feat: 前后端功能对齐 - 实现8个对齐差距

P0-1: 分类拖拽排序 - category-manage 添加拖拽 UI
P1-1: 反馈回复展示 - 新增 GET /feedback/mine + 前端我的反馈Tab
P1-2: 备份管理页面 - 新增下载端点 + backup-manage 页面
P2-1: 统计年度/周视图 - stats 支持 period 参数 + 前端维度切换器
P2-2: 数据导入 - 新增 POST /import 端点 + data-import 页面
P2-3: 数据导出服务端化 - 新增 GET /export 流式端点
P3-1: 健康检查展示 - health 移到 auth 前 + admin 状态卡片
P3-2~4: 交易标签系统 - tags CRUD + 交易关联 + 按标签筛选统计

后端: 新增 tag.ts/export.ts 路由, 改造 feedback/backup/transaction/stats
前端: 新增 DragSortList 组件, 3个新页面, 改造 7 个现有页面
QA 修复: 5个严重Bug + 4个潜在问题

client/src/api/admin.ts

@@ -54,3 +54,11 @@ export function updateUserRole(id: number, role: 'user' | 'admin') {
 export function deleteUser(id: number) {
   return request({ url: `/admin/users/${id}`, method: 'DELETE' })
 }
+
+// 健康检查类型从 @/api/health 导入
+export type { HealthStatus } from '@/api/health'
+
+/** 获取服务健康状态（管理员） */
+export function getHealth() {
+  return request<import('./health').HealthStatus>({ url: '/health' })
+}

client/src/api/backup.ts

@@ -0,0 +1,38 @@
+import { request } from '@/utils/request'
+
+/** 备份记录 */
+export interface Backup {
+  id: number
+  name: string
+  size: number
+  status: 'pending' | 'completed' | 'failed'
+  created_at: string
+  downloadToken?: string
+}
+
+/** 备份列表响应 */
+export interface BackupList {
+  list: Backup[]
+  total: number
+}
+
+/** 获取备份列表 */
+export function getBackups(params?: { page?: number; pageSize?: number }) {
+  return request<BackupList>({ url: '/backup', data: params })
+}
+
+/** 创建备份 */
+export function createBackup() {
+  return request<{ id: number }>({ url: '/backup', method: 'POST' })
+}
+
+/** 删除备份 */
+export function deleteBackup(id: number) {
+  return request({ url: `/backup/${id}`, method: 'DELETE' })
+}
+
+/** 获取备份下载地址 */
+export function getBackupDownloadUrl(id: number, token: string): string {
+  const apiBase = typeof window !== 'undefined' ? '/api' : ''
+  return `${apiBase}/backup/${id}/download?token=${encodeURIComponent(token)}`
+}

client/src/api/export.ts

@@ -0,0 +1,32 @@
+import { request } from '@/utils/request'
+import { API_BASE } from '@/config'
+
+/** 导出参数 */
+export interface ExportParams {
+  startDate: string
+  endDate: string
+  type?: 'expense' | 'income' | 'all'
+  format?: 'csv' | 'json'
+}
+
+/** 请求服务端导出（返回流） */
+export function requestExport(params: ExportParams) {
+  return request<{ downloadUrl: string }>({
+    url: '/export',
+    data: { ...params, format: params.format || 'csv' }
+  })
+}
+
+/** 获取服务端导出下载 URL */
+export function getExportUrl(params: ExportParams): string {
+  const query = new URLSearchParams()
+  query.set('startDate', params.startDate)
+  query.set('endDate', params.endDate)
+  if (params.type) query.set('type', params.type)
+  if (params.format) query.set('format', params.format)
+
+  const token = uni.getStorageSync('xc:token')
+  if (token) query.set('token', token)
+
+  return `${API_BASE}/export?${query.toString()}`
+}

client/src/api/feedback.ts

@@ -29,6 +29,22 @@ export function getFeedbackList(params?: { page?: number; pageSize?: number; sta
   return request<{ list: Feedback[]; total: number; page: number; pageSize: number }>({ url: '/feedback', data: params })
 }
 
+/** 我的反馈条目（简化版） */
+export interface MyFeedback {
+  id: number
+  type: string
+  content: string
+  contact: string
+  status: 'pending' | 'processed' | 'ignored'
+  admin_reply?: string
+  created_at: string
+}
+
+/** 获取我的反馈列表 */
+export function getMyFeedbacks(params?: { page?: number; pageSize?: number }) {
+  return request<{ list: MyFeedback[]; total: number; page: number; pageSize: number }>({ url: '/feedback/mine', data: params })
+}
+
 /** 更新反馈状态（管理员） */
 export function updateFeedbackStatus(id: number, status: Feedback['status'], admin_reply?: string) {
   return request({ url: `/feedback/${id}/status`, method: 'PUT', data: { status, admin_reply } })

client/src/api/health.ts

@@ -0,0 +1,15 @@
+import { request } from '@/utils/request'
+
+/** 健康检查结果 */
+export interface HealthStatus {
+  status: 'ok' | 'degraded' | 'error'
+  uptime: number
+  db: 'connected' | 'disconnected'
+  version: string
+  timestamp: string
+}
+
+/** 获取服务健康状态 */
+export function getHealth() {
+  return request<HealthStatus>({ url: '/health' })
+}

client/src/api/stats.ts

@@ -25,6 +25,7 @@ export interface CategoryStat {
 export interface TrendPoint {
   date: string
   amount: number
+  label?: string
 }
 
 /** 获取概览数据 */
@@ -33,13 +34,13 @@ export function getOverview(params?: { month?: string; startDate?: string; endDa
 }
 
 /** 获取分类统计 */
-export function getCategoryStats(month?: string, type: string = 'expense', group_id?: number | null) {
-  return request<CategoryStat[]>({ url: '/stats/category', data: { month, type, group_id } })
+export function getCategoryStats(month?: string, type: string = 'expense', group_id?: number | null, period?: 'week' | 'month' | 'year') {
+  return request<CategoryStat[]>({ url: '/stats/category', data: { month, type, group_id, period } })
 }
 
 /** 获取趋势数据 */
-export function getTrend(month?: string, type: string = 'expense', group_id?: number | null) {
-  return request<TrendPoint[]>({ url: '/stats/trend', data: { month, type, group_id } })
+export function getTrend(month?: string, type: string = 'expense', group_id?: number | null, period?: 'week' | 'month' | 'year') {
+  return request<TrendPoint[]>({ url: '/stats/trend', data: { month, type, group_id, period } })
 }
 
 /** 智能分类建议结果 */

client/src/api/tag.ts

@@ -0,0 +1,47 @@
+import { request } from '@/utils/request'
+
+/** 标签 */
+export interface Tag {
+  id: number
+  name: string
+  color: string
+  created_at: string
+}
+
+/** 标签统计 */
+export interface TagStat {
+  tag_id: number
+  tag_name: string
+  tag_color: string
+  count: number
+  total_amount: number
+}
+
+/** 获取标签列表 */
+export function getTags() {
+  return request<Tag[]>({ url: '/tags' })
+}
+
+/** 创建标签 */
+export function createTag(data: { name: string; color: string }) {
+  return request<{ id: number }>({ url: '/tags', method: 'POST', data })
+}
+
+/** 更新标签 */
+export function updateTag(id: number, data: { name?: string; color?: string }) {
+  return request({ url: `/tags/${id}`, method: 'PUT', data })
+}
+
+/** 删除标签 */
+export function deleteTag(id: number) {
+  return request({ url: `/tags/${id}`, method: 'DELETE' })
+}
+
+/** 按标签统计 */
+export function getTagStats(params?: {
+  month?: string
+  period?: 'week' | 'month' | 'year'
+  type?: 'expense' | 'income'
+}) {
+  return request<TagStat[]>({ url: '/tags/stats/by-tag', data: params })
+}

client/src/api/transaction.ts

@@ -15,6 +15,14 @@ export interface Transaction {
   group_id?: number | null
   creator_nickname?: string
   creator_avatar?: string
+  tags?: TagItem[]
+}
+
+/** 标签简略信息 */
+export interface TagItem {
+  id: number
+  name: string
+  color: string
 }
 
 /** 交易列表响应 */
@@ -40,6 +48,7 @@ export interface TransactionParams {
   minAmount?: number
   maxAmount?: number
   keyword?: string
+  tagId?: number
 }
 
 /** 获取交易列表 */
@@ -60,6 +69,7 @@ export function createTransaction(data: {
   note?: string
   date: string
   group_id?: number | null
+  tagIds?: number[]
 }) {
   return request<{ id: number }>({ url: '/transactions', method: 'POST', data })
 }
@@ -71,6 +81,7 @@ export function updateTransaction(id: number, data: {
   category_id?: number
   note?: string
   date: string
+  tagIds?: number[]
 }) {
   return request({ url: `/transactions/${id}`, method: 'PUT', data })
 }
@@ -79,3 +90,16 @@ export function updateTransaction(id: number, data: {
 export function deleteTransaction(id: number) {
   return request({ url: `/transactions/${id}`, method: 'DELETE' })
 }
+
+/** 导入交易记录 */
+export function importTransactions(data: {
+  transactions: Array<{
+    date: string
+    type: 'expense' | 'income'
+    category_name: string
+    amount: number
+    note?: string
+  }>
+}) {
+  return request<{ imported: number; skipped: number }>({ url: '/transactions/import', method: 'POST', data })
+}