feat: 迭代三大模块 + 全系统 Bug 修复

新功能：
- 账单筛选统计：多维度筛选面板 + 保存方案 + 结果统计
- 通知公告：系统公告/群组通知/个人提醒 + 通知中心页面
- 管理员后台：数据看板 + 用户管理 + 发布公告

Bug 修复：
- 统计页 fetchPrevMonthData/fetchMaxSingle 添加 group_id
- 群组视图添加 t.group_id 过滤，防止私人数据泄露
- 通知列表添加群组通知条件
- 通知标记已读添加错误处理
- 管理员 API 添加 affectedRows 检查
- 筛选面板金额为 0 时正确回填
- profile onShow 补充 userStore.fetchUserInfo
- 全系统样式修复（overflow/box-sizing）

client/src/pages/bills/index.vue

@@ -11,8 +11,22 @@
         <view class="tab" :class="{ active: filterType === 'expense' }" @tap="switchFilter('expense')">支出</view>
         <view class="tab" :class="{ active: filterType === 'income' }" @tap="switchFilter('income')">收入</view>
       </view>
+      <view class="filter-btn" :class="{ active: hasAdvancedFilter }" @tap="showFilter = true">
+        <Icon name="filter" :size="28" :color="hasAdvancedFilter ? '#FF8C69' : '#8B7E7E'" />
+        <text class="filter-btn-text">筛选</text>
+      </view>
     </view>
 
+    <!-- 筛选结果统计 -->
+    <view class="filter-stats" v-if="hasAdvancedFilter && !loading">
+      <text class="filter-stats-text">共 {{ total }} 笔</text>
+      <text class="filter-stats-text" v-if="filteredExpense > 0">支出 {{ formatAmount(filteredExpense) }}</text>
+      <text class="filter-stats-text" v-if="filteredIncome > 0">收入 {{ formatAmount(filteredIncome) }}</text>
+    </view>
+
+    <!-- 筛选面板 -->
+    <FilterPanel v-if="showFilter" :initialFilters="advancedFilters" @close="showFilter = false" @apply="onFilterApply" />
+
     <view class="tx-list" v-if="!txStore.loading || txList.length > 0">
       <view v-for="group in groupedTx" :key="group.date" class="date-group">
         <view class="group-header">
@@ -81,8 +95,10 @@ import { waitForReady } from '@/utils/app-ready'
 import TransactionItem from '@/components/TransactionItem/TransactionItem.vue'
 import Icon from '@/components/Icon/Icon.vue'
 import Skeleton from '@/components/Skeleton/Skeleton.vue'
+import FilterPanel from './filter-panel.vue'
 import { statusBarHeight } from '@/utils/system'
 import { formatAmount, formatDate } from '@/utils/format'
+import type { FilterParams } from '@/api/filter'
 
 const txStore = useTransactionStore()
 const userStore = useUserStore()
@@ -95,6 +111,16 @@ const total = ref(0)
 const loadError = ref(false)
 let loadSeq = 0 // 请求序号，防止并发覆盖
 
+// 高级筛选
+const showFilter = ref(false)
+const advancedFilters = ref<FilterParams>({})
+const filteredExpense = ref(0)
+const filteredIncome = ref(0)
+const hasAdvancedFilter = computed(() => {
+  const f = advancedFilters.value
+  return !!(f.category_ids?.length || f.startDate || f.endDate || f.minAmount || f.maxAmount || f.keyword)
+})
+
 const noMore = computed(() => txList.value.length >= total.value && total.value > 0)
 
 const groupedTx = computed(() => {
@@ -138,9 +164,17 @@ async function loadTx(reset = false, silent = false) {
   const seq = ++loadSeq
   const params: any = { page: page.value, pageSize }
   if (filterType.value !== 'all') params.type = filterType.value
+  // 合并高级筛选参数
+  const af = advancedFilters.value
+  if (af.category_ids?.length === 1) params.category_id = af.category_ids[0]
+  if (af.startDate) params.startDate = af.startDate
+  if (af.endDate) params.endDate = af.endDate
+  if (af.minAmount) params.minAmount = af.minAmount
+  if (af.maxAmount) params.maxAmount = af.maxAmount
+  if (af.keyword) params.keyword = af.keyword
   try {
     loadError.value = false
-    await txStore.fetchTransactions(params)
+    const data = await txStore.fetchTransactions(params)
     // 丢弃过期请求的结果
     if (seq !== loadSeq) return
     if (reset) {
@@ -149,6 +183,10 @@ async function loadTx(reset = false, silent = false) {
       txList.value = [...txList.value, ...txStore.transactions]
     }
     total.value = txStore.total
+    if (data) {
+      filteredExpense.value = data.filteredExpense || 0
+      filteredIncome.value = data.filteredIncome || 0
+    }
   } catch (e) {
     if (seq !== loadSeq) return
     console.error('Load bills error:', e)
@@ -156,6 +194,12 @@ async function loadTx(reset = false, silent = false) {
   }
 }
 
+function onFilterApply(filters: FilterParams) {
+  advancedFilters.value = filters
+  showFilter.value = false
+  loadTx(true)
+}
+
 function onEdit(item: any) {
   if (groupStore.isGroupMode && item.user_id !== userStore.userInfo?.id) {
     uni.showToast({ title: '只能编辑自己的记录', icon: 'none' })
@@ -227,7 +271,13 @@ onPullDownRefresh(() => {
   padding: 16rpx 0 24rpx;
 }
 
-.tabs-wrap { display: flex; justify-content: center; margin: 0 0 32rpx; }
+.tabs-wrap {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  margin: 0 0 24rpx;
+  gap: 16rpx;
+}
 
 .tabs {
   display: inline-flex;
@@ -251,6 +301,41 @@ onPullDownRefresh(() => {
   }
 }
 
+.filter-btn {
+  display: flex;
+  align-items: center;
+  gap: 6rpx;
+  padding: 12rpx 20rpx;
+  background: #FFF0E6;
+  border-radius: 20rpx;
+  border: 2rpx solid #F0E0D6;
+
+  &.active {
+    border-color: #FF8C69;
+    background: #FFE8E0;
+  }
+
+  &:active { opacity: 0.7; }
+}
+
+.filter-btn-text {
+  font-size: 24rpx;
+  color: #8B7E7E;
+  .active & { color: #FF8C69; }
+}
+
+.filter-stats {
+  display: flex;
+  gap: 24rpx;
+  padding: 0 40rpx 16rpx;
+}
+
+.filter-stats-text {
+  font-size: 24rpx;
+  font-family: 'Fredoka', sans-serif;
+  color: #8B7E7E;
+}
+
 .tx-list { padding: 0 40rpx; }
 
 .date-group {