fix: 清理死代码 + 修复群组模式预算支出计算

- 清理 store 中未使用的 loading 状态（stats/budget/category/user）
- 清理 stats store 冗余类型重导出和 catch 重置逻辑
- 清理 transaction store 未使用的 currentPage
- 清理 api/group 未使用的 GroupDetail/GroupMember/getGroupDetail
- 删除无引用的 api/index.ts barrel 导出文件
- 删除后端未调用的 GET /groups/:id 群组详情路由
- 合并 stats 页面重复的 loadTabData 函数
- 修复预算页群组模式下只算个人支出（不传 group_id）

client/src/api/group.ts

@@ -12,21 +12,6 @@ export interface Group {
   member_count: number
 }
 
-/** 群组详情（含成员） */
-export interface GroupDetail extends Group {
-  members: GroupMember[]
-}
-
-/** 群组成员 */
-export interface GroupMember {
-  user_id: number
-  role: 'owner' | 'member'
-  nickname: string
-  user_nickname: string
-  avatar_url: string
-  joined_at: string
-}
-
 /** 创建群组 */
 export function createGroup(data: { name: string }) {
   return request<{ id: number; invite_code: string }>({ url: '/groups', method: 'POST', data })
@@ -37,11 +22,6 @@ export function getGroups() {
   return request<Group[]>({ url: '/groups' })
 }
 
-/** 获取群组详情 */
-export function getGroupDetail(id: number) {
-  return request<GroupDetail>({ url: `/groups/${id}` })
-}
-
 /** 加入群组 */
 export function joinGroup(invite_code: string) {
   return request<{ group_id: number; name: string }>({ url: '/groups/join', method: 'POST', data: { invite_code } })

client/src/api/index.ts

@@ -1,5 +0,0 @@
-export * from './auth'
-export * from './transaction'
-export * from './category'
-export * from './budget'
-export * from './stats'

client/src/pages/budget/index.vue

@@ -77,8 +77,8 @@
 import { ref, onMounted } from 'vue'
 import { onShow } from '@dcloudio/uni-app'
 import { useBudgetStore } from '@/stores/budget'
-import { useStatsStore } from '@/stores/stats'
 import { useGroupStore } from '@/stores/group'
+import { getOverview } from '@/api/stats'
 import { waitForReady } from '@/utils/app-ready'
 import { formatAmount, getCurrentMonth } from '@/utils/format'
 import { statusBarHeight } from '@/utils/system'
@@ -87,7 +87,6 @@ import Numpad from '@/components/Numpad/Numpad.vue'
 import Icon from '@/components/Icon/Icon.vue'
 
 const budgetStore = useBudgetStore()
-const statsStore = useStatsStore()
 const groupStore = useGroupStore()
 
 const currentMonth = getCurrentMonth()
@@ -106,7 +105,6 @@ function formatPreset(val: number) {
 
 function syncBudgetData() {
   budget.value = budgetStore.budget
-  monthExpense.value = statsStore.overview.expense
   // 群组模式用 myAmount（个人预算），个人模式用 amount
   budgetAmount.value = budget.value
     ? (groupStore.isGroupMode ? (budget.value.myAmount || 0) : budget.value.amount)
@@ -116,13 +114,19 @@ function syncBudgetData() {
   }
 }
 
+/** 获取个人支出（不传 group_id，始终只算自己的消费） */
+async function fetchMyExpense() {
+  const data = await getOverview({ month: currentMonth, group_id: null })
+  monthExpense.value = Number(data?.expense) || 0
+}
+
 onMounted(async () => {
   await waitForReady()
   loading.value = true
   try {
     await Promise.all([
       budgetStore.fetchBudget(currentMonth),
-      statsStore.fetchOverview(currentMonth)
+      fetchMyExpense()
     ])
     syncBudgetData()
   } catch (e) {
@@ -139,7 +143,7 @@ onShow(async () => {
   try {
     await Promise.all([
       budgetStore.fetchBudget(currentMonth),
-      statsStore.fetchOverview(currentMonth)
+      fetchMyExpense()
     ])
     syncBudgetData()
   } catch {}

client/src/pages/stats/index.vue

@@ -236,7 +236,7 @@ onShow(() => {
 
 // Only re-fetch category/trend on tab switch; re-fetch all on month change
 watch(currentMonth, () => loadData())
-watch(tabType, () => loadTabData())
+watch(tabType, () => loadData(true))
 
 async function loadData(silent = false) {
   const seq = ++loadSeq
@@ -260,26 +260,6 @@ async function loadData(silent = false) {
   }
 }
 
-// Re-fetch all data when tab switches
-async function loadTabData() {
-  const seq = ++loadSeq
-  loadError.value = false
-  try {
-    await Promise.all([
-      statsStore.fetchOverview(currentMonth.value),
-      statsStore.fetchCategoryStats(currentMonth.value, tabType.value),
-      statsStore.fetchTrend(currentMonth.value, tabType.value),
-      fetchMaxSingle(),
-      fetchPrevMonthData()
-    ])
-    if (seq !== loadSeq) return
-  } catch (e) {
-    if (seq !== loadSeq) return
-    console.error('Stats tab load error:', e)
-    loadError.value = true
-  }
-}
-
 async function fetchMaxSingle() {
   try {
     const [y, m] = currentMonth.value.split('-').map(Number)

client/src/stores/budget.ts

@@ -4,24 +4,12 @@ import * as api from '@/api/budget'
 import { getCurrentMonth } from '@/utils/format'
 import { useGroupStore } from '@/stores/group'
 
-// 重新导出类型以保持向后兼容
-export type Budget = api.Budget
-
 export const useBudgetStore = defineStore('budget', () => {
   const budget = ref<api.Budget | null>(null)
-  const loading = ref(false)
 
   async function fetchBudget(month?: string) {
-    loading.value = true
-    try {
     const groupStore = useGroupStore()
     budget.value = await api.getBudget(month || getCurrentMonth(), groupStore.currentGroupId)
-    } catch (err) {
-      budget.value = null
-      throw err
-    } finally {
-      loading.value = false
-    }
   }
 
   async function setBudget(amount: number, month?: string) {
@@ -29,5 +17,5 @@ export const useBudgetStore = defineStore('budget', () => {
     await fetchBudget(month)
   }
 
-  return { budget, loading, fetchBudget, setBudget }
+  return { budget, fetchBudget, setBudget }
 })

client/src/stores/category.ts

@@ -7,17 +7,9 @@ export type Category = api.Category
 
 export const useCategoryStore = defineStore('category', () => {
   const categories = ref<api.Category[]>([])
-  const loading = ref(false)
 
   async function fetchCategories() {
-    loading.value = true
-    try {
     categories.value = await api.getCategories()
-    } catch {
-      categories.value = []
-    } finally {
-      loading.value = false
-    }
   }
 
   function getByType(type: 'expense' | 'income') {
@@ -53,5 +45,5 @@ export const useCategoryStore = defineStore('category', () => {
     await fetchCategories()
   }
 
-  return { categories, loading, fetchCategories, getByType, getById, addCategory, updateCategory, deleteCategory, migrateCategory, sortCategories }
+  return { categories, fetchCategories, getByType, getById, addCategory, updateCategory, deleteCategory, migrateCategory, sortCategories }
 })

client/src/stores/stats.ts

@@ -4,24 +4,26 @@ import * as api from '@/api/stats'
 import { getCurrentMonth } from '@/utils/format'
 import { useGroupStore } from '@/stores/group'
 
-// 重新导出类型以保持向后兼容
+/** 默认概览数据，避免模板中访问属性报错 */
-export type Overview = api.Overview
+const EMPTY_OVERVIEW: api.Overview = {
-export type CategoryStat = api.CategoryStat
+  expense: 0, income: 0, expenseCount: 0, incomeCount: 0,
-export type TrendPoint = api.TrendPoint
+  count: 0, daily: 0, dailyIncome: 0
+}
 
 export const useStatsStore = defineStore('stats', () => {
-  const overview = ref<api.Overview>({ expense: 0, income: 0, expenseCount: 0, incomeCount: 0, count: 0, daily: 0, dailyIncome: 0 })
+  const overview = ref<api.Overview>({ ...EMPTY_OVERVIEW })
   const categoryStats = ref<api.CategoryStat[]>([])
   const trendData = ref<api.TrendPoint[]>([])
-  const loading = ref(false)
+
+  /** 获取当前 group_id，统一收口 */
+  function getGroupId() {
+    return useGroupStore().currentGroupId
+  }
 
   async function fetchOverview(month?: string) {
-    loading.value = true
-    try {
-      const groupStore = useGroupStore()
     const data = await api.getOverview({
       month: month || getCurrentMonth(),
-        group_id: groupStore.currentGroupId
+      group_id: getGroupId()
     })
     overview.value = {
       expense: Number(data?.expense) || 0,
@@ -32,42 +34,24 @@ export const useStatsStore = defineStore('stats', () => {
       daily: Number(data?.daily) || 0,
       dailyIncome: Number(data?.dailyIncome) || 0
     }
-    } catch (err) {
-      overview.value = { expense: 0, income: 0, expenseCount: 0, incomeCount: 0, count: 0, daily: 0, dailyIncome: 0 }
-      throw err
-    } finally {
-      loading.value = false
-    }
   }
 
   async function fetchCategoryStats(month?: string, type: string = 'expense') {
-    try {
+    const data = await api.getCategoryStats(month || getCurrentMonth(), type, getGroupId())
-      const groupStore = useGroupStore()
-      const data = await api.getCategoryStats(month || getCurrentMonth(), type, groupStore.currentGroupId)
     categoryStats.value = Array.isArray(data) ? data.map(item => ({
       ...item,
       amount: Number(item.amount) || 0,
       count: Number(item.count) || 0
     })) : []
-    } catch (err) {
-      categoryStats.value = []
-      throw err
-    }
   }
 
   async function fetchTrend(month?: string, type: string = 'expense') {
-    try {
+    const data = await api.getTrend(month || getCurrentMonth(), type, getGroupId())
-      const groupStore = useGroupStore()
-      const data = await api.getTrend(month || getCurrentMonth(), type, groupStore.currentGroupId)
     trendData.value = Array.isArray(data) ? data.map(item => ({
       ...item,
       amount: Number(item.amount) || 0
     })) : []
-    } catch (err) {
-      trendData.value = []
-      throw err
-    }
   }
 
-  return { overview, categoryStats, trendData, loading, fetchOverview, fetchCategoryStats, fetchTrend }
+  return { overview, categoryStats, trendData, fetchOverview, fetchCategoryStats, fetchTrend }
 })

client/src/stores/transaction.ts

@@ -7,7 +7,6 @@ export const useTransactionStore = defineStore('transaction', () => {
   const transactions = ref<api.Transaction[]>([])
   const total = ref(0)
   const loading = ref(false)
-  const currentPage = ref(1)
 
   async function fetchTransactions(params?: api.TransactionParams) {
     loading.value = true
@@ -67,5 +66,5 @@ export const useTransactionStore = defineStore('transaction', () => {
     }
   }
 
-  return { transactions, total, loading, currentPage, fetchTransactions, addTransaction, updateTransaction, deleteTransaction, fetchTransactionById }
+  return { transactions, total, loading, fetchTransactions, addTransaction, updateTransaction, deleteTransaction, fetchTransactionById }
 })

client/src/stores/user.ts

@@ -5,7 +5,6 @@ import { API_BASE } from '@/config'
 
 export const useUserStore = defineStore('user', () => {
   const userInfo = ref<api.UserInfo | null>(null)
-  const loading = ref(false)
 
   const nickname = computed(() => {
     return userInfo.value?.nickname || uni.getStorageSync('xc:nickname') || '小菜'
@@ -21,19 +20,11 @@ export const useUserStore = defineStore('user', () => {
   })
 
   async function fetchUserInfo() {
-    loading.value = true
-    try {
     userInfo.value = await api.getUserInfo()
     if (userInfo.value) {
       uni.setStorageSync('xc:nickname', userInfo.value.nickname)
       uni.setStorageSync('xc:avatar_url', userInfo.value.avatar_url)
     }
-    } catch (e) {
-      console.error('[UserStore] fetchUserInfo error:', e)
-      throw e
-    } finally {
-      loading.value = false
-    }
   }
 
   async function updateProfile(nickname: string) {
@@ -49,5 +40,5 @@ export const useUserStore = defineStore('user', () => {
     return avatarUrl.value
   }
 
-  return { userInfo, loading, nickname, avatarUrl, fetchUserInfo, updateProfile, uploadAvatar }
+  return { userInfo, nickname, avatarUrl, fetchUserInfo, updateProfile, uploadAvatar }
 })

server/src/routes/group.ts

@@ -86,45 +86,6 @@ router.get('/', async (req: AuthRequest, res: Response) => {
   }
 })
 
-/** 获取群组详情 + 成员列表 */
-router.get('/:id', async (req: AuthRequest, res: Response) => {
-  try {
-    // 验证用户是否是群组成员
-    const [memberCheck] = await pool.query(
-      'SELECT role FROM group_members WHERE group_id = ? AND user_id = ?',
-      [req.params.id, req.userId]
-    )
-    if ((memberCheck as any[]).length === 0) {
-      return res.status(403).json({ code: 40300, message: '无权访问此群组' })
-    }
-
-    const [groupRows] = await pool.query(
-      'SELECT id, name, invite_code, created_by, created_at FROM `groups` WHERE id = ?',
-      [req.params.id]
-    )
-    const group = (groupRows as any[])[0]
-    if (!group) {
-      return res.status(404).json({ code: 40400, message: '群组不存在' })
-    }
-
-    // 获取成员列表
-    const [members] = await pool.query(
-      `SELECT gm.user_id, gm.role, gm.nickname, gm.created_at as joined_at,
-              u.nickname as user_nickname, u.avatar_url
-       FROM group_members gm
-       LEFT JOIN users u ON gm.user_id = u.id
-       WHERE gm.group_id = ?
-       ORDER BY gm.role DESC, gm.created_at ASC`,
-      [req.params.id]
-    )
-
-    res.json({ code: 0, data: { ...group, members } })
-  } catch (err) {
-    console.error('[Group] GET by ID error:', err)
-    res.status(500).json({ code: 50000, message: '服务器错误' })
-  }
-})
-
 /** 通过邀请码加入群组 */
 router.post('/join', async (req: AuthRequest, res: Response) => {
   try {