function NewLabelButton({ collapsed, pending, onCreate, editing, onEditingChange
   }
   return (
     <SidebarMenuButton className="text-muted-foreground" onClick={() => setEditingState(true)}>
-      <Plus className="h-4 w-4" />
       <span>新建标签</span>
     </SidebarMenuButton>
   )
@@ -3775,7 +3853,7 @@ function MessageRow({
                 <Button type="button" variant="ghost" size="icon" aria-label={archiveLabel} title={archiveLabel} className={quickButtonClass} onClick={(event) => { event.stopPropagation(); onArchive() }}>
                   <Archive className="h-3.5 w-3.5" />
                 </Button>
-                <Button type="button" variant="ghost" size="icon" aria-label="移入已删除" title="移入已删除" className={quickButtonClass} onClick={(event) => { event.stopPropagation(); onTrash() }}>
+                <Button type="button" variant="ghost" size="icon" aria-label={message.folder === "Trash" ? "永久删除" : "移入已删除"} title={message.folder === "Trash" ? "永久删除" : "移入已删除"} className={quickButtonClass} onClick={(event) => { event.stopPropagation(); onTrash() }}>
                   <Trash2 className="h-3.5 w-3.5" />
                 </Button>
                 <Button type="button" variant="ghost" size="icon" aria-label={message.isRead ? "标为未读" : "标为已读"} title={message.isRead ? "标为未读" : "标为已读"} className={quickButtonClass} onClick={(event) => { event.stopPropagation(); onToggleRead() }}>
@@ -3838,6 +3916,7 @@ function ComposeDialog({ mailboxes, mailbox, open, draft, limits, canSend, canMa
   const [subjectValue, setSubjectValue] = React.useState(draft?.subject || "")
   const [draftStatus, setDraftStatus] = React.useState<"idle" | "saving" | "saved" | "error">("idle")
   const [lastSavedAt, setLastSavedAt] = React.useState<Date | null>(null)
+  const [closing, setClosing] = React.useState(false)
   const [scheduleDialogOpen, setScheduleDialogOpen] = React.useState(false)
   const [sendIntent, setSendIntent] = React.useState<ComposeSendIntent | null>(null)
   const sendStartedRef = React.useRef(false)
@@ -3953,7 +4032,7 @@ function ComposeDialog({ mailboxes, mailbox, open, draft, limits, canSend, canMa
   }, [files])
 
   React.useEffect(() => {
-    if (!open || sendStartedRef.current || !hasDraftContent || !canManageDrafts) return
+    if (!open || closing || sendStartedRef.current || !hasDraftContent || !canManageDrafts) return
     const payloadKey = JSON.stringify({ ...composePayload, draftId })
     if (payloadKey === lastSavedPayloadRef.current) return
     const timer = window.setTimeout(async () => {
@@ -3974,7 +4053,7 @@ function ComposeDialog({ mailboxes, mailbox, open, draft, limits, canSend, canMa
       }
     }, 5000)
     return () => window.clearTimeout(timer)
-  }, [open, hasDraftContent, composePayload, draftId, qc, canManageDrafts])
+  }, [open, closing, hasDraftContent, composePayload, draftId, qc, canManageDrafts])
 
   function buildSendWarnings(attachmentsCount: number) {
     const warnings: string[] = []
@@ -4026,6 +4105,10 @@ function ComposeDialog({ mailboxes, mailbox, open, draft, limits, canSend, canMa
     const to = splitEmails(toValue)
     const cc = showCc ? splitEmails(ccValue) : []
     const bcc = showBcc ? splitEmails(bccValue) : []
+    if (to.length === 0) {
+      toast({ title: "请填写收件人" })
+      return
+    }
     const text = body.text
     const html = body.html || plainTextToHtml(text)
     const payload: SendPayload = { mailboxId: senderMailbox.id, to, cc, bcc, subject: subjectValue, text, html, attachments }
@@ -4061,11 +4144,18 @@ function ComposeDialog({ mailboxes, mailbox, open, draft, limits, canSend, canMa
     }
     if (!attachmentsWithinLimit()) return
     const attachments = await Promise.all(files.map(fileToAttachment))
+    const to = splitEmails(toValue)
+    const cc = showCc ? splitEmails(ccValue) : []
+    const bcc = showBcc ? splitEmails(bccValue) : []
+    if (to.length === 0) {
+      toast({ title: "请填写收件人" })
+      return
+    }
     const payload: SendPayload & { draftId?: string; sendAt: string } = {
       mailboxId: senderMailbox.id,
-      to: splitEmails(toValue),
-      cc: showCc ? splitEmails(ccValue) : [],
-      bcc: showBcc ? splitEmails(bccValue) : [],
+      to,
+      cc,
+      bcc,
       subject: subjectValue,
       text: body.text,
       html: body.html || plainTextToHtml(body.text),
@@ -4085,15 +4175,45 @@ function ComposeDialog({ mailboxes, mailbox, open, draft, limits, canSend, canMa
       },
     })
   }
+
+  async function closeCompose() {
+    if (closing) return
+    if (!canManageDrafts || sendStartedRef.current || !hasDraftContent) {
+      onOpenChange(false)
+      return
+    }
+    setClosing(true)
+    setDraftStatus("saving")
+    try {
+      const attachments = await Promise.all(files.map(fileToAttachment))
+      const payload: DraftPayload = { ...composePayload, attachments }
+      const saved = await api.saveDraft(payload, draftId || undefined)
+      setDraftId(saved.id)
+      lastSavedPayloadRef.current = JSON.stringify({ ...payload, draftId: saved.id })
+      setLastSavedAt(new Date())
+      setDraftStatus("saved")
+      await Promise.all([
+        qc.invalidateQueries({ queryKey: ["messages"] }),
+        qc.invalidateQueries({ queryKey: ["folders"] }),
+        qc.invalidateQueries({ queryKey: ["mail-stats"] }),
+      ])
+      onOpenChange(false)
+    } catch (error) {
+      setDraftStatus("error")
+      toast({ title: "草稿保存失败", description: error instanceof Error ? error.message : "请稍后重试" })
+    } finally {
+      setClosing(false)
+    }
+  }
   return (
-    <Dialog open={open} onOpenChange={onOpenChange}>
+    <Dialog open={open} onOpenChange={(nextOpen) => { if (nextOpen) onOpenChange(true); else void closeCompose() }}>
       <DialogContent
-        className="flex h-svh w-screen max-w-none overflow-hidden p-0 sm:h-auto sm:max-h-[92vh] sm:w-[min(92vw,72rem)]"
+        className="flex h-svh w-screen max-w-none overflow-hidden p-0 sm:h-[min(88vh,48rem)] sm:w-[min(92vw,56rem)]"
         onInteractOutside={(event) => event.preventDefault()}
         onPointerDownOutside={(event) => event.preventDefault()}
       >
-        <form key={draft?.key || "new"} className="flex min-h-0 flex-1 flex-col sm:max-h-[90vh]" onSubmit={submit}>
-          <DialogHeader className="border-b px-4 py-3 text-left sm:px-6 sm:py-4">
+        <form key={draft?.key || "new"} className="flex min-h-0 min-w-0 flex-1 flex-col" onSubmit={submit}>
+          <DialogHeader className="border-b bg-muted/20 px-4 py-3 text-left sm:px-5">
             <DialogTitle className="flex min-w-0 flex-col gap-1 pr-8 sm:flex-row sm:items-center sm:justify-between sm:gap-4 sm:pr-6">
               <span>{draftId ? "编辑草稿" : "写信"}</span>
               <span className={cn("text-xs font-normal", draftStatus === "error" ? "text-destructive" : "text-muted-foreground")}>
@@ -4141,7 +4261,7 @@ function ComposeDialog({ mailboxes, mailbox, open, draft, limits, canSend, canMa
                 <Input name="bcc" placeholder="bcc@example.com" value={bccValue} onChange={(event) => setBccValue(event.target.value)} className="h-10 flex-1 rounded-none border-0 px-0 shadow-none focus-visible:ring-0" />
               </ComposeField>
             )}
-            <ComposeField label="主　题">
+            <ComposeField label="主题">
               <Input name="subject" placeholder="输入主题" value={subjectValue} onChange={(event) => setSubjectValue(event.target.value)} className="h-10 flex-1 rounded-none border-0 px-0 shadow-none focus-visible:ring-0" />
             </ComposeField>
             {defaultSignature.isError && (
@@ -4163,10 +4283,25 @@ function ComposeDialog({ mailboxes, mailbox, open, draft, limits, canSend, canMa
               onRemoveFile={(index) => { setAttachmentsTouched(true); setFiles((current) => current.filter((_, itemIndex) => itemIndex !== index)) }}
             />
           </div>
-          <DialogFooter className="grid grid-cols-3 gap-2 border-t bg-background px-4 py-3 sm:flex sm:flex-row sm:justify-end sm:px-6 sm:py-4">
-            <Button type="button" variant="outline" className="min-h-10 px-3" onClick={() => onOpenChange(false)}>取消</Button>
-            {canSchedule && <Button type="button" variant="outline" className="min-h-10 px-3" disabled={send.isPending || scheduleSend.isPending || !senderMailbox} onClick={() => setScheduleDialogOpen(true)}><Calendar className="h-4 w-4" />定时</Button>}
-            {canSend && <Button className="min-h-10 px-4" disabled={send.isPending || !senderMailbox}><Send className="h-4 w-4" />{send.isPending ? "发送中..." : "发送"}</Button>}
+          <DialogFooter className="flex flex-row items-center justify-between gap-3 border-t bg-muted/15 px-4 py-3 sm:px-5">
+            {canSend && (
+              <div className="flex min-w-0 items-center">
+                <Button className={cn("compose-send-button min-h-10 px-4", canSchedule && "rounded-r-none")} disabled={send.isPending || !senderMailbox}><Send className="h-4 w-4" />{send.isPending ? "发送中..." : "发送"}</Button>
+                {canSchedule && (
+                  <DropdownMenu>
+                    <DropdownMenuTrigger asChild>
+                      <Button type="button" size="icon" className="compose-send-button h-10 w-9 shrink-0 rounded-l-none border-l border-white/30 px-0" title="发送选项" aria-label="发送选项" disabled={send.isPending || scheduleSend.isPending || !senderMailbox}>
+                        <ChevronDown className="h-4 w-4" />
+                      </Button>
+                    </DropdownMenuTrigger>
+                    <DropdownMenuContent align="end" side="top" sideOffset={8} collisionPadding={12} className="w-[120px] min-w-[120px]">
+                      <DropdownMenuItem className={composerMenuItemClass} onSelect={() => setScheduleDialogOpen(true)}><Clock3 className="h-4 w-4" />定时发送</DropdownMenuItem>
+                    </DropdownMenuContent>
+                  </DropdownMenu>
+                )}
+              </div>
+            )}
+            <Button type="button" variant="ghost" className="min-h-10 px-3" disabled={closing} onClick={() => { void closeCompose() }}>{closing ? "保存中..." : "取消"}</Button>
           </DialogFooter>
         </form>
         <ScheduleSendDialog open={scheduleDialogOpen} pending={scheduleSend.isPending} onOpenChange={setScheduleDialogOpen} onConfirm={scheduleAt} />
@@ -4186,8 +4321,8 @@ function ComposeDialog({ mailboxes, mailbox, open, draft, limits, canSend, canMa
 
 function ComposeField({ label, children, action }: { label: string; children: React.ReactNode; action?: React.ReactNode }) {
   return (
-    <div className="flex min-h-14 flex-col gap-2 border-b px-4 py-2 sm:flex-row sm:items-center sm:px-6">
-      <Label className="shrink-0 text-base font-normal text-foreground sm:w-20">{label}</Label>
+    <div className="flex min-h-12 flex-col gap-1 border-b px-4 py-1.5 transition-colors focus-within:bg-muted/20 sm:flex-row sm:items-center sm:gap-2 sm:px-5">
+      <Label className="shrink-0 text-sm font-normal text-muted-foreground sm:w-16">{label}</Label>
       <div className="flex min-w-0 flex-1 flex-col gap-2 sm:flex-row sm:items-center">
         {children}
         {action}
@@ -4259,11 +4394,17 @@ type InsertDialogValue = { url: string; text: string; alt: string }
 const composerFontOptions = ["Arial", "Georgia", "Times New Roman", "Courier New", "Microsoft YaHei"]
 const composerFontSizeOptions = [
   ["2", "小号"],
-  ["3", "正文"],
+  ["3", "标准"],
   ["4", "中号"],
   ["5", "大号"],
 ] as const
 const composerFontSizeValueByKey: Record<string, string> = { "2": "13px", "3": "16px", "4": "20px", "5": "24px" }
+const composerParagraphOptions: ReadonlyArray<{ key: string; label: string; level?: 1 | 2 | 3 }> = [
+  { key: "paragraph", label: "正文" },
+  { key: "heading-1", label: "标题 1", level: 1 as const },
+  { key: "heading-2", label: "标题 2", level: 2 as const },
+  { key: "heading-3", label: "标题 3", level: 3 as const },
+] as const
 const composerTextColors = [["#111827", "默认"], ["#dc2626", "红色"], ["#2563eb", "蓝色"], ["#16a34a", "绿色"], ["#9333ea", "紫色"]] as const
 const composerHighlightColors = [["transparent", "无高亮"], ["#fef3c7", "黄色"], ["#dcfce7", "绿色"], ["#dbeafe", "蓝色"], ["#fce7f3", "粉色"]] as const
 const composerEmojiOptions = ["😀", "😄", "😊", "🙂", "😉", "😍", "😘", "😎", "🤔", "👍", "👏", "🙏", "💪", "🎉", "🔥", "✨", "❤️", "✅", "📌", "📅", "☕", "💡", "🚀", "⭐"]
@@ -4305,7 +4446,15 @@ function fontLabel(value: string) {
 
 function fontSizeLabel(value: string) {
   const normalized = normalizeFontSize(value) || "3"
-  return composerFontSizeOptions.find(([size]) => size === normalized)?.[1] || "正文"
+  return composerFontSizeOptions.find(([size]) => size === normalized)?.[1] || "标准"
+}
+
+function paragraphStyleLabel(editor?: Editor | null) {
+  if (!editor) return "正文"
+  for (const option of composerParagraphOptions) {
+    if (option.level && editor.isActive("heading", { level: option.level })) return option.label
+  }
+  return "正文"
 }
 
 function normalizeInsertUrl(value: string, kind: InsertDialogState["kind"]) {
@@ -4431,8 +4580,10 @@ function MailBodyComposer({ defaultValue, defaultHtml, files, signatureText, max
     content: composerInitialHtml(defaultValue, defaultHtml),
     editorProps: {
       attributes: {
-        class: "mail-html min-h-[240px] min-w-0 flex-1 overflow-y-auto px-4 py-4 text-base leading-7 outline-none sm:min-h-[280px] sm:px-6 sm:py-5",
+        class: "mail-html min-h-[220px] min-w-0 flex-1 overflow-y-auto px-4 py-4 text-base leading-7 outline-none sm:min-h-[260px] sm:px-5",
         "aria-label": "正文",
+        spellcheck: "true",
+        autocorrect: "on",
       },
       handlePaste(view, event) {
         const clipboard = event.clipboardData
@@ -4486,6 +4637,7 @@ function MailBodyComposer({ defaultValue, defaultHtml, files, signatureText, max
   const activeFontSize = normalizeFontSize(textStyleAttributes?.fontSize || "") || "3"
   const activeColor = textStyleAttributes?.color || ""
   const activeHighlight = textStyleAttributes?.backgroundColor || ""
+  const characterCount = editor?.getText().replace(/\s/g, "").length || 0
   void selectionVersion
 
   function applyFont(font: string) {
@@ -4553,9 +4705,9 @@ function MailBodyComposer({ defaultValue, defaultHtml, files, signatureText, max
   }
 
   return (
-    <div className="flex min-h-[330px] flex-1 flex-col bg-background sm:min-h-[420px]">
+    <div className="flex min-h-[300px] min-w-0 flex-1 flex-col bg-background sm:min-h-[360px]">
       <Input ref={fileInputRef} type="file" multiple className="hidden" onChange={handlePickedFiles} />
-      <div className="flex min-h-11 flex-wrap items-center gap-1 overflow-visible border-b px-3 py-2 sm:px-6">
+      <div className="flex min-h-11 flex-wrap items-center gap-1 overflow-visible border-b px-3 py-2 sm:px-5">
         <ToolbarButton label="撤销" disabled={!editor?.can().undo()} onClick={() => editor?.chain().focus().undo().run()}><Undo2 className="h-4 w-4" /></ToolbarButton>
         <ToolbarButton label="重做" disabled={!editor?.can().redo()} onClick={() => editor?.chain().focus().redo().run()}><Redo2 className="h-4 w-4" /></ToolbarButton>
         <Separator orientation="vertical" className="mx-2 h-6" />
@@ -4572,7 +4724,7 @@ function MailBodyComposer({ defaultValue, defaultHtml, files, signatureText, max
             <DropdownMenuItem className={composerMenuItemClass} onSelect={() => editor?.chain().focus().setHorizontalRule().run()}><span className="h-4 w-4 border-t border-current" aria-hidden />分隔线</DropdownMenuItem>
           </DropdownMenuContent>
         </DropdownMenu>
-        <span className="rounded-md border px-2 py-1 text-xs text-muted-foreground">附件 {maxAttachmentText}</span>
+        <span className="px-1 text-xs text-muted-foreground" title={`单个附件上限 ${maxAttachmentText}`}>附件上限 {maxAttachmentText}</span>
         <ToolbarTextButton label="日程" icon={<Calendar className="h-4 w-4" />} onClick={() => setScheduleOpen(true)} />
         <DropdownMenu open={emojiOpen} onOpenChange={setEmojiOpen}>
           <DropdownMenuTrigger asChild>
@@ -4597,9 +4749,24 @@ function MailBodyComposer({ defaultValue, defaultHtml, files, signatureText, max
         </div>
       </div>
       {formatOpen && (
-        <div className="flex min-h-14 flex-wrap items-center gap-1 overflow-visible border-b bg-muted/40 px-3 py-2 sm:px-6">
+        <div className="flex min-h-14 flex-wrap items-center gap-1 overflow-visible border-b bg-muted/40 px-3 py-2 sm:px-5">
           <ToolbarButton label="清除格式" disabled={!editor} onClick={() => editor?.chain().focus().unsetAllMarks().clearNodes().run()}><Eraser className="h-4 w-4" /></ToolbarButton>
-          <Separator orientation="vertical" className="mx-2 h-6" />
+          <Separator orientation="vertical" className="mx-1 h-6" />
+          <DropdownMenu>
+            <DropdownMenuTrigger asChild>
+              <Button type="button" variant="ghost" size="sm" className={cn("h-8 min-w-[76px] justify-between rounded-md border border-transparent px-2 font-normal hover:border-border hover:bg-accent", paragraphStyleLabel(editor) !== "正文" && "border-primary/35 bg-primary/10 text-primary")} onMouseDown={(event) => event.preventDefault()} disabled={!editor}>
+                {paragraphStyleLabel(editor)}<ChevronDown className="h-3.5 w-3.5" />
+              </Button>
+            </DropdownMenuTrigger>
+            <DropdownMenuContent align="start">
+              {composerParagraphOptions.map((option) => (
+                <DropdownMenuItem key={option.key} className={composerMenuItemClass} onSelect={() => option.level ? editor?.chain().focus().toggleHeading({ level: option.level }).run() : editor?.chain().focus().setParagraph().run()}>
+                  <Check className={cn("h-4 w-4", paragraphStyleLabel(editor) === option.label ? "opacity-100" : "opacity-0")} />
+                  <span className={cn(option.level === 1 && "text-lg font-semibold", option.level === 2 && "text-base font-semibold", option.level === 3 && "text-sm font-semibold")}>{option.label}</span>
+                </DropdownMenuItem>
+              ))}
+            </DropdownMenuContent>
+          </DropdownMenu>
           <DropdownMenu>
             <DropdownMenuTrigger asChild>
               <Button type="button" variant="ghost" size="sm" className={cn("h-8 min-w-[112px] justify-between rounded-md border border-transparent px-2 font-normal hover:border-border hover:bg-accent hover:shadow-sm", activeFont && "border-primary/35 bg-primary/10 text-primary shadow-sm")} onMouseDown={(event) => event.preventDefault()} disabled={!editor}>
@@ -4630,7 +4797,7 @@ function MailBodyComposer({ defaultValue, defaultHtml, files, signatureText, max
               ))}
             </DropdownMenuContent>
           </DropdownMenu>
-          <Separator orientation="vertical" className="mx-2 h-6" />
+          <Separator orientation="vertical" className="mx-1 h-6" />
           <ToolbarButton label="加粗" active={editor?.isActive("bold")} disabled={!editor} onClick={() => editor?.chain().focus().toggleBold().run()}><Bold className="h-4 w-4" /></ToolbarButton>
           <ToolbarButton label="斜体" active={editor?.isActive("italic")} disabled={!editor} onClick={() => editor?.chain().focus().toggleItalic().run()}><Italic className="h-4 w-4" /></ToolbarButton>
           <ToolbarButton label="下划线" active={editor?.isActive("underline")} disabled={!editor} onClick={() => editor?.chain().focus().toggleUnderline().run()}><Underline className="h-4 w-4" /></ToolbarButton>
@@ -4665,30 +4832,39 @@ function MailBodyComposer({ defaultValue, defaultHtml, files, signatureText, max
               ))}
             </DropdownMenuContent>
           </DropdownMenu>
-          <Separator orientation="vertical" className="mx-2 h-6" />
+          <Separator orientation="vertical" className="mx-1 h-6" />
           <ToolbarButton label="无序列表" active={editor?.isActive("bulletList")} disabled={!editor} onClick={() => editor?.chain().focus().toggleBulletList().run()}><List className="h-4 w-4" /></ToolbarButton>
           <ToolbarButton label="有序列表" active={editor?.isActive("orderedList")} disabled={!editor} onClick={() => editor?.chain().focus().toggleOrderedList().run()}><ListOrdered className="h-4 w-4" /></ToolbarButton>
-          <ToolbarButton label="减少缩进" disabled={!editor?.can().liftListItem("listItem")} onClick={() => editor?.chain().focus().liftListItem("listItem").run()}><IndentDecrease className="h-4 w-4" /></ToolbarButton>
-          <ToolbarButton label="增加缩进" disabled={!editor?.can().sinkListItem("listItem")} onClick={() => editor?.chain().focus().sinkListItem("listItem").run()}><IndentIncrease className="h-4 w-4" /></ToolbarButton>
-          <Separator orientation="vertical" className="mx-2 h-6" />
-          <ToolbarButton label="左对齐" active={editor?.isActive({ textAlign: "left" })} disabled={!editor} onClick={() => editor?.chain().focus().setTextAlign("left").run()}><AlignLeft className="h-4 w-4" /></ToolbarButton>
-          <ToolbarButton label="居中" active={editor?.isActive({ textAlign: "center" })} disabled={!editor} onClick={() => editor?.chain().focus().setTextAlign("center").run()}><AlignCenter className="h-4 w-4" /></ToolbarButton>
-          <ToolbarButton label="右对齐" active={editor?.isActive({ textAlign: "right" })} disabled={!editor} onClick={() => editor?.chain().focus().setTextAlign("right").run()}><AlignRight className="h-4 w-4" /></ToolbarButton>
-          <ToolbarButton label="引用" active={editor?.isActive("blockquote")} disabled={!editor} onClick={() => editor?.chain().focus().toggleBlockquote().run()}><Quote className="h-4 w-4" /></ToolbarButton>
-          <ToolbarButton label="代码块" active={editor?.isActive("codeBlock")} disabled={!editor} onClick={() => editor?.chain().focus().toggleCodeBlock().run()}><Code2 className="h-4 w-4" /></ToolbarButton>
+          <DropdownMenu>
+            <DropdownMenuTrigger asChild>
+              <Button type="button" variant="ghost" size="icon" className="h-8 w-8 rounded-md text-muted-foreground hover:bg-accent hover:text-foreground" title="更多格式" aria-label="更多格式" onMouseDown={(event) => event.preventDefault()} disabled={!editor}>
+                <Ellipsis className="h-4 w-4" />
+              </Button>
+            </DropdownMenuTrigger>
+            <DropdownMenuContent align="end" className="w-44">
+              <DropdownMenuItem className={composerMenuItemClass} disabled={!editor?.can().liftListItem("listItem")} onSelect={() => editor?.chain().focus().liftListItem("listItem").run()}><IndentDecrease className="h-4 w-4" />减少缩进</DropdownMenuItem>
+              <DropdownMenuItem className={composerMenuItemClass} disabled={!editor?.can().sinkListItem("listItem")} onSelect={() => editor?.chain().focus().sinkListItem("listItem").run()}><IndentIncrease className="h-4 w-4" />增加缩进</DropdownMenuItem>
+              <DropdownMenuItem className={composerMenuItemClass} onSelect={() => editor?.chain().focus().setTextAlign("left").run()}><AlignLeft className="h-4 w-4" />左对齐</DropdownMenuItem>
+              <DropdownMenuItem className={composerMenuItemClass} onSelect={() => editor?.chain().focus().setTextAlign("center").run()}><AlignCenter className="h-4 w-4" />居中</DropdownMenuItem>
+              <DropdownMenuItem className={composerMenuItemClass} onSelect={() => editor?.chain().focus().setTextAlign("right").run()}><AlignRight className="h-4 w-4" />右对齐</DropdownMenuItem>
+              <DropdownMenuItem className={composerMenuItemClass} onSelect={() => editor?.chain().focus().toggleBlockquote().run()}><Quote className="h-4 w-4" />引用</DropdownMenuItem>
+              <DropdownMenuItem className={composerMenuItemClass} onSelect={() => editor?.chain().focus().toggleCodeBlock().run()}><Code2 className="h-4 w-4" />代码块</DropdownMenuItem>
+            </DropdownMenuContent>
+          </DropdownMenu>
+          <span className="ml-auto whitespace-nowrap px-1 text-xs tabular-nums text-muted-foreground" aria-live="polite">{characterCount} 字</span>
         </div>
       )}
       <div className={cn(
-        "composer-editor relative flex min-h-[240px] flex-1 border-b focus-within:bg-card/40 sm:min-h-[280px]",
-        "[&_.ProseMirror]:min-h-[240px] [&_.ProseMirror]:w-full [&_.ProseMirror]:flex-1 [&_.ProseMirror]:overflow-y-auto [&_.ProseMirror]:px-4 [&_.ProseMirror]:py-4 [&_.ProseMirror]:text-base [&_.ProseMirror]:leading-7 [&_.ProseMirror]:outline-none sm:[&_.ProseMirror]:min-h-[280px] sm:[&_.ProseMirror]:px-6 sm:[&_.ProseMirror]:py-5",
+        "composer-editor relative flex min-h-[220px] min-w-0 flex-1 overflow-hidden border-b focus-within:bg-card/40 sm:min-h-[260px]",
+        "[&_.ProseMirror]:min-h-[220px] [&_.ProseMirror]:min-w-0 [&_.ProseMirror]:w-full [&_.ProseMirror]:max-w-full [&_.ProseMirror]:flex-1 [&_.ProseMirror]:overflow-x-hidden [&_.ProseMirror]:overflow-y-auto [&_.ProseMirror]:px-4 [&_.ProseMirror]:py-4 [&_.ProseMirror]:text-base [&_.ProseMirror]:leading-7 [&_.ProseMirror]:outline-none [&_.ProseMirror]:[overflow-wrap:anywhere] sm:[&_.ProseMirror]:min-h-[260px] sm:[&_.ProseMirror]:px-5",
         "[&_.ProseMirror_p.is-editor-empty:first-child::before]:pointer-events-none [&_.ProseMirror_p.is-editor-empty:first-child::before]:float-left [&_.ProseMirror_p.is-editor-empty:first-child::before]:h-0 [&_.ProseMirror_p.is-editor-empty:first-child::before]:text-muted-foreground [&_.ProseMirror_p.is-editor-empty:first-child::before]:content-[attr(data-placeholder)]",
-        "[&_.ProseMirror_ul]:list-disc [&_.ProseMirror_ol]:list-decimal [&_.ProseMirror_ul]:pl-6 [&_.ProseMirror_ol]:pl-6 [&_.ProseMirror_blockquote]:border-l-4 [&_.ProseMirror_blockquote]:border-border [&_.ProseMirror_blockquote]:pl-4 [&_.ProseMirror_blockquote]:text-muted-foreground [&_.ProseMirror_pre]:rounded-md [&_.ProseMirror_pre]:bg-muted [&_.ProseMirror_pre]:p-3",
+        "[&_.ProseMirror_a]:break-all [&_.ProseMirror_p]:max-w-full [&_.ProseMirror_ul]:list-disc [&_.ProseMirror_ol]:list-decimal [&_.ProseMirror_ul]:pl-6 [&_.ProseMirror_ol]:pl-6 [&_.ProseMirror_blockquote]:border-l-4 [&_.ProseMirror_blockquote]:border-border [&_.ProseMirror_blockquote]:pl-4 [&_.ProseMirror_blockquote]:text-muted-foreground [&_.ProseMirror_pre]:max-w-full [&_.ProseMirror_pre]:whitespace-pre-wrap [&_.ProseMirror_pre]:break-words [&_.ProseMirror_pre]:rounded-md [&_.ProseMirror_pre]:bg-muted [&_.ProseMirror_pre]:p-3",
         empty && "bg-background"
       )}>
-        <EditorContent editor={editor} className="flex min-h-0 flex-1" />
+        <EditorContent editor={editor} className="flex min-h-0 min-w-0 flex-1 overflow-hidden" />
       </div>
       {files.length > 0 && (
-        <div className="border-t px-4 py-3 sm:px-6">
+        <div className="border-t px-4 py-3 sm:px-5">
           <div className="flex flex-wrap gap-2">
             {files.map((file, index) => (
               <Badge key={`${file.name}-${file.size}-${index}`} variant="outline" className="h-8 gap-2 rounded-md px-2 font-normal">
@@ -4710,7 +4886,7 @@ function MailBodyComposer({ defaultValue, defaultHtml, files, signatureText, max
           <DialogHeader>
             <DialogTitle>邮件预览</DialogTitle>
           </DialogHeader>
-          <div className="mail-html max-h-[60vh] overflow-y-auto rounded-md border bg-background p-5 text-sm leading-7" dangerouslySetInnerHTML={{ __html: sanitizeComposerHtml(editor?.getHTML() || "") || "<p></p>" }} />
+          <div className="mail-html max-h-[60vh] max-w-full overflow-x-hidden overflow-y-auto rounded-md border bg-background p-5 text-sm leading-7 [overflow-wrap:anywhere] [&_a]:break-all [&_pre]:max-w-full [&_pre]:whitespace-pre-wrap [&_pre]:break-words" dangerouslySetInnerHTML={{ __html: sanitizeComposerHtml(editor?.getHTML() || "") || "<p></p>" }} />
         </DialogContent>
       </Dialog>
     </div>

apps/web/src/pages/profile.tsx

@@ -693,8 +693,8 @@ function SettingsCard({ title, subtitle, action, children, className, contentCla
     <section className={cn("rounded-lg border bg-card shadow-[0_1px_2px_rgba(15,23,42,0.04)]", className)}>
       <div className="flex flex-col gap-3 px-6 py-4 sm:flex-row sm:items-start sm:justify-between">
         <div className="min-w-0">
-          <h2 className="text-[15px] font-semibold leading-6 text-foreground">{title}</h2>
-          {subtitle && <p className="mt-0.5 text-xs leading-5 text-muted-foreground">{subtitle}</p>}
+          <h2 className="break-words text-[15px] font-semibold leading-6 text-foreground [overflow-wrap:anywhere]">{title}</h2>
+          {subtitle && <p className="mt-0.5 break-words text-xs leading-5 text-muted-foreground [overflow-wrap:anywhere]">{subtitle}</p>}
         </div>
         {action && <div className="w-full shrink-0 sm:w-auto sm:justify-end [&>a]:w-full [&>button]:w-full sm:[&>a]:w-auto sm:[&>button]:w-auto">{action}</div>}
       </div>
@@ -1626,7 +1626,7 @@ function ExternalImapDialog({ account, mailboxId, disabled, pending, onSubmit }:
   return (
     <Dialog open={open} onOpenChange={setOpen}>
       <Button type="button" variant={account ? "outline" : "default"} size={account ? "sm" : "default"} disabled={disabled} onClick={() => setOpen(true)}>
-        {account ? "编辑" : <><Plus className="h-4 w-4" />添加外部邮箱</>}
+        {account ? "编辑" : "添加外部邮箱"}
       </Button>
       <DialogContent className="max-h-[92dvh] overflow-y-auto sm:max-w-xl">
         <DialogHeader><DialogTitle>{account ? "编辑外部 IMAP" : "添加外部 IMAP"}</DialogTitle></DialogHeader>
@@ -2221,16 +2221,13 @@ function CleanupSection({ mailbox, stats, showStats, pending, onCleanup }: { mai
     })
   }
   return (
-    <div className="space-y-6">
+    <div className="space-y-4">
       {showStats && <StatsSummary stats={stats} />}
-      <Card>
-        <CardHeader><CardTitle>清理当前邮箱</CardTitle></CardHeader>
-        <CardContent className="grid gap-3 md:grid-cols-3">
+      <SettingsCard title="清理当前邮箱" subtitle={mailbox ? `当前邮箱：${mailbox.address}` : "请先选择邮箱"} contentClassName="grid gap-3 sm:grid-cols-2 lg:grid-cols-3">
           <CleanupButton icon={<MailCheck className="h-4 w-4" />} title="归档已读收件箱" disabled={!mailbox || pending} onClick={() => confirmCleanup("archive-read-inbox", "归档已读收件箱？")} />
           <CleanupButton icon={<MailX className="h-4 w-4" />} title="清空垃圾邮件" disabled={!mailbox || pending} onClick={() => confirmCleanup("empty-spam", "清空垃圾邮件？", true)} />
           <CleanupButton icon={<Trash2 className="h-4 w-4" />} title="清空回收站" disabled={!mailbox || pending} onClick={() => confirmCleanup("empty-trash", "清空回收站？", true)} />
-        </CardContent>
-      </Card>
+      </SettingsCard>
       <ConfirmDialog open={!!pendingConfirm} title={pendingConfirm?.title || ""} description={pendingConfirm?.description} confirmText={pendingConfirm?.confirmText || "确认"} destructive={!!pendingConfirm?.destructive} pending={pending} onOpenChange={(open) => { if (!open) setPendingConfirm(null) }} onConfirm={() => pendingConfirm?.onConfirm()} />
     </div>
   )
@@ -2261,6 +2258,9 @@ const ruleActionLabels: Record<MailRuleAction["type"], string> = { archive: "移
 
 function RulesSection({ items, mailboxes, labels, verifiedEmails, open, onOpenChange, onCreate, onUpdate, onToggle, onMove, onApply, onDelete, pending }: { items: MailRule[]; mailboxes: Mailbox[]; labels: MailLabel[]; verifiedEmails: string[]; open: boolean; onOpenChange: (open: boolean) => void; onCreate: (payload: RuleCreatePayload) => void; onUpdate: (id: string, payload: RuleCreatePayload) => void; onToggle: (item: MailRule) => void; onMove: (id: string, direction: "up" | "down") => void; onApply: (id: string) => void; onDelete: (id: string) => void; pending: boolean }) {
   const [editingRule, setEditingRule] = React.useState<MailRule | null>(null)
+  const [query, setQuery] = React.useState("")
+  const normalizedQuery = query.trim().toLocaleLowerCase()
+  const filteredItems = items.map((item, index) => ({ item, index })).filter(({ item }) => !normalizedQuery || item.name.toLocaleLowerCase().includes(normalizedQuery))
 
   function setDialogOpen(next: boolean) {
     if (!next) setEditingRule(null)
@@ -2269,12 +2269,18 @@ function RulesSection({ items, mailboxes, labels, verifiedEmails, open, onOpenCh
 
   return (
     <div className="space-y-4">
-      <div className="flex justify-stretch sm:justify-end">
-        <Button className="h-9 w-full rounded-md px-4 text-sm font-normal sm:w-auto" onClick={() => { setEditingRule(null); onOpenChange(true) }}>新建规则</Button>
+      <div className="grid grid-cols-[minmax(0,1fr)_auto] items-center gap-2">
+        <div className="relative min-w-0">
+          <Search className="pointer-events-none absolute left-3 top-1/2 h-4 w-4 -translate-y-1/2 text-muted-foreground" />
+          <Input value={query} onChange={(event) => setQuery(event.target.value)} placeholder="搜索规则名称" aria-label="搜索规则" className="h-10 pl-9 pr-10" />
+          {query && <Button type="button" variant="ghost" size="icon" className="absolute right-1 top-1 size-8 text-muted-foreground" onClick={() => setQuery("")} aria-label="清除规则搜索" title="清除搜索"><X className="h-4 w-4" /></Button>}
+        </div>
+        <Button className="h-10 shrink-0 rounded-md px-3 text-sm font-normal sm:px-4" onClick={() => { setEditingRule(null); onOpenChange(true) }}>新建规则</Button>
       </div>
       <div className="space-y-3">
-        {items.map((item, index) => <RuleListItem key={item.id} item={item} index={index} count={items.length} mailboxLabel={item.mailboxId ? mailboxes.find((mailbox) => mailbox.id === item.mailboxId)?.address || "指定邮箱" : "全部邮箱"} pending={pending} onEdit={() => { setEditingRule(item); onOpenChange(true) }} onToggle={() => onToggle(item)} onMove={(direction) => onMove(item.id, direction)} onApply={() => onApply(item.id)} onDelete={onDelete} />)}
+        {filteredItems.map(({ item, index }) => <RuleListItem key={item.id} item={item} index={index} count={items.length} mailboxLabel={item.mailboxId ? mailboxes.find((mailbox) => mailbox.id === item.mailboxId)?.address || "指定邮箱" : "全部邮箱"} pending={pending} onEdit={() => { setEditingRule(item); onOpenChange(true) }} onToggle={() => onToggle(item)} onMove={(direction) => onMove(item.id, direction)} onApply={() => onApply(item.id)} onDelete={onDelete} />)}
         {items.length === 0 && <EmptyState icon={<SlidersHorizontal />} text="暂无收件规则" description="新建规则后，可自动标记、移动或转发符合条件的邮件。" className="min-h-[180px] border-solid bg-card" />}
+        {items.length > 0 && filteredItems.length === 0 && <EmptyState icon={<Search />} text="没有找到规则" description={`没有名称包含“${query.trim()}”的规则。`} className="min-h-[180px] border-solid bg-card" />}
       </div>
       <RuleDialog open={open} onOpenChange={setDialogOpen} mailboxes={mailboxes} labels={labels} verifiedEmails={verifiedEmails} pending={pending} initialRule={editingRule} onSave={(payload) => editingRule ? onUpdate(editingRule.id, payload) : onCreate(payload)} />
     </div>
@@ -2349,10 +2355,10 @@ function RuleDialog({ open, onOpenChange, mailboxes, labels, verifiedEmails, pen
             <Field label="适用邮箱"><MailboxSelect value={mailboxId} mailboxes={mailboxes} onChange={setMailboxId} /></Field>
 
             <div className="space-y-4">
-              <div className="flex flex-wrap items-center gap-3 text-sm">
-                <span>当新邮件到达时，满足以下</span>
+              <div className="space-y-2 text-sm">
+                <div>当新邮件到达时，满足以下</div>
                 <Select value={matchMode} onValueChange={(value) => setMatchMode(value as "all" | "any")}>
-                  <SelectTrigger className="h-9 w-[132px]"><SelectValue /></SelectTrigger>
+                  <SelectTrigger className="h-11 w-full md:h-9 md:w-[180px]"><SelectValue /></SelectTrigger>
                   <SelectContent><SelectItem value="all">所有条件</SelectItem><SelectItem value="any">任一条件</SelectItem></SelectContent>
                 </Select>
               </div>
@@ -2487,26 +2493,26 @@ function RuleListItem({ item, index, count, mailboxLabel, pending, onEdit, onTog
   const conditionText = ruleConditionSummary(item.conditions, item.fromContains, item.subjectContains)
   const actionText = item.actions.map(ruleActionSummary).filter(Boolean).join("；") || "无动作"
   return (
-    <div className="grid min-h-[110px] grid-cols-[minmax(0,1fr)_auto] items-center gap-3 rounded-lg border bg-card px-4 py-4 transition-colors hover:bg-muted/20">
-      <div className="min-w-0 space-y-1">
-        <div className="flex min-w-0 items-center gap-2 leading-6">
-          <h3 className="truncate text-base font-semibold text-foreground">{item.name}</h3>
+    <div className="grid min-h-[110px] grid-cols-1 gap-3 rounded-lg border bg-card px-4 py-4 transition-colors hover:bg-muted/20 sm:grid-cols-[minmax(0,1fr)_auto] sm:items-center">
+      <div className="min-w-0 space-y-2 sm:space-y-1">
+        <div className="flex min-w-0 items-start gap-2 leading-6 sm:items-center">
+          <h3 className="min-w-0 flex-1 break-words text-base font-semibold text-foreground [overflow-wrap:anywhere] sm:truncate">{item.name}</h3>
           <span className={cn("shrink-0 rounded bg-emerald-100 px-1.5 py-0.5 text-xs font-medium", item.enabled ? "text-emerald-700" : "bg-muted text-muted-foreground")}>{item.enabled ? "已启用" : "已停用"}</span>
         </div>
-        <div className="grid text-sm leading-6 text-muted-foreground">
-          <p className="truncate"><span className="text-muted-foreground">适用：</span> {mailboxLabel}</p>
-          <p className="truncate"><span className="text-muted-foreground">条件：</span> {conditionText}</p>
-          <p className="truncate"><span className="text-muted-foreground">动作：</span> {actionText}</p>
+        <div className="grid gap-1 text-sm leading-5 text-muted-foreground sm:gap-0 sm:leading-6">
+          <p className="flex min-w-0 items-start gap-1"><span className="shrink-0">适用：</span><span className="min-w-0 break-words [overflow-wrap:anywhere] sm:truncate">{mailboxLabel}</span></p>
+          <p className="flex min-w-0 items-start gap-1"><span className="shrink-0">条件：</span><span className="min-w-0 break-words [overflow-wrap:anywhere] sm:truncate">{conditionText}</span></p>
+          <p className="flex min-w-0 items-start gap-1"><span className="shrink-0">动作：</span><span className="min-w-0 break-words [overflow-wrap:anywhere] sm:truncate">{actionText}</span></p>
         </div>
       </div>
-      <div className="flex shrink-0 items-center gap-1">
-        <Button type="button" variant="ghost" size="icon" className="size-7 text-muted-foreground" disabled={pending || index === 0} onClick={() => onMove("up")} aria-label="上移" title="上移"><ChevronUp className="h-4 w-4" /></Button>
-        <Button type="button" variant="ghost" size="icon" className="size-7 text-muted-foreground" disabled={pending || index === count - 1} onClick={() => onMove("down")} aria-label="下移" title="下移"><ChevronDown className="h-4 w-4" /></Button>
+      <div className="flex shrink-0 items-center justify-end gap-1 border-t pt-3 sm:border-t-0 sm:pt-0">
+        <Button type="button" variant="ghost" size="icon" className="size-9 text-muted-foreground sm:size-7" disabled={pending || index === 0} onClick={() => onMove("up")} aria-label="上移" title="上移"><ChevronUp className="h-4 w-4" /></Button>
+        <Button type="button" variant="ghost" size="icon" className="size-9 text-muted-foreground sm:size-7" disabled={pending || index === count - 1} onClick={() => onMove("down")} aria-label="下移" title="下移"><ChevronDown className="h-4 w-4" /></Button>
         <span className="mx-1 h-6 w-px bg-border" />
-        <Button type="button" variant="ghost" size="icon" className={cn("size-7", item.enabled ? "text-emerald-600" : "text-muted-foreground")} disabled={pending} onClick={onToggle} aria-label={item.enabled ? "禁用规则" : "启用规则"} title={item.enabled ? "禁用规则" : "启用规则"}>{item.enabled ? <Bell className="h-4 w-4" /> : <BellOff className="h-4 w-4" />}</Button>
-        <Button type="button" variant="ghost" size="icon" className="size-7 text-muted-foreground" disabled={pending} onClick={onEdit} aria-label="编辑规则" title="编辑规则"><PencilLine className="h-4 w-4" /></Button>
-        <Button type="button" variant="ghost" size="icon" className="size-7 text-muted-foreground" disabled={pending} onClick={onApply} aria-label="应用到现有邮件" title="应用到现有邮件"><PlayCircle className="h-4 w-4" /></Button>
-        <Button variant="ghost" size="icon" className="size-7 shrink-0 text-destructive hover:bg-destructive/10 hover:text-destructive" disabled={pending} onClick={() => setConfirmOpen(true)} aria-label="删除规则" title="删除规则"><Trash2 className="h-4 w-4" /></Button>
+        <Button type="button" variant="ghost" size="icon" className={cn("size-9 sm:size-7", item.enabled ? "text-emerald-600" : "text-muted-foreground")} disabled={pending} onClick={onToggle} aria-label={item.enabled ? "禁用规则" : "启用规则"} title={item.enabled ? "禁用规则" : "启用规则"}>{item.enabled ? <Bell className="h-4 w-4" /> : <BellOff className="h-4 w-4" />}</Button>
+        <Button type="button" variant="ghost" size="icon" className="size-9 text-muted-foreground sm:size-7" disabled={pending} onClick={onEdit} aria-label="编辑规则" title="编辑规则"><PencilLine className="h-4 w-4" /></Button>
+        <Button type="button" variant="ghost" size="icon" className="size-9 text-muted-foreground sm:size-7" disabled={pending} onClick={onApply} aria-label="应用到现有邮件" title="应用到现有邮件"><PlayCircle className="h-4 w-4" /></Button>
+        <Button variant="ghost" size="icon" className="size-9 shrink-0 text-destructive hover:bg-destructive/10 hover:text-destructive sm:size-7" disabled={pending} onClick={() => setConfirmOpen(true)} aria-label="删除规则" title="删除规则"><Trash2 className="h-4 w-4" /></Button>
       </div>
       <ConfirmDialog open={confirmOpen} title="删除收件规则？" description={`规则“${item.name}”将不再处理后续邮件。`} confirmText="删除规则" destructive onOpenChange={setConfirmOpen} onConfirm={() => { onDelete(item.id); setConfirmOpen(false) }} />
     </div>
@@ -2577,17 +2583,18 @@ function BlockedSection({ items, mailboxes, mailboxId, spamCount, onMailboxChang
     setDialogOpen(false)
   }
   return (
-    <div className="space-y-4">
-      <div className="flex flex-col gap-3 sm:flex-row sm:items-center sm:justify-between">
-        <div className="text-xs font-medium text-muted-foreground">共 {spamCount} 封垃圾邮件 · {items.length} 条发件人拦截规则</div>
-        <Button type="button" className="w-full sm:w-auto" onClick={() => setDialogOpen(true)}><Plus className="h-4 w-4" />新增拦截</Button>
-      </div>
-      <SettingsCard title="被拦截邮件" subtitle="发件人命中拦截规则后会进入垃圾邮件，规则可随时移除。" contentClassName="space-y-2">
+    <div>
+      <SettingsCard
+        title="拦截规则"
+        subtitle={`共 ${items.length} 条发件人规则 · 垃圾邮件 ${spamCount} 封`}
+        action={<Button type="button" onClick={() => setDialogOpen(true)}>新增拦截</Button>}
+        contentClassName="space-y-2"
+      >
         {items.map((item) => (
-          <div key={item.id} className="flex items-center justify-between gap-3 rounded-lg border bg-background p-3 transition-colors hover:bg-muted/40">
+          <div key={item.id} className="grid grid-cols-[minmax(0,1fr)_auto] items-center gap-3 rounded-lg border bg-background p-3 transition-colors hover:bg-muted/40">
             <div className="min-w-0">
-              <div className="truncate text-sm font-semibold text-foreground">{item.email}</div>
-              <div className="mt-0.5 truncate text-xs text-muted-foreground">{item.mailboxId ? mailboxes.find((m) => m.id === item.mailboxId)?.address : "全部邮箱"}{item.reason ? ` · ${item.reason}` : ""}</div>
+              <div className="break-all text-sm font-semibold leading-5 text-foreground">{item.email}</div>
+              <div className="mt-1 break-words text-xs leading-5 text-muted-foreground">{item.mailboxId ? mailboxes.find((m) => m.id === item.mailboxId)?.address : "全部邮箱"}{item.reason ? ` · ${item.reason}` : ""}</div>
             </div>
             <Button variant="ghost" size="icon" className="size-8 shrink-0 text-destructive hover:bg-destructive/10 hover:text-destructive" aria-label={`移除拦截规则 ${item.email}`} title="移除拦截规则" onClick={() => setPendingConfirm({ title: "移除拦截规则？", description: `${item.email} 之后将不再被此规则拦截。`, confirmText: "移除规则", onConfirm: () => { onDelete(item.id); setPendingConfirm(null) } })}><Trash2 className="h-4 w-4" /></Button>
           </div>
@@ -2816,13 +2823,13 @@ function StatsSummary({ stats }: { stats?: MailStats }) {
     { label: stats?.quotaBytes ? `容量 ${Math.min(stats.quotaUsedPct || 0, 999).toFixed(1)}%` : "容量", value: quotaLabel, icon: <BarChart3 className="h-4 w-4" />, tone: "bg-slate-100 text-slate-700" },
   ]
   return (
-    <div className="grid gap-3 sm:grid-cols-2 xl:grid-cols-5">
+    <div className="grid gap-3 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-5">
       {cards.map((card) => (
-        <Card key={card.label} className="shadow-[0_1px_2px_rgba(15,23,42,0.04)]">
-          <CardContent className="flex items-center gap-3 p-4">
+        <Card key={card.label} className="min-w-0 overflow-hidden shadow-[0_1px_2px_rgba(15,23,42,0.04)]">
+          <CardContent className="flex min-w-0 items-center gap-3 p-4">
             <div className={cn("flex size-9 shrink-0 items-center justify-center rounded-lg", card.tone)}>{card.icon}</div>
             <div className="min-w-0">
-              <div className="truncate text-xl font-semibold leading-6 text-foreground">{card.value}</div>
+              <div className="break-words text-lg font-semibold leading-6 text-foreground [overflow-wrap:anywhere]">{card.value}</div>
               <div className="mt-0.5 text-xs text-muted-foreground">{card.label}</div>
             </div>
           </CardContent>
@@ -2832,7 +2839,7 @@ function StatsSummary({ stats }: { stats?: MailStats }) {
   )
 }
 
-function CleanupButton({ icon, title, disabled, onClick }: { icon: React.ReactNode; title: string; disabled: boolean; onClick: () => void }) { return <Button variant="outline" className="h-auto justify-start p-4 text-left" disabled={disabled} onClick={onClick}><div className="mr-3 rounded-lg bg-muted p-2">{icon}</div><div className="font-medium">{title}</div></Button> }
+function CleanupButton({ icon, title, disabled, onClick }: { icon: React.ReactNode; title: string; disabled: boolean; onClick: () => void }) { return <Button variant="outline" className="min-h-[72px] w-full min-w-0 justify-start whitespace-normal px-4 py-3 text-left" disabled={disabled} onClick={onClick}><div className="mr-3 shrink-0 rounded-md bg-muted p-2">{icon}</div><div className="min-w-0 break-words font-medium leading-5">{title}</div></Button> }
 function MailboxSelect({ value, mailboxes, onChange }: { value: string; mailboxes: Mailbox[]; onChange: (value: string) => void }) { return <Select value={value} onValueChange={onChange}><SelectTrigger><SelectValue /></SelectTrigger><SelectContent><SelectItem value="all">全部邮箱</SelectItem>{mailboxes.map((m) => <SelectItem key={m.id} value={m.id}>{m.address}</SelectItem>)}</SelectContent></Select> }
 function Field({ label, children }: { label: string; children: React.ReactNode }) { return <div className="space-y-2"><Label>{label}</Label>{children}</div> }
 function EmptyState({ text, description, icon, action, className }: { text: string; description?: string; icon?: React.ReactNode; action?: React.ReactNode; className?: string }) {

deploy/all-in-one/Dockerfile

@@ -35,7 +35,7 @@ RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
     ca-certificates tzdata sqlite3 supervisor nginx \
     postfix postfix-sqlite \
     dovecot-core dovecot-imapd dovecot-pop3d dovecot-lmtpd dovecot-sqlite ssl-cert \
-    rspamd
+    rspamd zstd openssl
 
 COPY --from=api-build /out/lanqin-api /usr/local/bin/lanqin-api
 COPY --from=web-build /src/apps/web/dist /usr/share/nginx/html
@@ -43,6 +43,7 @@ COPY --from=web-build /src/apps/web/dist /usr/share/nginx/html
 COPY deploy/all-in-one/supervisord.conf /etc/supervisor/conf.d/lanqin.conf
 COPY deploy/all-in-one/nginx.conf /etc/nginx/sites-enabled/default
 COPY deploy/all-in-one/entrypoint.sh /entrypoint.sh
+COPY deploy/docker-compose.yml /usr/share/newszxcn-email/deploy/docker-compose.yml
 
 COPY deploy/postfix/main.cf /etc/postfix/main.cf
 COPY deploy/postfix/master.cf /etc/postfix/master.cf

deploy/api.Dockerfile

@@ -21,5 +21,6 @@ RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
     apt-get update && apt-get install -y --no-install-recommends ca-certificates tzdata
 WORKDIR /app
 COPY --from=build /out/lanqin-api /usr/local/bin/lanqin-api
+COPY deploy/docker-compose.yml /usr/share/newszxcn-email/deploy/docker-compose.yml
 EXPOSE 8080 465 587
 CMD ["lanqin-api"]

deploy/docker-compose.yml

@@ -5,6 +5,8 @@ services:
     environment:
       LANQIN_UPDATE_SERVICE_URL: http://updater:8080/v1/update
       LANQIN_UPDATE_SERVICE_TOKEN: ${LANQIN_UPDATE_TOKEN:-}
+      LANQIN_BACKUP_SOURCE_DIR: /backup-source
+      LANQIN_BACKUP_DIR: /backups
     ports:
       - "${LANQIN_HTTP_BIND:-80}:80"
       - "${LANQIN_SMTP_BIND:-25}:25"
@@ -17,6 +19,9 @@ services:
       - ./mail:/var/mail/vhosts
       - ./dkim:/var/lib/rspamd/dkim
       - ./certs:/certs:ro
+      - ./.env:/backup-source/.env:ro
+      - ./docker-compose.yml:/backup-source/docker-compose.yml:ro
+      - ./backups:/backups
     labels:
       com.centurylinklabs.watchtower.enable: "true"
       com.centurylinklabs.watchtower.scope: "newszxcn-email"

docs/BACKUP_RESTORE.md

@@ -0,0 +1,71 @@
+# NewSzxcn 完整备份与灾难恢复
+
+## 后台创建并推送到 Telegram
+
+1. 使用系统管理员登录 NewSzxcn 后台。
+2. 在“系统设置 -> 通知”绑定 Telegram Bot Token 和私聊 Chat ID，并发送测试通知。
+3. 打开“备份与恢复”。
+4. 在“定时备份与 Telegram 推送”中选择每 3、5、7、30 天，或填写 1 至 365 天的自定义周期。
+5. 备份 Chat ID 留空时沿用邮件通知私聊；也可以填写一个仅管理员可见的私有群组 Chat ID，将邮件通知与备份文件分开。Bot 必须已经加入该群组。
+6. 填写服务器公网 IP。备份密码可以自己输入，也可以点击“生成 24 位”；必须另外保存到 1Password 等密码管理器。
+7. 开启“自动创建并推送”，保存设置。
+8. 首次配置建议点击“创建备份”，勾选“完成后发送到 Telegram”，确认机器人能收到说明消息和 `.tar.zst.enc` 加密附件。
+
+Telegram 消息包含邮局域名、服务器 IP、系统版本、已有域名、管理员账号、普通用户账号、邮箱账号、文件大小、SHA-256 和恢复步骤。已有域名只列域名，不附加账号身份。
+
+消息不会包含管理员密码、用户密码或备份密码。数据库只保存登录密码哈希，不能反向读取明文；恢复后账号继续使用原登录密码。备份密码与加密附件也不应保存在同一个 Telegram 会话中。
+
+## 原服务器失联后的恢复
+
+准备一台新的 Debian 或 Ubuntu 服务器。先把 Telegram 中的加密附件原样上传到新服务器的 `/root/` 目录，请不要解压、修改或固定填写某个示例文件名。备份日期和版本号每次可能不同。
+
+确认文件已经上传后，首次执行官方脚本：
+
+```bash
+curl -fsSL https://raw.githubusercontent.com/zxyszx/NewSzxcn-Email/main/install.sh | sudo bash
+```
+
+脚本显示“尚未安装”管理菜单后，输入 `2`，选择“备份恢复”。在恢复完成后，以后需要管理系统时才使用 `ns` 打开管理菜单。
+
+在“尚未安装”菜单选择：
+
+```text
+==================================================
+          NewSzxcn Email 管理面板
+==================================================
+状态：尚未安装
+--------------------------------------------------
+1. 一键安装 NewSzxcn Email
+2. 备份恢复
+3. 退出
+==================================================
+```
+
+进入备份恢复菜单后，输入 `1` 选择“本地上传”。脚本会自动扫描 `/root/newszxcn-backup-*`：只有一份时直接选中；多份时按日期从新到旧显示为 `1、2、3` 等序号，输入对应序号，例如输入 `1` 恢复第 1 份。没有找到时才要求手动输入完整路径。选定后输入备份密码，脚本会检查压缩包路径、SQLite 完整性和必要目录，再启动服务。
+
+恢复完成后：
+
+1. 如果新服务器 IP 改变，更新邮件主机的 A/AAAA、邮件域名的 MX/SPF，以及服务商处的 PTR 记录。
+2. 检查 DKIM 和 DMARC；DKIM 私钥已随备份恢复，但 DNS 仍应核对。
+3. 检查 TLS 证书是否适用于当前主机名，必要时重新签发。
+4. 登录网页并测试收信、发信、IMAP、POP3 和 SMTP Submission。
+5. 打开“备份与恢复”，重新测试 Telegram 推送。
+
+## 备份内容
+
+完整备份包括 SQLite 数据库、附件、Maildir 原始邮件、DKIM 私钥、TLS 证书、`.env`、Compose 配置、版本清单和 SHA-256 校验文件。备份使用 Zstandard 压缩，并以 AES-256-CBC、PBKDF2 200000 次迭代和 SHA-256 加密。
+
+Telegram 适合保存体积较小的应急副本，不应作为唯一备份位置。超过 Telegram 发送上限的文件请从后台下载，并保存到 Google 云端硬盘、另一台服务器、对象存储或离线磁盘。
+
+## Google 云端硬盘
+
+后台“备份与恢复”支持将同一份加密备份保存到 Google 云端硬盘。系统只申请 `drive.file` 权限，只能管理由 NewSzxcn 创建的文件，不会读取云端硬盘中的其他文件。
+
+1. 在 Google Cloud Console 创建项目并启用 Google Drive API。
+2. 配置 OAuth 同意屏幕，再创建“Web 应用”类型的 OAuth 客户端。
+3. 授权重定向 URI 填写 `https://你的邮局域名/api/admin/backups/google-drive/callback`，必须与后台系统设置中的公开访问地址一致。
+4. 在后台填写 OAuth 客户端 ID、客户端密钥和云端文件夹名称，先保存或直接点击“连接 Google”。
+5. 在 Google 授权页面确认后会自动返回“备份与恢复”，状态显示“已连接”。
+6. 可开启“用于定时备份”，也可在创建备份或已有备份菜单中单独上传。
+
+OAuth 客户端密钥和刷新令牌会使用服务器内部密钥加密保存。Google 云端硬盘中只保存 `.tar.zst.enc` 加密备份，备份密码仍应单独保管。

install.sh

@@ -28,6 +28,7 @@ NewSzxcn Email 管理命令
 
   menu        显示安装与运维菜单
   install     首次安装；已有安装会先完整备份再重新安装
+  restore     从完整备份目录或压缩包恢复到新服务器
   update      备份数据库并更新到最新版
   repair      检查并修复现有安装
   status      查看容器与健康状态
@@ -161,6 +162,25 @@ ensure_cli_alias() {
   success "快捷命令已创建：输入 ns 可打开管理菜单。"
 }
 
+ensure_cli_command() {
+  local source_dir tmp
+  [[ -x "${CLI_PATH}" ]] && return 0
+  install -d -m 0755 "$(dirname "${CLI_PATH}")"
+  source_dir="$(script_dir || true)"
+  if [[ -n "${BASH_SOURCE[0]:-}" && "${BASH_SOURCE[0]}" != /dev/fd/* && -f "${source_dir}/install.sh" ]]; then
+    install -m 0755 "${source_dir}/install.sh" "${CLI_PATH}"
+  else
+    tmp="$(mktemp)"
+    if ! curl -fsSL "${RAW_BASE}/install.sh" -o "${tmp}" || ! bash -n "${tmp}"; then
+      rm -f "${tmp}"
+      warn "未能安装管理命令；完成安装后可重新运行官方脚本修复。"
+      return 0
+    fi
+    install -m 0755 "${tmp}" "${CLI_PATH}"
+    rm -f "${tmp}"
+  fi
+}
+
 refresh_assets() {
   stage_assets
   apply_staged_assets
@@ -1077,6 +1097,277 @@ do_install() {
   warn "输入 ns 可打开管理菜单；输入 newszxcn-email guide 可查看邮箱后台配置指南。"
 }
 
+validate_restore_source() {
+  local source="$1"
+  [[ -f "${source}/.env" ]] || { warn "备份缺少 .env。"; return 1; }
+  [[ -f "${source}/docker-compose.yml" ]] || { warn "备份缺少 docker-compose.yml。"; return 1; }
+  [[ -s "${source}/data/lanqin.db" ]] || { warn "备份缺少数据库 data/lanqin.db。"; return 1; }
+  [[ -d "${source}/mail" ]] || { warn "备份缺少 mail 邮件目录。"; return 1; }
+  [[ -d "${source}/dkim" ]] || { warn "备份缺少 dkim 密钥目录。"; return 1; }
+  [[ -d "${source}/certs" ]] || { warn "备份缺少 certs 证书目录。"; return 1; }
+}
+
+validate_restore_database() {
+  local database="$1" result
+  if ! command -v sqlite3 >/dev/null 2>&1; then
+    log "正在安装 SQLite 校验工具..."
+    install_packages sqlite3
+  fi
+  result="$(sqlite3 "${database}" 'PRAGMA integrity_check;' 2>/dev/null || true)"
+  [[ "${result}" == "ok" ]] || { warn "备份数据库完整性检查未通过。"; return 1; }
+}
+
+locate_extracted_restore_root() {
+  local root="$1" candidate
+  if validate_restore_source "${root}" >/dev/null 2>&1; then
+    printf '%s' "${root}"
+    return 0
+  fi
+  candidate="$(find "${root}" -mindepth 1 -maxdepth 2 -type f -name .env -print -quit 2>/dev/null || true)"
+  [[ -n "${candidate}" ]] || return 1
+  candidate="$(dirname "${candidate}")"
+  validate_restore_source "${candidate}" >/dev/null 2>&1 || return 1
+  printf '%s' "${candidate}"
+}
+
+render_restore_menu() {
+  prompt_text '\n==================================================\n'
+  prompt_text '          NewSzxcn Email 备份恢复\n'
+  prompt_text '==================================================\n'
+  prompt_text '1. 本地上传\n'
+  prompt_text '2. 返回上一级\n'
+  prompt_text '==================================================\n'
+  prompt_text '请先将原始加密备份上传到新服务器的 /root/ 目录，不要解压。\n'
+  prompt_text '系统会自动检测 /root/ 目录中的 NewSzxcn 备份文件。\n'
+}
+
+do_restore_menu() {
+  local choice
+  render_restore_menu
+  choice="$(prompt_menu_choice "1" "2")" || return 1
+  case "${choice}" in
+    1) do_restore_backup ;;
+    2) success "已返回，未作任何修改。" ;;
+  esac
+}
+
+prompt_restore_password() {
+  local password="${LANQIN_RESTORE_PASSWORD:-}"
+  if [[ -z "${password}" ]] && has_tty; then
+    read -r -s -p "备份密码: " password </dev/tty
+    printf '\n' >/dev/tty
+  fi
+  [[ -n "${password}" ]] || fail "加密备份必须提供备份密码。"
+  (( ${#password} >= 8 && ${#password} <= 1024 )) || fail "备份密码必须为 8 至 1024 个字符。"
+  [[ "${password}" != *$'\n'* && "${password}" != *$'\r'* ]] || fail "备份密码不能包含换行。"
+  printf '%s' "${password}"
+}
+
+discover_restore_backups() {
+  local search_dir="${LANQIN_RESTORE_SEARCH_DIR:-/root}" path
+  local -a matches=()
+  [[ -d "${search_dir}" ]] || return 0
+  while IFS= read -r path; do
+    case "${path}" in
+      *.tar.zst.enc|*.tar.zst|*.tar.gz|*.tgz|*.tar) matches+=("${path}") ;;
+    esac
+  done < <(find "${search_dir}" -maxdepth 1 -type f -name 'newszxcn-backup-*' -print 2>/dev/null | LC_ALL=C sort -r)
+  (( ${#matches[@]} > 0 )) || return 0
+  printf '%s\n' "${matches[@]}"
+}
+
+select_restore_source() {
+  local selection="${LANQIN_RESTORE_SELECTION:-}" path index
+  local -a backups=()
+  while IFS= read -r path; do
+    [[ -n "${path}" ]] && backups+=("${path}")
+  done < <(discover_restore_backups)
+
+  if (( ${#backups[@]} == 1 )); then
+    prompt_text "[检测] 已找到备份：${backups[0]}\n"
+    printf '%s' "${backups[0]}"
+    return 0
+  fi
+  if (( ${#backups[@]} > 1 )); then
+    prompt_text "[检测] 在 /root/ 找到 ${#backups[@]} 份备份：\n"
+    for index in "${!backups[@]}"; do
+      prompt_text "$((index + 1)). ${backups[index]}\n"
+    done
+    prompt_text "$(( ${#backups[@]} + 1 )). 手动输入其他路径\n"
+    if [[ -z "${selection}" ]] && has_tty; then
+      read -r -p "请输入要恢复的备份序号 [1]: " selection </dev/tty
+    fi
+    selection="${selection:-1}"
+    if [[ "${selection}" =~ ^[0-9]+$ ]] && (( selection >= 1 && selection <= ${#backups[@]} )); then
+      prompt_text "[选择] 将使用第 ${selection} 份备份开始恢复。\n"
+      printf '%s' "${backups[selection-1]}"
+      return 0
+    fi
+    [[ "${selection}" == "$(( ${#backups[@]} + 1 ))" ]] || fail "备份序号无效。"
+  else
+    prompt_text "[提示] /root/ 目录没有检测到 NewSzxcn 备份，请手动输入路径。\n"
+  fi
+  if has_tty; then
+    read -r -p "备份文件完整路径: " path </dev/tty
+  else
+    path="${LANQIN_RESTORE_SOURCE:-}"
+  fi
+  printf '%s' "${path}"
+}
+
+archive_has_unsafe_paths() {
+  awk '
+    BEGIN { bad=0 }
+    {
+      if (substr($0, 1, 1) == "/") bad=1
+      count=split($0, parts, "/")
+      for (i=1; i<=count; i++) if (parts[i] == "..") bad=1
+    }
+    END { exit bad ? 0 : 1 }
+  '
+}
+
+archive_has_unsafe_types() {
+  awk '
+    BEGIN { bad=0 }
+    /^[[:space:]]*$/ { next }
+    {
+      type=substr($0, 1, 1)
+      if (type != "-" && type != "d") bad=1
+    }
+    END { exit bad ? 0 : 1 }
+  '
+}
+
+extract_restore_archive() {
+  local source="$1" destination="$2" password decrypted
+  case "${source}" in
+    *.tar.zst.enc)
+      command -v openssl >/dev/null 2>&1 || install_packages openssl
+      command -v zstd >/dev/null 2>&1 || install_packages zstd
+      password="$(prompt_restore_password)"
+      decrypted="${destination}/backup.tar.zst"
+      if ! openssl enc -d -aes-256-cbc -pbkdf2 -iter 200000 -md sha256 -in "${source}" -out "${decrypted}" -pass fd:3 3<<<"${password}" 2>/dev/null; then
+        fail "备份密码错误或加密备份已损坏。"
+      fi
+      if zstd -dc "${decrypted}" 2>/dev/null | tar -tf - | archive_has_unsafe_paths; then
+        fail "备份压缩包包含不安全路径，已拒绝恢复。"
+      fi
+      if zstd -dc "${decrypted}" 2>/dev/null | tar -tvf - | archive_has_unsafe_types; then
+        fail "备份压缩包包含链接或特殊文件，已拒绝恢复。"
+      fi
+      zstd -dc "${decrypted}" 2>/dev/null | tar -xf - -C "${destination}" \
+        || fail "加密备份无法解压，请检查文件和密码。"
+      rm -f "${decrypted}"
+      ;;
+    *.tar.zst)
+      command -v zstd >/dev/null 2>&1 || install_packages zstd
+      if zstd -dc "${source}" 2>/dev/null | tar -tf - | archive_has_unsafe_paths; then
+        fail "备份压缩包包含不安全路径，已拒绝恢复。"
+      fi
+      if zstd -dc "${source}" 2>/dev/null | tar -tvf - | archive_has_unsafe_types; then
+        fail "备份压缩包包含链接或特殊文件，已拒绝恢复。"
+      fi
+      zstd -dc "${source}" 2>/dev/null | tar -xf - -C "${destination}" \
+        || fail "Zstandard 备份无法解压。"
+      ;;
+    *.tar|*.tar.gz|*.tgz)
+      if tar -tf "${source}" | archive_has_unsafe_paths; then
+        fail "备份压缩包包含不安全路径，已拒绝恢复。"
+      fi
+      if tar -tvf "${source}" | archive_has_unsafe_types; then
+        fail "备份压缩包包含链接或特殊文件，已拒绝恢复。"
+      fi
+      tar -xf "${source}" -C "${destination}" || fail "备份压缩包无法解压。"
+      ;;
+    *)
+      fail "不支持的备份格式；请选择 .tar.zst.enc、.tar.zst、.tar.gz、.tgz 或 .tar。"
+      ;;
+  esac
+}
+
+do_restore_backup() {
+  local source="${LANQIN_RESTORE_SOURCE:-}" extracted="" restore_root staging image_ref image nginx_backup=""
+  ! installation_configured || fail "当前服务器已经存在安装配置；为防止覆盖运行数据，只能在空白新服务器执行完整恢复。"
+  [[ -n "${source}" ]] || source="$(select_restore_source)"
+  [[ -n "${source}" ]] || fail "请提供备份目录或备份压缩包路径。"
+  source="$(readlink -f "${source}" 2>/dev/null || true)"
+  [[ -e "${source}" ]] || fail "备份不存在：${source}"
+
+  if [[ -d "${source}" ]]; then
+    restore_root="${source}"
+  else
+    command -v tar >/dev/null 2>&1 || install_packages tar
+    extracted="$(mktemp -d)"
+    extract_restore_archive "${source}" "${extracted}"
+    restore_root="$(locate_extracted_restore_root "${extracted}" || true)"
+  fi
+  if [[ -z "${restore_root}" ]] || ! validate_restore_source "${restore_root}"; then
+    [[ -n "${extracted}" ]] && rm -rf "${extracted}"
+    fail "这不是可恢复的 NewSzxcn 完整备份。"
+  fi
+  if ! validate_restore_database "${restore_root}/data/lanqin.db"; then
+    [[ -n "${extracted}" ]] && rm -rf "${extracted}"
+    fail "备份数据库已损坏，未写入任何 NewSzxcn 数据。"
+  fi
+
+  staging="${INSTALL_DIR}.restore-staging-$(date -u +%Y%m%dT%H%M%SZ)"
+  [[ ! -e "${INSTALL_DIR}" || -z "$(find "${INSTALL_DIR}" -mindepth 1 -maxdepth 1 -print -quit 2>/dev/null)" ]] \
+    || fail "${INSTALL_DIR} 已有文件，已取消恢复以免覆盖数据。"
+  rm -rf "${staging}"
+  install -d -m 0700 "${staging}"
+  cp -a "${restore_root}/." "${staging}/"
+  [[ -n "${extracted}" ]] && rm -rf "${extracted}"
+  rm -rf "${INSTALL_DIR}"
+  mv "${staging}" "${INSTALL_DIR}"
+  chmod 0600 "${INSTALL_DIR}/.env"
+
+  if [[ -f "${NGINX_CONFIG}" ]]; then
+    nginx_backup="$(mktemp)"
+    cp -a "${NGINX_CONFIG}" "${nginx_backup}"
+  fi
+
+  if ! (
+    refresh_assets
+    ensure_update_token
+    ensure_admin_email_config
+    configure_runtime_bindings
+    ensure_docker
+    configure_firewall
+    prepare_directories
+    log "正在拉取恢复所需的 NewSzxcn Email 镜像..."
+    compose pull
+    image_ref="$(env_value LANQIN_IMAGE || true)"
+    image_ref="${image_ref:-ghcr.io/zxyszx/newszxcn-email:latest}"
+    image="$(docker image inspect --format '{{.Id}}' "${image_ref}" 2>/dev/null || true)"
+    [[ -n "${image}" ]] || fail "无法检查恢复数据库：镜像不存在。"
+    sqlite_integrity_check "${INSTALL_DIR}/data/lanqin.db" "${image}" || fail "备份数据库完整性检查未通过，服务未启动。"
+    log "备份检查通过，正在启动服务..."
+    compose up -d --remove-orphans
+    wait_for_health 90 || fail "恢复后的服务未通过健康检查，请执行 newszxcn-email logs。"
+    configure_web_mode
+  ); then
+    warn "恢复未完成，正在清理本次未成功的安装。"
+    compose down --remove-orphans >/dev/null 2>&1 || true
+    rm -rf "${INSTALL_DIR}"
+    if [[ -n "${nginx_backup}" && -f "${nginx_backup}" ]]; then
+      cp -a "${nginx_backup}" "${NGINX_CONFIG}"
+    elif [[ -f "${NGINX_CONFIG}" ]]; then
+      rm -f "${NGINX_CONFIG}"
+    fi
+    rm -f "${nginx_backup}"
+    if nginx -t >/dev/null 2>&1; then
+      systemctl reload nginx >/dev/null 2>&1 || true
+    fi
+    fail "恢复失败，原始备份文件未修改；修复问题后可重新执行备份恢复。"
+  fi
+  rm -f "${nginx_backup}"
+  ensure_cli_alias
+  generate_guide >/dev/null || warn "数据已恢复，但配置指南生成失败，可稍后执行 newszxcn-email guide。"
+  success "备份恢复完成：$(env_value LANQIN_PUBLIC_BASE_URL)"
+  warn "如果服务器 IP 已更换，请更新 A、MX、SPF、PTR，并重新检查 TLS 证书。"
+}
+
 do_update() {
   require_installation
   ensure_docker
@@ -1503,7 +1794,8 @@ render_uninstalled_menu() {
   prompt_text '状态：尚未安装\n'
   prompt_text '--------------------------------------------------\n'
   prompt_text '1. 一键安装 NewSzxcn Email\n'
-  prompt_text '0. 退出\n'
+  prompt_text '2. 备份恢复\n'
+  prompt_text '3. 退出\n'
   prompt_text '==================================================\n'
 }
 
@@ -1541,10 +1833,11 @@ do_menu() {
   local default_choice="2" public_url="" choice status version
   if ! installation_configured; then
     render_uninstalled_menu
-    choice="$(prompt_menu_choice "1" "1")" || return 1
+    choice="$(prompt_menu_choice "1" "3")" || return 1
     case "${choice}" in
-      0) success "已退出，未作任何修改。" ;;
+      3) success "已退出，未作任何修改。" ;;
       1) do_install ;;
+      2) do_restore_menu ;;
     esac
     return
   fi
@@ -1581,6 +1874,7 @@ if [[ "${LANQIN_SOURCE_ONLY:-false}" == "true" ]]; then
 fi
 
 if [[ "${EUID}" -eq 0 ]]; then
+  ensure_cli_command
   ensure_cli_alias
 fi
 
@@ -1588,6 +1882,7 @@ case "${COMMAND}" in
   help|-h|--help) usage ;;
   menu) require_root; require_curl; do_menu ;;
   install) require_root; require_curl; do_install ;;
+  restore) require_root; require_curl; do_restore_menu ;;
   update) require_root; require_curl; do_update ;;
   repair) require_root; require_curl; do_repair_install ;;
   status) require_root; require_curl; do_status ;;

tests/install_test.sh

@@ -159,6 +159,8 @@ test_menu_rendering() (
   [[ "${output}" == *'NewSzxcn Email 管理面板'* ]] || fail_test "uninstalled menu title missing"
   [[ "${output}" == *'状态：尚未安装'* ]] || fail_test "uninstalled menu status missing"
   [[ "${output}" == *'1. 一键安装 NewSzxcn Email'* ]] || fail_test "uninstalled menu install action missing"
+  [[ "${output}" == *'2. 备份恢复'* ]] || fail_test "uninstalled menu restore action missing"
+  [[ "${output}" == *'3. 退出'* ]] || fail_test "uninstalled menu exit action missing"
   [[ "${output}" != *'更新系统'* ]] || fail_test "uninstalled menu exposes update action"
   [[ "${output}" != *'卸载服务'* ]] || fail_test "uninstalled menu exposes uninstall action"
 
@@ -186,12 +188,15 @@ test_menu_dispatch() (
   mkdir -p "${INSTALL_DIR}"
   prompt_text() { :; }
   do_install() { printf 'install\n' > "${action_file}"; }
+  do_restore_menu() { printf 'restore-menu\n' > "${action_file}"; }
 
   do_menu
   grep -Fq 'install' "${action_file}" || fail_test "uninstalled menu did not dispatch install"
-  if (LANQIN_MENU_ACTION=2 do_menu >/dev/null 2>&1); then
-    fail_test "uninstalled menu accepted unavailable update action"
-  fi
+  LANQIN_MENU_ACTION=2
+  do_menu
+  grep -Fq 'restore-menu' "${action_file}" || fail_test "uninstalled menu did not dispatch restore"
+  LANQIN_MENU_ACTION=3
+  do_menu >/dev/null
 
   printf 'LANQIN_PUBLIC_BASE_URL=https://mail.example.com\n' > "${INSTALL_DIR}/.env"
   printf 'services: {}\n' > "${INSTALL_DIR}/docker-compose.yml"
@@ -430,6 +435,144 @@ test_cli_alias_safety() (
   grep -Fq 'occupied' "${CLI_ALIAS_PATH}" || fail_test "existing ns command was overwritten"
 )
 
+test_restore_source_validation() (
+  local temp_dir
+  temp_dir="$(mktemp -d)"
+  mkdir -p "${temp_dir}/data" "${temp_dir}/mail" "${temp_dir}/dkim" "${temp_dir}/certs"
+  printf 'config\n' > "${temp_dir}/.env"
+  printf 'services: {}\n' > "${temp_dir}/docker-compose.yml"
+  sqlite3 "${temp_dir}/data/lanqin.db" 'CREATE TABLE restore_test (id INTEGER PRIMARY KEY);'
+  validate_restore_source "${temp_dir}" || fail_test "valid restore source rejected"
+  validate_restore_database "${temp_dir}/data/lanqin.db" || fail_test "valid restore database rejected"
+  printf 'damaged\n' > "${temp_dir}/data/lanqin.db"
+  if validate_restore_database "${temp_dir}/data/lanqin.db" >/dev/null 2>&1; then
+    fail_test "damaged restore database accepted"
+  fi
+  rm -f "${temp_dir}/data/lanqin.db"
+  if validate_restore_source "${temp_dir}" >/dev/null 2>&1; then
+    fail_test "restore source without database accepted"
+  fi
+)
+
+test_restore_menu_rendering_and_dispatch() (
+  local output action_file LANQIN_MENU_ACTION=1
+  action_file="$(mktemp)"
+  prompt_text() { printf '%b' "$1"; }
+  output="$(render_restore_menu)"
+  [[ "${output}" == *'NewSzxcn Email 备份恢复'* ]] || fail_test "restore menu title missing"
+  [[ "${output}" == *'1. 本地上传'* ]] || fail_test "restore local upload action missing"
+  [[ "${output}" == *'2. 返回上一级'* ]] || fail_test "restore back action missing"
+  [[ "${output}" == *'自动检测 /root/'* ]] || fail_test "restore automatic discovery hint missing"
+  prompt_text() { :; }
+  do_restore_backup() { printf 'restore\n' > "${action_file}"; }
+  do_restore_menu
+  grep -Fq 'restore' "${action_file}" || fail_test "restore menu did not dispatch local upload"
+  LANQIN_MENU_ACTION=2
+  do_restore_menu >/dev/null
+  unset LANQIN_MENU_ACTION
+)
+
+test_restore_backup_discovery() (
+  local temp_dir output selected
+  temp_dir="$(mktemp -d)"
+  LANQIN_RESTORE_SEARCH_DIR="${temp_dir}"
+  touch "${temp_dir}/unrelated.tar.zst.enc"
+  output="$(discover_restore_backups)"
+  [[ -z "${output}" ]] || fail_test "unrelated archive was discovered"
+
+  touch "${temp_dir}/newszxcn-backup-20260810-120000-1.2.30.tar.zst.enc"
+  selected="$(select_restore_source)"
+  assert_eq "${temp_dir}/newszxcn-backup-20260810-120000-1.2.30.tar.zst.enc" "${selected}" "single discovered restore backup"
+
+  touch "${temp_dir}/newszxcn-backup-20260812-120000-1.2.32.tar.zst.enc"
+  touch "${temp_dir}/newszxcn-backup-20260811-120000-1.2.31.tar.zst.enc"
+  output="$(discover_restore_backups)"
+  assert_eq "newszxcn-backup-20260812-120000-1.2.32.tar.zst.enc" "$(printf '%s\n' "${output}" | head -n 1 | xargs basename)" "newest restore backup ordering"
+  LANQIN_RESTORE_SELECTION=2
+  selected="$(select_restore_source)"
+  assert_eq "${temp_dir}/newszxcn-backup-20260811-120000-1.2.31.tar.zst.enc" "${selected}" "selected discovered restore backup"
+)
+
+test_encrypted_restore_archive() (
+  local temp_dir source_dir archive extracted password='RestorePassword123!'
+  temp_dir="$(mktemp -d)"
+  source_dir="${temp_dir}/source/newszxcn-email"
+  archive="${temp_dir}/newszxcn-backup.tar.zst.enc"
+  extracted="${temp_dir}/extracted"
+  mkdir -p "${source_dir}/data" "${source_dir}/mail" "${source_dir}/dkim" "${source_dir}/certs" "${extracted}"
+  printf 'config\n' > "${source_dir}/.env"
+  printf 'services: {}\n' > "${source_dir}/docker-compose.yml"
+  sqlite3 "${source_dir}/data/lanqin.db" 'CREATE TABLE restore_test (id INTEGER PRIMARY KEY);'
+  zstd() {
+    if [[ "$*" == '-q -c' ]]; then
+      gzip -c
+    elif [[ "$1" == '-dc' ]]; then
+      gzip -dc "$2"
+    else
+      return 1
+    fi
+  }
+  tar -C "${temp_dir}/source" -cf - newszxcn-email | zstd -q -c | \
+    openssl enc -aes-256-cbc -pbkdf2 -iter 200000 -md sha256 -out "${archive}" -pass fd:3 3<<<"${password}"
+  LANQIN_RESTORE_PASSWORD="${password}" extract_restore_archive "${archive}" "${extracted}"
+  validate_restore_source "${extracted}/newszxcn-email" || fail_test "encrypted restore archive extraction failed"
+)
+
+test_failed_full_restore_cleans_partial_install() (
+  local temp_dir source_dir archive password='RestorePassword123!'
+  temp_dir="$(mktemp -d)"
+  source_dir="${temp_dir}/source/newszxcn-backup"
+  archive="${temp_dir}/newszxcn-backup-20260812-120000-1.2.31.tar.zst.enc"
+  INSTALL_DIR="${temp_dir}/install"
+  NGINX_CONFIG="${temp_dir}/nginx/newszxcn.conf"
+  CERT_DIR="${temp_dir}/certs"
+  LANQIN_RESTORE_SOURCE="${archive}"
+  LANQIN_RESTORE_PASSWORD="${password}"
+  mkdir -p "${source_dir}/data" "${source_dir}/mail" "${source_dir}/dkim" "${source_dir}/certs" "$(dirname "${NGINX_CONFIG}")"
+  printf 'LANQIN_PUBLIC_BASE_URL=https://mail.example.com\n' > "${source_dir}/.env"
+  printf 'services: {}\n' > "${source_dir}/docker-compose.yml"
+  sqlite3 "${source_dir}/data/lanqin.db" 'CREATE TABLE restore_test (id INTEGER PRIMARY KEY);'
+  zstd() {
+    if [[ "$*" == '-q -c' ]]; then
+      gzip -c
+    elif [[ "$1" == '-dc' ]]; then
+      gzip -dc "$2"
+    else
+      return 1
+    fi
+  }
+  tar -C "${temp_dir}/source" -cf - newszxcn-backup | zstd -q -c | \
+    openssl enc -aes-256-cbc -pbkdf2 -iter 200000 -md sha256 -out "${archive}" -pass fd:3 3<<<"${password}"
+  refresh_assets() { return 0; }
+  ensure_update_token() { return 0; }
+  ensure_admin_email_config() { return 0; }
+  configure_runtime_bindings() { return 0; }
+  ensure_docker() { return 0; }
+  configure_firewall() { return 0; }
+  prepare_directories() { return 0; }
+  compose() {
+    case "$1" in
+      pull) return 1 ;;
+      down) return 0 ;;
+    esac
+    return 0
+  }
+  if (do_restore_backup >/dev/null 2>&1); then
+    fail_test "failed full restore unexpectedly succeeded"
+  fi
+  [[ ! -e "${INSTALL_DIR}" ]] || fail_test "failed restore left a partial installation"
+  [[ -f "${archive}" ]] || fail_test "failed restore removed the original encrypted backup"
+)
+
+test_restore_archive_path_validation() (
+  printf 'safe/path\n' | archive_has_unsafe_paths && fail_test "safe archive path rejected"
+  printf '../escape\n' | archive_has_unsafe_paths || fail_test "parent archive path accepted"
+  printf '/absolute\n' | archive_has_unsafe_paths || fail_test "absolute archive path accepted"
+  printf '%s\n' '-rw------- root/root 1 2026-08-12 00:00 safe' | archive_has_unsafe_types && fail_test "regular archive file rejected"
+  printf '%s\n' 'drwx------ root/root 0 2026-08-12 00:00 safe/' | archive_has_unsafe_types && fail_test "archive directory rejected"
+  printf '%s\n' 'lrwxrwxrwx root/root 0 2026-08-12 00:00 unsafe -> /etc' | archive_has_unsafe_types || fail_test "archive symlink accepted"
+)
+
 test_compose_runtime_image_pin() (
   local temp_dir calls
   temp_dir="$(mktemp -d)"
@@ -707,6 +850,12 @@ test_offline_database_backup
 test_guide_generation
 test_acme_cron_detection
 test_cli_alias_safety
+test_restore_source_validation
+test_restore_menu_rendering_and_dispatch
+test_restore_backup_discovery
+test_encrypted_restore_archive
+test_failed_full_restore_cleans_partial_install
+test_restore_archive_path_validation
 test_compose_runtime_image_pin
 test_update_snapshot_restore
 test_snapshot_restores_absent_optional_files