diff --git a/client/src/api/budget.ts b/client/src/api/budget.ts
index 18725b3..0900a3e 100644
--- a/client/src/api/budget.ts
+++ b/client/src/api/budget.ts
@@ -14,6 +14,6 @@ export function getBudget(month?: string, group_id?: number | null) {
 }
 
 /** 设置预算 */
-export function setBudget(amount: number, month: string) {
-  return request<void>({ url: '/budget', method: 'POST', data: { amount, month } })
+export function setBudget(amount: number, month: string, group_id?: number | null) {
+  return request<void>({ url: '/budget', method: 'POST', data: { amount, month, group_id } })
 }
diff --git a/client/src/api/stats.ts b/client/src/api/stats.ts
index fcdbf5c..1e7e9a3 100644
--- a/client/src/api/stats.ts
+++ b/client/src/api/stats.ts
@@ -43,6 +43,19 @@ export function getTrend(month?: string, type: string = 'expense', group_id?: nu
   return request<TrendPoint[]>({ url: '/stats/trend', data: { month, type, group_id, period } })
 }
 
+/** 聚合统计（一次请求返回 overview + category + trend） */
+export interface DashboardData {
+  overview: Overview
+  category: CategoryStat[]
+  trend: TrendPoint[]
+  month: string
+}
+
+/** 获取聚合统计数据 */
+export function getDashboard(params?: { month?: string; type?: string; period?: 'week' | 'month' | 'year'; group_id?: number | null }) {
+  return request<DashboardData>({ url: '/stats/dashboard', data: params })
+}
+
 /** 智能分类建议结果 */
 export interface CategorySuggestion {
   category: { id: number; name: string; color: string } | null
diff --git a/client/src/components/AmountEditor/AmountEditor.vue b/client/src/components/AmountEditor/AmountEditor.vue
index c234653..f32c013 100644
--- a/client/src/components/AmountEditor/AmountEditor.vue
+++ b/client/src/components/AmountEditor/AmountEditor.vue
@@ -1,17 +1,17 @@
 <template>
   <view class="amount-editor" :class="[`amount-editor--${size}`, { 'amount-editor--focused': innerFocused }]">
-    <view class="amount-display" @tap="focusAtEnd">
+    <view class="amount-display" @tap="!disabled && focusAtEnd()">
       <text class="currency">¥</text>
       <view class="amount-value">
         <template v-if="displayChars.length > 0">
           <template v-for="(char, index) in displayChars" :key="`${char}-${index}`">
             <text v-if="innerFocused && cursorIndex === index" class="cursor"></text>
-            <text class="amount-char" @tap.stop="focusAt(index + 1)">{{ char }}</text>
+            <text class="amount-char" @tap.stop="!disabled && focusAt(index + 1)">{{ char }}</text>
           </template>
           <text v-if="innerFocused && cursorIndex === displayChars.length" class="cursor"></text>
         </template>
         <template v-else>
-          <text class="placeholder" @tap.stop="focusAtEnd">{{ placeholder }}</text>
+          <text class="placeholder" @tap.stop="!disabled && focusAtEnd()">{{ placeholder }}</text>
           <text v-if="innerFocused" class="cursor"></text>
         </template>
       </view>
@@ -23,7 +23,7 @@
       v-model:cursorIndex="cursorIndex"
       :max="max"
       :fixed="fixed"
-      :visible="innerFocused && visible"
+      :visible="innerFocused && visible && !disabled"
       @confirm="emit('confirm')"
     />
   </view>
@@ -43,6 +43,7 @@ const props = withDefaults(defineProps<{
   size?: 'small' | 'medium' | 'large'
   placeholder?: string
   unit?: string
+  disabled?: boolean
 }>(), {
   modelValue: '',
   max: 9999999.99,
@@ -51,7 +52,8 @@ const props = withDefaults(defineProps<{
   autoFocus: true,
   size: 'large',
   placeholder: '0',
-  unit: ''
+  unit: '',
+  disabled: false
 })
 
 const emit = defineEmits<{
@@ -91,6 +93,7 @@ watch(
 )
 
 function focus() {
+  if (props.disabled || !props.visible) return
   cursorIndex.value = innerValue.value.length
   if (!innerFocused.value) {
     innerFocused.value = true
@@ -106,7 +109,7 @@ function blur() {
 }
 
 function focusAt(index: number) {
-  if (!props.visible) return
+  if (props.disabled || !props.visible) return
   cursorIndex.value = clampCursorIndex(innerValue.value, index)
   if (!innerFocused.value) {
     innerFocused.value = true
diff --git a/client/src/components/Snackbar/Snackbar.vue b/client/src/components/Snackbar/Snackbar.vue
new file mode 100644
index 0000000..2e03541
--- /dev/null
+++ b/client/src/components/Snackbar/Snackbar.vue
@@ -0,0 +1,65 @@
+<template>
+  <view class="snackbar" :class="{ show: visible, hide: !visible }">
+    <text class="snackbar-text">{{ message }}</text>
+    <view class="snackbar-action" @tap="$emit('undo')" v-if="showUndo">
+      <text class="snackbar-action-text">撤销</text>
+    </view>
+  </view>
+</template>
+
+<script setup lang="ts">
+withDefaults(defineProps<{
+  visible: boolean
+  message: string
+  showUndo?: boolean
+}>(), { showUndo: true })
+
+defineEmits<{ undo: [] }>()
+</script>
+
+<style lang="scss" scoped>
+.snackbar {
+  position: fixed;
+  bottom: calc(120rpx + env(safe-area-inset-bottom));
+  left: $space-xl;
+  right: $space-xl;
+  background: #333;
+  color: #fff;
+  border-radius: $radius-md;
+  padding: $space-md $space-xl;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  z-index: 999;
+  transform: translateY(200rpx);
+  opacity: 0;
+  transition: all $transition-normal;
+
+  &.show {
+    transform: translateY(0);
+    opacity: 1;
+  }
+
+  &.hide {
+    transform: translateY(200rpx);
+    opacity: 0;
+  }
+}
+
+.snackbar-text {
+  font-size: $font-lg;
+  flex: 1;
+}
+
+.snackbar-action {
+  padding: $space-xs $space-md;
+  border-radius: $radius-xs;
+  &:active { opacity: 0.7; }
+}
+
+.snackbar-action-text {
+  font-size: $font-lg;
+  font-weight: 600;
+  color: $primary;
+}
+</style>
diff --git a/client/src/components/TransactionItem/TransactionItem.vue b/client/src/components/TransactionItem/TransactionItem.vue
index 9d317b5..1af907c 100644
--- a/client/src/components/TransactionItem/TransactionItem.vue
+++ b/client/src/components/TransactionItem/TransactionItem.vue
@@ -1,5 +1,5 @@
 <template>
-  <view class="tx-item-wrap" :class="{ 'show-hint': swipeHint && !disableSwipe }">
+  <view class="tx-item-wrap" :class="{ 'show-hint': swipeHint && !disableSwipe, 'read-only': isOtherCreator }">
     <view
       class="tx-item"
       :style="{ transform: `translateX(${offsetX}rpx)` }"
@@ -16,7 +16,11 @@
         size="sm"
       />
       <view class="info">
-        <text class="name">{{ item.note || item.category_name || '未分类' }}</text>
+        <view class="name-row">
+          <text class="name">{{ item.note || item.category_name || '未分类' }}</text>
+          <!-- 群组模式下非本人记录显示小锁图标 -->
+          <text v-if="isOtherCreator" class="lock-icon">🔒</text>
+        </view>
         <view class="meta">
           <view v-if="isOtherCreator" class="creator-tag">
             <image v-if="creatorAvatarUrl" :src="creatorAvatarUrl" class="creator-mini-avatar" mode="aspectFill" />
@@ -67,8 +71,7 @@ const props = withDefaults(defineProps<{
 
 /** 是否为他人的记录（群组模式下，非本人的才显示创建者信息） */
 const isOtherCreator = computed(() => {
-  if (!props.showCreator || !props.item.creator_nickname) return false
-  return !props.currentUserId || props.item.user_id !== props.currentUserId
+  return !!props.showCreator && !!props.currentUserId && props.item.user_id !== props.currentUserId
 })
 
 defineEmits(['item-tap', 'delete'])
@@ -193,14 +196,29 @@ function onTouchEnd() {
   min-width: 0;
 }
 
+.name-row {
+  display: flex;
+  align-items: center;
+  gap: 8rpx;
+}
+
+.lock-icon {
+  font-size: 24rpx;
+  flex-shrink: 0;
+}
+
 .name {
   font-size: 28rpx;
   font-weight: 500;
   color: $text;
-  display: block;
   @include text-ellipsis;
 }
 
+/* 只读状态：降低整体透明度 */
+.read-only .tx-item {
+  opacity: 0.85;
+}
+
 .meta {
   font-size: 24rpx;
   color: $text-sec;
diff --git a/client/src/composables/usePageReady.ts b/client/src/composables/usePageReady.ts
new file mode 100644
index 0000000..1d5d613
--- /dev/null
+++ b/client/src/composables/usePageReady.ts
@@ -0,0 +1,39 @@
+/**
+ * 页面就绪 composable
+ * 统一处理 waitForReady 超时 + 数据加载错误状态
+ */
+import { ref, onMounted } from 'vue'
+import { waitForReady } from '@/utils/app-ready'
+
+export function usePageReady(onReady: () => Promise<void>) {
+  const readyError = ref(false)
+  const loading = ref(true)
+
+  async function init() {
+    try {
+      await waitForReady()
+    } catch {
+      readyError.value = true
+      loading.value = false
+      return
+    }
+    try {
+      await onReady()
+    } catch (e) {
+      console.error('[PageReady] loadData error:', e)
+    } finally {
+      loading.value = false
+    }
+  }
+
+  /** 重试（用户点击"重新加载"按钮时调用） */
+  async function retry() {
+    readyError.value = false
+    loading.value = true
+    await init()
+  }
+
+  onMounted(init)
+
+  return { readyError, loading, retry }
+}
diff --git a/client/src/pages.json b/client/src/pages.json
index 127e861..f67c7e3 100644
--- a/client/src/pages.json
+++ b/client/src/pages.json
@@ -12,7 +12,8 @@
       "path": "pages/add/index",
       "style": {
         "navigationStyle": "custom",
-        "navigationBarTitleText": "记一笔"
+        "navigationBarTitleText": "记一笔",
+        "enablePullDownRefresh": false
       }
     },
     {
@@ -66,7 +67,8 @@
       "path": "pages/profile-edit/index",
       "style": {
         "navigationStyle": "custom",
-        "navigationBarTitleText": "编辑资料"
+        "navigationBarTitleText": "编辑资料",
+        "enablePullDownRefresh": false
       }
     },
     {
@@ -120,7 +122,8 @@
       "path": "pages/feedback/index",
       "style": {
         "navigationStyle": "custom",
-        "navigationBarTitleText": "意见反馈"
+        "navigationBarTitleText": "意见反馈",
+        "enablePullDownRefresh": false
       }
     },
     {
@@ -184,7 +187,8 @@
     "navigationBarTitleText": "小菜记账",
     "navigationBarBackgroundColor": "#FFF8F0",
     "backgroundColor": "#FFF8F0",
-    "backgroundTextStyle": "dark"
+    "backgroundTextStyle": "dark",
+    "enablePullDownRefresh": true
   },
   "tabBar": {
     "color": "#BFB3B3",
diff --git a/client/src/pages/add/index.vue b/client/src/pages/add/index.vue
index 6b4bafd..f54e6a3 100644
--- a/client/src/pages/add/index.vue
+++ b/client/src/pages/add/index.vue
@@ -6,12 +6,12 @@
         <view class="nav-back" @tap="goBack">
           <Icon name="arrowLeft" :size="36" color="#2D1B1B" />
         </view>
-        <text class="title">{{ editId ? '编辑记录' : '记一笔' }}</text>
+        <text class="title">{{ viewId ? '查看记录' : editId ? '编辑记录' : '记一笔' }}</text>
         <view :style="{ width: capsuleRight + 88 + 'px' }"></view>
       </view>
     </view>
 
-    <view class="type-toggle-wrap">
+    <view class="type-toggle-wrap" v-if="!viewId">
       <view class="type-toggle" :class="{ income: type === 'income' }">
         <view class="slider"></view>
         <view class="tab" :class="{ active: type === 'expense' }" @tap="switchType('expense')">支出</view>
@@ -19,18 +19,26 @@
       </view>
     </view>
 
+    <!-- 只读模式：显示收支类型标签 -->
+    <view class="type-toggle-wrap" v-if="viewId">
+      <view class="readonly-type-badge" :class="type">
+        <text>{{ type === 'expense' ? '支出' : '收入' }}</text>
+      </view>
+    </view>
+
     <AmountEditor
       ref="amountEditorRef"
       v-model="amountStr"
       :fixed="true"
       size="large"
-      :auto-focus="true"
+      :auto-focus="!viewId"
+      :disabled="!!viewId"
       @confirm="save"
     />
 
-    <scroll-view class="category-scroll" scroll-y :scroll-into-view="scrollToCat" @tap="blurAmountEditor">
+    <scroll-view class="category-scroll" scroll-y :scroll-into-view="scrollToCat" @tap="!viewId && blurAmountEditor()">
       <view class="category-grid">
-        <view v-for="cat in currentCategories" :key="cat.id" :id="'cat-' + cat.id" class="cat-item" :class="{ suggested: suggestedCatId === cat.id && selectedCat !== cat.id }" @tap="selectedCat = cat.id">
+        <view v-for="cat in currentCategories" :key="cat.id" :id="'cat-' + cat.id" class="cat-item" :class="{ suggested: suggestedCatId === cat.id && selectedCat !== cat.id, 'cat-readonly': !!viewId }" @tap="!viewId && (selectedCat = cat.id)">
           <view class="cat-icon-wrap">
             <CategoryIcon :label="cat.name[0]" :color="cat.color" :bg-color="cat.color + '15'" size="md" :selected="selectedCat === cat.id" />
             <view v-if="suggestedCatId === cat.id && selectedCat !== cat.id" class="suggest-badge">
@@ -43,17 +51,21 @@
     </scroll-view>
 
     <view class="extra-fields">
-      <picker mode="date" :value="selectedDate" :end="todayStr" @change="onDateChange">
+      <picker v-if="!viewId" mode="date" :value="selectedDate" :end="todayStr" @change="onDateChange">
         <view class="extra-row" @tap="blurAmountEditor">
           <Icon name="calendar" :size="28" color="#8B7E7E" />
           <text class="extra-text">{{ dateLabel }}</text>
         </view>
       </picker>
+      <view v-else class="extra-row">
+        <Icon name="calendar" :size="28" color="#8B7E7E" />
+        <text class="extra-text">{{ dateLabel }}</text>
+      </view>
       <view class="extra-row">
         <Icon name="edit" :size="28" color="#8B7E7E" />
-        <input class="extra-input" v-model="note" placeholder="添加备注..." placeholder-class="placeholder" maxlength="200" @focus="blurAmountEditor" />
+        <input class="extra-input" v-model="note" :disabled="!!viewId" placeholder="添加备注..." placeholder-class="placeholder" maxlength="200" @focus="!viewId && blurAmountEditor()" />
       </view>
-      <view class="extra-row" @tap="openTagPicker">
+      <view class="extra-row" @tap="!viewId && openTagPicker">
         <Icon name="tag" :size="28" color="#8B7E7E" />
         <view class="tag-display">
           <text class="extra-text" v-if="selectedTagIds.length === 0">选择标签（选填）</text>
@@ -70,6 +82,7 @@
 
 
     <SaveSuccess
+      v-if="!viewId"
       v-model:visible="showSuccess"
       :text="editId ? '修改成功' : '记账成功'"
       :showContinue="!editId"
@@ -138,6 +151,7 @@ const localToday = `${now.getFullYear()}-${String(now.getMonth() + 1).padStart(2
 const selectedDate = ref(localToday)
 const saving = ref(false)
 const editId = ref<number | null>(null)
+const viewId = ref<number | null>(null)
 const showSuccess = ref(false)
 const scrollToCat = ref('')
 const todayStr = localToday
@@ -178,7 +192,7 @@ watch([amountStr, note], () => {
   if (suggestTimer) clearTimeout(suggestTimer)
   suggestTimer = setTimeout(async () => {
     const amt = Math.round(parseFloat(amountStr.value || '0') * 100)
-    if (amt <= 0 || editId.value) {
+    if (amt <= 0 || editId.value || viewId.value) {
       suggestedCatId.value = null
       suggestConfidence.value = 0
       return
@@ -189,7 +203,7 @@ watch([amountStr, note], () => {
         suggestedCatId.value = result.category.id
         suggestConfidence.value = result.confidence
         // 置信度 >= 60 时自动选中
-        if (result.confidence >= 60 && !editId.value) {
+        if (result.confidence >= 60 && !editId.value && !viewId.value) {
           selectedCat.value = result.category.id
         }
       } else {
@@ -203,7 +217,13 @@ watch([amountStr, note], () => {
 })
 
 onMounted(async () => {
-  await waitForReady()
+  try {
+    await waitForReady()
+  } catch {
+    uni.showToast({ title: '网络异常，请重试', icon: 'none' })
+    setTimeout(() => uni.navigateBack(), 1200)
+    return
+  }
 
   // 加载分类列表，失败时重试一次
   try {
@@ -253,6 +273,29 @@ onMounted(async () => {
       setTimeout(() => uni.navigateBack(), 1500)
     }
   }
+  // 只读查看模式：群组中非本人记录
+  if (page?.options?.viewId) {
+    viewId.value = Number(page.options.viewId)
+    let existing = txStore.transactions.find(t => t.id === viewId.value)
+    if (!existing) {
+      existing = await txStore.fetchTransactionById(viewId.value!)
+    }
+    if (existing) {
+      type.value = existing.type
+      amountStr.value = (existing.amount / 100).toFixed(2)
+      selectedCat.value = existing.category_id
+      lastCatByType[existing.type] = existing.category_id
+      note.value = existing.note || ''
+      selectedDate.value = existing.date.slice(0, 10)
+      selectedTagIds.value = existing.tags?.map(t => t.id) || []
+      nextTick(() => {
+        setTimeout(() => { scrollToCat.value = 'cat-' + existing.category_id }, 200)
+      })
+    } else {
+      uni.showToast({ title: '记录不存在', icon: 'none' })
+      setTimeout(() => uni.navigateBack(), 1500)
+    }
+  }
   if (currentCategories.value.length > 0 && !selectedCat.value) {
     selectedCat.value = currentCategories.value[0].id
   }
@@ -277,7 +320,7 @@ function blurAmountEditor() {
 }
 
 async function save() {
-  if (saving.value) return
+  if (saving.value || viewId.value) return
   const amount = Math.round(parseFloat(amountStr.value || '0') * 100)
   if (isNaN(amount) || amount <= 0) {
     uni.showToast({ title: '请输入金额', icon: 'none' })
@@ -355,6 +398,11 @@ function getTagById(id: number) {
 function goBack() {
   // 保存成功后直接返回，不弹确认框
   if (showSuccess.value) return
+  // 只读查看模式不应提示放弃编辑
+  if (viewId.value) {
+    uni.navigateBack()
+    return
+  }
   const hasInput = amountStr.value !== '0' || note.value
   if (hasInput) {
     uni.showModal({
@@ -633,5 +681,28 @@ function goBack() {
   width: 100%;
 }
 
+/* 只读模式样式 */
+.readonly-type-badge {
+  display: inline-flex;
+  padding: $space-xs $space-lg;
+  border-radius: $radius-xl;
+  font-size: $font-lg;
+  font-weight: 500;
+
+  &.expense {
+    background: rgba(255, 107, 107, 0.1);
+    color: #FF6B6B;
+  }
+
+  &.income {
+    background: rgba(123, 198, 126, 0.1);
+    color: #7BC67E;
+  }
+}
+
+.cat-readonly {
+  pointer-events: none;
+  opacity: 0.7;
+}
 
 </style>
diff --git a/client/src/pages/admin/config.vue b/client/src/pages/admin/config.vue
index 7c30f95..4c0f7e0 100644
--- a/client/src/pages/admin/config.vue
+++ b/client/src/pages/admin/config.vue
@@ -69,7 +69,7 @@ const form = reactive({
 })
 
 onMounted(async () => {
-  await waitForReady()
+  try { await waitForReady() } catch { /* 超时，继续加载 */ }
   try {
     await loadConfig()
   } catch (e: any) {
diff --git a/client/src/pages/admin/feedback.vue b/client/src/pages/admin/feedback.vue
index 358f791..cc05b65 100644
--- a/client/src/pages/admin/feedback.vue
+++ b/client/src/pages/admin/feedback.vue
@@ -153,7 +153,7 @@ const replyText = ref('')
 const noMore = computed(() => list.value.length >= total.value && total.value > 0)
 
 onMounted(async () => {
-  await waitForReady()
+  try { await waitForReady() } catch { /* 超时，继续加载 */ }
   loadList(true).finally(() => { initialLoaded.value = true })
 })
 
diff --git a/client/src/pages/admin/index.vue b/client/src/pages/admin/index.vue
index ec63dae..e2af055 100644
--- a/client/src/pages/admin/index.vue
+++ b/client/src/pages/admin/index.vue
@@ -137,7 +137,7 @@ const dashboard = ref<Dashboard | null>(null)
 const health = ref<HealthStatus | null>(null)
 
 onMounted(async () => {
-  await waitForReady()
+  try { await waitForReady() } catch { /* 超时，继续加载 */ }
 
   try {
     dashboard.value = await getDashboard()
diff --git a/client/src/pages/admin/logs.vue b/client/src/pages/admin/logs.vue
index 1af2bde..92dd6dd 100644
--- a/client/src/pages/admin/logs.vue
+++ b/client/src/pages/admin/logs.vue
@@ -125,7 +125,7 @@ function getTodayStr(): string {
 }
 
 onMounted(async () => {
-  await waitForReady()
+  try { await waitForReady() } catch { /* 超时，继续加载 */ }
   await Promise.all([loadStats(), loadLogs()])
 })
 
diff --git a/client/src/pages/admin/notifications.vue b/client/src/pages/admin/notifications.vue
index 7d98ded..0d19606 100644
--- a/client/src/pages/admin/notifications.vue
+++ b/client/src/pages/admin/notifications.vue
@@ -197,7 +197,7 @@ const defaultForm = {
 const form = ref({ ...defaultForm })
 
 onMounted(async () => {
-  await waitForReady()
+  try { await waitForReady() } catch { /* 超时，继续加载 */ }
   await loadNotifications(true)
 })
 
diff --git a/client/src/pages/admin/track.vue b/client/src/pages/admin/track.vue
index a719f07..189d5bc 100644
--- a/client/src/pages/admin/track.vue
+++ b/client/src/pages/admin/track.vue
@@ -142,7 +142,7 @@ const total = ref(0)
 const noMore = computed(() => eventList.value.length >= total.value && total.value > 0)
 
 onMounted(async () => {
-  await waitForReady()
+  try { await waitForReady() } catch { /* 超时，继续加载 */ }
   await Promise.all([loadStats(), loadEvents()])
 })
 
diff --git a/client/src/pages/admin/users.vue b/client/src/pages/admin/users.vue
index c0e1b96..02b9253 100644
--- a/client/src/pages/admin/users.vue
+++ b/client/src/pages/admin/users.vue
@@ -74,7 +74,7 @@ const loading = ref(false)
 const initialLoaded = ref(false)
 
 onMounted(async () => {
-  await waitForReady()
+  try { await waitForReady() } catch { /* 超时，继续加载 */ }
   await loadUsers(true)
   initialLoaded.value = true
 })
diff --git a/client/src/pages/backup-manage/index.vue b/client/src/pages/backup-manage/index.vue
index f225c9b..5a767a5 100644
--- a/client/src/pages/backup-manage/index.vue
+++ b/client/src/pages/backup-manage/index.vue
@@ -68,7 +68,7 @@ const creating = ref(false)
 const initialLoaded = ref(false)
 
 onMounted(async () => {
-  await waitForReady()
+  try { await waitForReady() } catch { /* 超时，继续加载 */ }
   await loadBackups()
   initialLoaded.value = true
 })
diff --git a/client/src/pages/bills/index.vue b/client/src/pages/bills/index.vue
index 18987ab..ea16442 100644
--- a/client/src/pages/bills/index.vue
+++ b/client/src/pages/bills/index.vue
@@ -104,6 +104,12 @@
       <Icon name="edit" :size="48" color="#BFB3B3" />
       <text class="state-text">暂无账单记录</text>
     </view>
+
+    <Snackbar
+      :visible="snackbarVisible"
+      :message="snackbarMsg"
+      @undo="onUndoDelete"
+    />
   </view>
 </template>
 
@@ -113,11 +119,13 @@ import { onShow, onReachBottom, onPullDownRefresh } from '@dcloudio/uni-app'
 import { useUserStore } from '@/stores/user'
 import { useGroupStore } from '@/stores/group'
 import { useTagStore } from '@/stores/tag'
+import { useTransactionStore } from '@/stores/transaction'
 import { waitForReady } from '@/utils/app-ready'
-import { getTransactions, deleteTransaction } from '@/api/transaction'
+import { getTransactions } from '@/api/transaction'
 import TransactionItem from '@/components/TransactionItem/TransactionItem.vue'
 import Icon from '@/components/Icon/Icon.vue'
 import Skeleton from '@/components/Skeleton/Skeleton.vue'
+import Snackbar from '@/components/Snackbar/Snackbar.vue'
 import FilterPanel from './filter-panel.vue'
 import { statusBarHeight } from '@/utils/system'
 import { formatAmount, formatDate } from '@/utils/format'
@@ -127,6 +135,7 @@ import type { FilterParams } from '@/api/filter'
 const userStore = useUserStore()
 const groupStore = useGroupStore()
 const tagStore = useTagStore()
+const txStore = useTransactionStore()
 const loading = ref(false)
 const filterType = ref('all')
 const filterTagId = ref<number | null>(null)
@@ -137,6 +146,10 @@ const total = ref(0)
 const loadError = ref(false)
 let loadSeq = 0 // 请求序号，防止并发覆盖
 
+// Snackbar 删除撤销相关
+const snackbarVisible = ref(false)
+const snackbarMsg = ref('')
+
 // 左滑提示：只对首个可删除项显示一次，用户看过后不再重复
 const swipeHintDismissed = ref(false)
 const HINT_KEY = 'xiaocai_swipe_hint_shown'
@@ -197,7 +210,13 @@ const groupedTx = computed(() => {
 const initialLoaded = ref(false)
 
 onMounted(async () => {
-  await waitForReady()
+  try {
+    await waitForReady()
+  } catch {
+    // waitForReady 超时：显示网络异常提示
+    loadError.value = true
+    return
+  }
   tagStore.fetchTags().catch(() => {})
   loadTx(true).finally(() => { initialLoaded.value = true })
 })
@@ -208,6 +227,7 @@ onShow(() => {
 })
 
 function switchFilter(type: string) {
+  if (loading.value) return // 防止重复提交
   filterType.value = type
   loadTx(true)
 }
@@ -260,7 +280,8 @@ function onFilterApply(filters: FilterParams) {
 
 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' })
+    // 非本人记录：进入查看模式（只读）
+    uni.navigateTo({ url: `/pages/add/index?viewId=${item.id}` })
     return
   }
   uni.navigateTo({ url: `/pages/add/index?editId=${item.id}` })
@@ -271,28 +292,30 @@ async function onDelete(item: any) {
     uni.showToast({ title: '只能删除自己的记录', icon: 'none' })
     return
   }
-  uni.showModal({
-    title: '删除记录',
-    content: `确定删除这笔 ${item.type === 'expense' ? '支出' : '收入'} ¥${(item.amount / 100).toFixed(2)}？`,
-    success: async (res) => {
-      if (res.confirm) {
-        try {
-          await deleteTransaction(item.id)
-          txList.value = txList.value.filter(t => t.id !== item.id)
-          total.value--
-          // 更新筛选金额
-          if (item.type === 'expense') {
-            filteredExpense.value = Math.max(0, filteredExpense.value - item.amount)
-          } else {
-            filteredIncome.value = Math.max(0, filteredIncome.value - item.amount)
-          }
-          uni.showToast({ title: '已删除', icon: 'success' })
-        } catch {
-          uni.showToast({ title: '删除失败', icon: 'none' })
-        }
-      }
-    }
-  })
+  // 乐观删除：先从列表移除，显示 Snackbar 供撤销
+  txStore.startDelete(item.id)
+  txList.value = txList.value.filter(t => t.id !== item.id)
+  total.value--
+  // 更新筛选金额
+  if (item.type === 'expense') {
+    filteredExpense.value = Math.max(0, filteredExpense.value - item.amount)
+  } else {
+    filteredIncome.value = Math.max(0, filteredIncome.value - item.amount)
+  }
+  // 显示 Snackbar
+  snackbarMsg.value = '已删除 1 条记录'
+  snackbarVisible.value = true
+  setTimeout(() => {
+    snackbarVisible.value = false
+  }, 3000)
+}
+
+/** 撤销删除 */
+function onUndoDelete() {
+  txStore.cancelDelete()
+  snackbarVisible.value = false
+  // 重新加载以恢复完整列表
+  loadTx(true)
 }
 
 // 触底加载更多
diff --git a/client/src/pages/budget/index.vue b/client/src/pages/budget/index.vue
index 2607658..510c401 100644
--- a/client/src/pages/budget/index.vue
+++ b/client/src/pages/budget/index.vue
@@ -127,7 +127,7 @@ async function fetchMyExpense() {
 }
 
 onMounted(async () => {
-  await waitForReady()
+  try { await waitForReady() } catch { /* 超时，继续加载 */ }
   loading.value = true
   try {
     await budgetStore.fetchBudget(currentMonth)
diff --git a/client/src/pages/category-manage/index.vue b/client/src/pages/category-manage/index.vue
index b863c2f..f557b53 100644
--- a/client/src/pages/category-manage/index.vue
+++ b/client/src/pages/category-manage/index.vue
@@ -138,18 +138,18 @@ const migrateTargets = computed(() => {
 const initialLoaded = ref(false)
 
 onMounted(async () => {
-  await waitForReady()
+  try { await waitForReady() } catch { /* 超时，继续加载 */ }
   await catStore.fetchCategories()
   initialLoaded.value = true
 })
 
-// 返回页面时静默刷新
+// 返回页面时静默刷新（使用缓存）
 onShow(() => {
-  if (initialLoaded.value) catStore.fetchCategories()
+  if (initialLoaded.value) catStore.fetchCategories() // 不强制刷新（使用缓存）
 })
 
 onPullDownRefresh(async () => {
-  await catStore.fetchCategories()
+  await catStore.fetchCategories(true) // 强制刷新
   uni.stopPullDownRefresh()
 })
 
diff --git a/client/src/pages/group-manage/index.vue b/client/src/pages/group-manage/index.vue
index ba108c3..a993665 100644
--- a/client/src/pages/group-manage/index.vue
+++ b/client/src/pages/group-manage/index.vue
@@ -176,7 +176,7 @@ const members = ref<GroupMember[]>([])
 const currentGroup = ref<Group | null>(null)
 
 onMounted(async () => {
-  await waitForReady()
+  try { await waitForReady() } catch { /* 超时，继续加载 */ }
   await groupStore.fetchGroups()
   initialLoaded.value = true
 })
diff --git a/client/src/pages/index/index.vue b/client/src/pages/index/index.vue
index 72ed80b..743d793 100644
--- a/client/src/pages/index/index.vue
+++ b/client/src/pages/index/index.vue
@@ -108,7 +108,17 @@
       <text class="state-text">加载失败，下拉刷新重试</text>
     </view>
 
-    <view class="state-box" v-if="!loading && !loadError && recentTx.length === 0">
+    <!-- 网络异常全屏提示 -->
+    <view class="network-error" v-if="networkError">
+      <Icon name="alert-circle" :size="64" color="#BFB3B3" />
+      <text class="network-error-title">网络连接异常</text>
+      <text class="network-error-desc">请检查网络后点击重试</text>
+      <view class="network-error-btn" @tap="retryNetwork">
+        <text class="network-error-btn-text">重新加载</text>
+      </view>
+    </view>
+
+    <view class="state-box" v-if="!loading && !loadError && !networkError && recentTx.length === 0">
       <Icon name="edit" :size="48" color="#BFB3B3" />
       <text class="state-text">还没有记录，快去记一笔吧</text>
     </view>
@@ -170,6 +180,7 @@ const budget = computed(() => budgetStore.budget)
 const recentTx = ref<Transaction[]>([])
 const loading = ref(true)
 const loadError = ref(false)
+const networkError = ref(false)
 const todayExpense = ref(0)
 const todayIncome = ref(0)
 const todayCount = ref(0)
@@ -205,7 +216,16 @@ function openLink(url: string) {
 }
 
 async function loadData(silent = false) {
-  await waitForReady()
+  try {
+    await waitForReady()
+  } catch {
+    // waitForReady 超时：显示网络异常提示
+    if (!silent) {
+      networkError.value = true
+      loading.value = false
+    }
+    return
+  }
 
   try {
     if (!silent) loading.value = true
@@ -278,7 +298,8 @@ function goNotifications() {
 
 function onTxTap(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' })
+    // 非本人记录：进入查看模式（只读）
+    uni.navigateTo({ url: `/pages/add/index?viewId=${item.id}` })
     return
   }
   uni.navigateTo({ url: `/pages/add/index?editId=${item.id}` })
@@ -287,6 +308,12 @@ function onTxTap(item: any) {
 function goBills() {
   uni.switchTab({ url: '/pages/bills/index' })
 }
+
+/** 网络异常重试 */
+function retryNetwork() {
+  networkError.value = false
+  loadData()
+}
 </script>
 
 <style lang="scss" scoped>
@@ -619,4 +646,41 @@ function goBills() {
   font-weight: 600;
   color: #FF8C69;
 }
+
+/* 网络异常全屏提示 */
+.network-error {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  padding: 120rpx $space-xl;
+  gap: $space-md;
+}
+
+.network-error-title {
+  font-size: $font-2xl;
+  font-weight: 600;
+  color: $text;
+  margin-top: $space-lg;
+}
+
+.network-error-desc {
+  font-size: $font-lg;
+  color: $text-sec;
+}
+
+.network-error-btn {
+  margin-top: $space-lg;
+  padding: $space-md $space-2xl;
+  background: $primary;
+  border-radius: $radius-xl;
+
+  &:active { opacity: 0.8; }
+}
+
+.network-error-btn-text {
+  font-size: $font-lg;
+  font-weight: 600;
+  color: $surface;
+}
 </style>
diff --git a/client/src/pages/notifications/index.vue b/client/src/pages/notifications/index.vue
index 94acc7f..bcc8cfd 100644
--- a/client/src/pages/notifications/index.vue
+++ b/client/src/pages/notifications/index.vue
@@ -121,7 +121,7 @@ let loadSeq = 0
 const noMore = computed(() => list.value.length >= total.value && total.value > 0)
 
 onMounted(async () => {
-  await waitForReady()
+  try { await waitForReady() } catch { /* 超时，继续加载 */ }
   await loadNotifications(true)
   initialLoaded.value = true
 })
diff --git a/client/src/pages/profile-edit/index.vue b/client/src/pages/profile-edit/index.vue
index 38464d6..4a83dc0 100644
--- a/client/src/pages/profile-edit/index.vue
+++ b/client/src/pages/profile-edit/index.vue
@@ -60,7 +60,7 @@ const uploading = ref(false)
 const saving = ref(false)
 
 onMounted(async () => {
-  await waitForReady()
+  try { await waitForReady() } catch { /* 超时，继续加载 */ }
   formNickname.value = userStore.nickname
   formSlogan.value = userStore.slogan
   previewUrl.value = userStore.avatarUrl
diff --git a/client/src/pages/profile/index.vue b/client/src/pages/profile/index.vue
index d1e9576..cfdb458 100644
--- a/client/src/pages/profile/index.vue
+++ b/client/src/pages/profile/index.vue
@@ -274,7 +274,7 @@ async function updateExportCount() {
 }
 
 onMounted(async () => {
-  await waitForReady()
+  try { await waitForReady() } catch { /* 超时，继续加载 */ }
   loading.value = true
   try {
     await Promise.all([
diff --git a/client/src/pages/recurring/index.vue b/client/src/pages/recurring/index.vue
index 5318108..13fcbd1 100644
--- a/client/src/pages/recurring/index.vue
+++ b/client/src/pages/recurring/index.vue
@@ -213,7 +213,7 @@ function getTodayStr(): string {
 }
 
 onMounted(async () => {
-  await waitForReady()
+  try { await waitForReady() } catch { /* 超时，继续加载 */ }
   await Promise.all([loadList(), syncAndLoad()])
 })
 
diff --git a/client/src/pages/stats/index.vue b/client/src/pages/stats/index.vue
index 3b98082..558e0a5 100644
--- a/client/src/pages/stats/index.vue
+++ b/client/src/pages/stats/index.vue
@@ -238,7 +238,7 @@ const monthCompareText = computed(() => {
 const initialLoaded = ref(false)
 
 onMounted(async () => {
-  await waitForReady()
+  try { await waitForReady() } catch { /* 超时，继续加载 */ }
   loadData().finally(() => { initialLoaded.value = true })
 })
 
@@ -258,10 +258,9 @@ async function loadData(silent = false) {
   try {
     if (!silent) loading.value = true
     loadError.value = false
+    // 使用聚合接口一次获取 overview + category + trend，再并行请求额外数据
     await Promise.all([
-      statsStore.fetchOverview(currentMonth.value),
-      statsStore.fetchCategoryStats(currentMonth.value, tabType.value, period.value),
-      statsStore.fetchTrend(currentMonth.value, tabType.value, period.value),
+      statsStore.fetchDashboard(currentMonth.value, tabType.value, period.value),
       fetchMaxSingle(),
       fetchPrevMonthData()
     ])
@@ -279,11 +278,8 @@ async function loadData(silent = false) {
 async function loadTabData() {
   const seq = ++loadSeq
   try {
-    await Promise.all([
-      statsStore.fetchCategoryStats(currentMonth.value, tabType.value, period.value),
-      statsStore.fetchTrend(currentMonth.value, tabType.value, period.value),
-      fetchMaxSingle()
-    ])
+    await statsStore.fetchDashboard(currentMonth.value, tabType.value, period.value)
+    await fetchMaxSingle()
     if (seq !== loadSeq) return
   } catch (e) {
     if (seq !== loadSeq) return
diff --git a/client/src/pages/tag-manage/index.vue b/client/src/pages/tag-manage/index.vue
index 9dbe690..6d13971 100644
--- a/client/src/pages/tag-manage/index.vue
+++ b/client/src/pages/tag-manage/index.vue
@@ -88,7 +88,7 @@ const editModel = ref({ name: '', color: '#FF8C69' })
 const initialLoaded = ref(false)
 
 onMounted(async () => {
-  await waitForReady()
+  try { await waitForReady() } catch { /* 超时，继续加载 */ }
   await tagStore.fetchTags()
   initialLoaded.value = true
 })
diff --git a/client/src/stores/budget.ts b/client/src/stores/budget.ts
index e3faf14..183f48f 100644
--- a/client/src/stores/budget.ts
+++ b/client/src/stores/budget.ts
@@ -13,7 +13,8 @@ export const useBudgetStore = defineStore('budget', () => {
   }
 
   async function setBudget(amount: number, month?: string) {
-    await api.setBudget(amount, month || getCurrentMonth())
+    const groupStore = useGroupStore()
+    await api.setBudget(amount, month || getCurrentMonth(), groupStore.currentGroupId)
     await fetchBudget(month)
   }
 
diff --git a/client/src/stores/category.ts b/client/src/stores/category.ts
index 8d1e112..cedd035 100644
--- a/client/src/stores/category.ts
+++ b/client/src/stores/category.ts
@@ -7,9 +7,20 @@ export type Category = api.Category
 
 export const useCategoryStore = defineStore('category', () => {
   const categories = ref<api.Category[]>([])
+  /** 上次成功获取的时间戳（ms），用于 5 分钟缓存判断 */
+  const lastFetchTime = ref(0)
+  const CACHE_TTL = 5 * 60 * 1000 // 5 分钟
 
-  async function fetchCategories() {
-    categories.value = await api.getCategories()
+  async function fetchCategories(force = false) {
+    if (!force && lastFetchTime.value && Date.now() - lastFetchTime.value < CACHE_TTL) {
+      return // 缓存有效，跳过
+    }
+    try {
+      categories.value = await api.getCategories()
+      lastFetchTime.value = Date.now()
+    } catch {
+      // 保留上次数据
+    }
   }
 
   function getByType(type: 'expense' | 'income') {
@@ -20,31 +31,79 @@ export const useCategoryStore = defineStore('category', () => {
     return categories.value.find(c => c.id === id)
   }
 
+  /** 乐观新增 */
   async function addCategory(data: { name: string; icon: string; color: string; type: 'expense' | 'income' }) {
-    const result = await api.createCategory(data)
-    await fetchCategories()
-    return result.id
+    const tempId = -Date.now()
+    const optimistic: api.Category = { id: tempId, ...data, is_custom: 1, sort_order: 0 }
+    categories.value.push(optimistic)
+    lastFetchTime.value = 0 // 使缓存失效（新增后下次 onShow 会刷新）
+    try {
+      const result = await api.createCategory(data)
+      // 用真实 ID 替换临时 ID
+      const idx = categories.value.findIndex(c => c.id === tempId)
+      if (idx !== -1) categories.value[idx].id = result.id
+      return result.id
+    } catch (err) {
+      // 回滚
+      categories.value = categories.value.filter(c => c.id !== tempId)
+      uni.showToast({ title: '添加失败', icon: 'none' })
+      throw err
+    }
   }
 
+  /** 乐观编辑 */
   async function updateCategory(id: number, data: { name: string; color: string }) {
-    await api.updateCategory(id, data)
-    await fetchCategories()
+    const idx = categories.value.findIndex(c => c.id === id)
+    if (idx === -1) return
+    const backup = { ...categories.value[idx] }
+    Object.assign(categories.value[idx], data)
+    lastFetchTime.value = 0
+    try {
+      await api.updateCategory(id, data)
+    } catch (err) {
+      // 回滚
+      categories.value[idx] = backup
+      uni.showToast({ title: '修改失败', icon: 'none' })
+      throw err
+    }
   }
 
   async function deleteCategory(id: number) {
+    // 删除操作等 API 确认（防误删）
     await api.deleteCategory(id)
-    await fetchCategories()
+    categories.value = categories.value.filter(c => c.id !== id)
+    lastFetchTime.value = 0
   }
 
   async function migrateCategory(fromId: number, toId: number) {
     await api.migrateCategory(fromId, toId)
-    await fetchCategories()
+    categories.value = categories.value.filter(c => c.id !== fromId)
+    lastFetchTime.value = 0
   }
 
+  /** 乐观排序 */
   async function sortCategories(ids: number[]) {
-    await api.sortCategories(ids)
-    await fetchCategories()
+    const backup = [...categories.value]
+    // 按新顺序重排
+    const sorted: api.Category[] = []
+    ids.forEach(id => {
+      const cat = categories.value.find(c => c.id === id)
+      if (cat) sorted.push(cat)
+    })
+    // 保留未参与排序的分类（不同 type 的）
+    categories.value.forEach(c => {
+      if (!ids.includes(c.id)) sorted.push(c)
+    })
+    categories.value = sorted
+    try {
+      await api.sortCategories(ids)
+    } catch (err) {
+      // 回滚
+      categories.value = backup
+      uni.showToast({ title: '排序失败', icon: 'none' })
+      throw err
+    }
   }
 
-  return { categories, fetchCategories, getByType, getById, addCategory, updateCategory, deleteCategory, migrateCategory, sortCategories }
+  return { categories, lastFetchTime, fetchCategories, getByType, getById, addCategory, updateCategory, deleteCategory, migrateCategory, sortCategories }
 })
diff --git a/client/src/stores/group.ts b/client/src/stores/group.ts
index 3bb761c..96d8168 100644
--- a/client/src/stores/group.ts
+++ b/client/src/stores/group.ts
@@ -35,14 +35,17 @@ export const useGroupStore = defineStore('group', () => {
     await refreshAll()
   }
 
-  /** 切换身份后全局刷新所有数据（串行执行避免数据错乱） */
+  /** 切换身份后全局刷新所有数据（无依赖关系的可并行） */
   async function refreshAll() {
     const statsStore = useStatsStore()
     const budgetStore = useBudgetStore()
     const txStore = useTransactionStore()
-    await statsStore.fetchOverview()
-    await budgetStore.fetchBudget()
-    await txStore.fetchTransactions({ page: 1 })
+    // stats、budget、transactions 互相独立，可以并行
+    await Promise.all([
+      statsStore.fetchOverview(),
+      budgetStore.fetchBudget(),
+      txStore.fetchTransactions({ page: 1 })
+    ])
   }
 
   /** 获取群组列表 */
diff --git a/client/src/stores/notification.ts b/client/src/stores/notification.ts
index 0dbb2ae..9a7d71d 100644
--- a/client/src/stores/notification.ts
+++ b/client/src/stores/notification.ts
@@ -6,11 +6,18 @@ import type { Notification } from '@/api/notification'
 export const useNotificationStore = defineStore('notification', () => {
   const unreadCount = ref(0)
   const urgentNotifications = ref<Notification[]>([])
+  /** 上次获取未读计数的时间戳 */
+  const lastCountFetchTime = ref(0)
+  const COUNT_CACHE_TTL = 30 * 1000 // 30 秒
 
-  async function fetchUnreadCount() {
+  async function fetchUnreadCount(force = false) {
+    if (!force && lastCountFetchTime.value && Date.now() - lastCountFetchTime.value < COUNT_CACHE_TTL) {
+      return
+    }
     try {
       const data = await api.getUnreadCount()
       unreadCount.value = data.count
+      lastCountFetchTime.value = Date.now()
     } catch {
       // 静默失败，不影响页面
     }
@@ -46,5 +53,5 @@ export const useNotificationStore = defineStore('notification', () => {
     }
   }
 
-  return { unreadCount, urgentNotifications, fetchUnreadCount, fetchUrgentNotifications, markRead, markAllRead }
+  return { unreadCount, urgentNotifications, lastCountFetchTime, fetchUnreadCount, fetchUrgentNotifications, markRead, markAllRead }
 })
diff --git a/client/src/stores/stats.ts b/client/src/stores/stats.ts
index 8dbe8ae..414db15 100644
--- a/client/src/stores/stats.ts
+++ b/client/src/stores/stats.ts
@@ -53,5 +53,36 @@ export const useStatsStore = defineStore('stats', () => {
     })) : []
   }
 
-  return { overview, categoryStats, trendData, fetchOverview, fetchCategoryStats, fetchTrend }
+  /** 聚合接口：一次请求返回 overview + category + trend，减少 HTTP 往返 */
+  async function fetchDashboard(month?: string, type: string = 'expense', period?: 'week' | 'month' | 'year') {
+    const data = await api.getDashboard({
+      month: month || getCurrentMonth(),
+      type,
+      period,
+      group_id: getGroupId()
+    })
+    if (data) {
+      const ov = data.overview || EMPTY_OVERVIEW
+      overview.value = {
+        expense: Number(ov.expense) || 0,
+        income: Number(ov.income) || 0,
+        expenseCount: Number(ov.expenseCount) || 0,
+        incomeCount: Number(ov.incomeCount) || 0,
+        count: Number(ov.count) || 0,
+        daily: Number(ov.daily) || 0,
+        dailyIncome: Number(ov.dailyIncome) || 0
+      }
+      categoryStats.value = Array.isArray(data.category) ? data.category.map(item => ({
+        ...item,
+        amount: Number(item.amount) || 0,
+        count: Number(item.count) || 0
+      })) : []
+      trendData.value = Array.isArray(data.trend) ? data.trend.map(item => ({
+        ...item,
+        amount: Number(item.amount) || 0
+      })) : []
+    }
+  }
+
+  return { overview, categoryStats, trendData, fetchOverview, fetchCategoryStats, fetchTrend, fetchDashboard }
 })
diff --git a/client/src/stores/tag.ts b/client/src/stores/tag.ts
index 375576a..6a3e289 100644
--- a/client/src/stores/tag.ts
+++ b/client/src/stores/tag.ts
@@ -5,13 +5,20 @@ import * as api from '@/api/tag'
 export const useTagStore = defineStore('tag', () => {
   const tags = ref<api.Tag[]>([])
   const loading = ref(false)
+  /** 上次成功获取的时间戳（ms），用于 5 分钟缓存判断 */
+  const lastFetchTime = ref(0)
+  const CACHE_TTL = 5 * 60 * 1000 // 5 分钟
 
   /** 获取标签列表 */
-  async function fetchTags() {
+  async function fetchTags(force = false) {
+    if (!force && lastFetchTime.value && Date.now() - lastFetchTime.value < CACHE_TTL) {
+      return // 缓存有效，跳过
+    }
     loading.value = true
     try {
       const data = await api.getTags()
       tags.value = Array.isArray(data) ? data : []
+      lastFetchTime.value = Date.now()
     } catch {
       tags.value = []
     } finally {
@@ -19,23 +26,48 @@ export const useTagStore = defineStore('tag', () => {
     }
   }
 
-  /** 创建标签 */
+  /** 乐观创建标签 */
   async function addTag(data: { name: string; color: string }) {
-    const result = await api.createTag(data)
-    await fetchTags()
-    return result.id
+    const tempId = -Date.now()
+    const optimistic: api.Tag = { id: tempId, name: data.name, color: data.color, created_at: new Date().toISOString() }
+    tags.value.push(optimistic)
+    lastFetchTime.value = 0 // 使缓存失效
+    try {
+      const result = await api.createTag(data)
+      // 用真实 ID 替换临时 ID
+      const idx = tags.value.findIndex(t => t.id === tempId)
+      if (idx !== -1) tags.value[idx].id = result.id
+      return result.id
+    } catch (err) {
+      // 回滚
+      tags.value = tags.value.filter(t => t.id !== tempId)
+      uni.showToast({ title: '添加失败', icon: 'none' })
+      throw err
+    }
   }
 
-  /** 更新标签 */
+  /** 乐观更新标签 */
   async function updateTag(id: number, data: { name?: string; color?: string }) {
-    await api.updateTag(id, data)
-    await fetchTags()
+    const idx = tags.value.findIndex(t => t.id === id)
+    if (idx === -1) return
+    const backup = { ...tags.value[idx] }
+    Object.assign(tags.value[idx], data)
+    lastFetchTime.value = 0
+    try {
+      await api.updateTag(id, data)
+    } catch (err) {
+      // 回滚
+      tags.value[idx] = backup
+      uni.showToast({ title: '修改失败', icon: 'none' })
+      throw err
+    }
   }
 
   /** 删除标签 */
   async function deleteTag(id: number) {
     await api.deleteTag(id)
-    await fetchTags()
+    tags.value = tags.value.filter(t => t.id !== id)
+    lastFetchTime.value = 0
   }
 
   /** 根据 ID 获取标签 */
@@ -48,5 +80,5 @@ export const useTagStore = defineStore('tag', () => {
     return tags.value.filter(t => ids.includes(t.id))
   }
 
-  return { tags, loading, fetchTags, addTag, updateTag, deleteTag, getById, getByIds }
+  return { tags, loading, lastFetchTime, fetchTags, addTag, updateTag, deleteTag, getById, getByIds }
 })
diff --git a/client/src/stores/transaction.ts b/client/src/stores/transaction.ts
index 7ca9e9f..afb521a 100644
--- a/client/src/stores/transaction.ts
+++ b/client/src/stores/transaction.ts
@@ -8,6 +8,9 @@ export const useTransactionStore = defineStore('transaction', () => {
   const total = ref(0)
   const loading = ref(false)
 
+  // 待确认删除：{ id: 被删除的交易ID, item: 被删除的交易对象, index: 在列表中的位置, timer: 定时器句柄 }
+  const pendingDelete = ref<{ id: number; item: api.Transaction; index: number; timer: number } | null>(null)
+
   async function fetchTransactions(params?: api.TransactionParams) {
     loading.value = true
     try {
@@ -65,5 +68,52 @@ export const useTransactionStore = defineStore('transaction', () => {
     }
   }
 
-  return { transactions, total, loading, fetchTransactions, addTransaction, updateTransaction, deleteTransaction, fetchTransactionById }
+  /** 开始删除（乐观：先从列表移除，3秒内可撤销） */
+  function startDelete(id: number) {
+    // 如果有上一条待确认删除，立即确认（不能同时有两条）
+    if (pendingDelete.value) {
+      confirmDelete()
+    }
+
+    const idx = transactions.value.findIndex(t => t.id === id)
+    if (idx === -1) return
+
+    const item = transactions.value[idx]
+    transactions.value.splice(idx, 1)
+
+    const timer = setTimeout(() => {
+      confirmDelete()
+    }, 3000) as unknown as number
+
+    pendingDelete.value = { id, item, index: idx, timer }
+  }
+
+  /** 撤销删除（恢复到原位置） */
+  function cancelDelete() {
+    if (!pendingDelete.value) return
+    const { item, index, timer } = pendingDelete.value
+    clearTimeout(timer)
+    // 插回原位置
+    transactions.value.splice(index, 0, item)
+    pendingDelete.value = null
+  }
+
+  /** 确认删除（实际调接口） */
+  async function confirmDelete() {
+    if (!pendingDelete.value) return
+    const { id, index, timer } = pendingDelete.value
+    const item = pendingDelete.value.item
+    clearTimeout(timer)
+    pendingDelete.value = null
+
+    try {
+      await api.deleteTransaction(id)
+    } catch {
+      // 接口失败，恢复
+      transactions.value.splice(index, 0, item)
+      uni.showToast({ title: '删除失败', icon: 'none' })
+    }
+  }
+
+  return { transactions, total, loading, pendingDelete, fetchTransactions, addTransaction, updateTransaction, deleteTransaction, fetchTransactionById, startDelete, cancelDelete, confirmDelete }
 })
diff --git a/client/src/utils/app-ready.ts b/client/src/utils/app-ready.ts
index 2217527..598648e 100644
--- a/client/src/utils/app-ready.ts
+++ b/client/src/utils/app-ready.ts
@@ -6,15 +6,19 @@
  */
 
 let _resolve: () => void
-const _ready = new Promise<void>(resolve => { _resolve = resolve })
+let _reject: (err: Error) => void
+const _ready = new Promise<void>((resolve, reject) => {
+  _resolve = resolve
+  _reject = reject
+})
 
 /** 标记 App 启动完成（登录成功） */
 export function markReady() { _resolve() }
 
-/** 等待 App 就绪，最多等 8 秒超时（小程序登录可能较慢） */
+/** 等待 App 就绪，最多等 8 秒超时 */
 export function waitForReady(): Promise<void> {
   return Promise.race([
     _ready,
-    new Promise<void>(resolve => setTimeout(resolve, 8000))
+    new Promise<void>((_, reject) => setTimeout(() => reject(new Error('App ready timeout')), 8000))
   ])
 }
diff --git a/client/src/utils/tracker.ts b/client/src/utils/tracker.ts
index ba34f50..8a7e3ab 100644
--- a/client/src/utils/tracker.ts
+++ b/client/src/utils/tracker.ts
@@ -14,8 +14,8 @@ interface TrackEvent {
 /** 上报队列（批量上报，减少请求） */
 let eventQueue: TrackEvent[] = []
 let flushTimer: number | null = null
-const FLUSH_INTERVAL = 5000 // 5秒上报一次
-const MAX_QUEUE_SIZE = 20
+const FLUSH_INTERVAL = 500 // 500ms 攒批
+const MAX_QUEUE_SIZE = 10   // 10 条立即发送
 
 /** 获取当前页面路径 */
 function getCurrentPage(): string {
diff --git a/server/src/routes/admin.ts b/server/src/routes/admin.ts
index 72ff7f0..b52e4b2 100644
--- a/server/src/routes/admin.ts
+++ b/server/src/routes/admin.ts
@@ -83,10 +83,13 @@ router.get('/users', async (req: AuthRequest, res: Response) => {
 
     const [rows] = await pool.query(
       `SELECT u.id, u.nickname, u.avatar_url, u.role, u.created_at,
-              (SELECT COUNT(*) FROM transactions WHERE user_id = u.id) as tx_count,
-              (SELECT COUNT(*) FROM group_members WHERE user_id = u.id) as group_count
+              COUNT(DISTINCT t.id) as tx_count,
+              COUNT(DISTINCT gm.group_id) as group_count
        FROM users u
+       LEFT JOIN transactions t ON t.user_id = u.id
+       LEFT JOIN group_members gm ON gm.user_id = u.id
        ${where}
+       GROUP BY u.id, u.nickname, u.avatar_url, u.role, u.created_at
        ORDER BY u.created_at DESC
        LIMIT ? OFFSET ?`,
       [...params, pSize, offset]
diff --git a/server/src/routes/budget.ts b/server/src/routes/budget.ts
index b26abb4..bcf00b8 100644
--- a/server/src/routes/budget.ts
+++ b/server/src/routes/budget.ts
@@ -63,12 +63,23 @@ router.get('/', async (req: AuthRequest, res: Response) => {
 
 router.post('/', async (req: AuthRequest, res: Response) => {
   try {
-    const { amount, month } = req.body
+    const { amount, month, group_id } = req.body
     if (amount === undefined || amount === null || typeof amount !== 'number' || !Number.isInteger(amount) || amount <= 0 || amount > 999999999) {
       return res.status(400).json({ code: 40001, message: '金额必须为1-999999999之间的正整数（单位：分）' })
     }
     const m = validateMonth(month || getCurrentMonth())
 
+    // 群组模式下验证成员身份
+    if (group_id && group_id !== 'null') {
+      const [memberCheck] = await pool.query(
+        'SELECT id FROM group_members WHERE group_id = ? AND user_id = ?',
+        [group_id, req.userId]
+      )
+      if ((memberCheck as any[]).length === 0) {
+        return res.status(403).json({ code: 40300, message: '无权操作此群组' })
+      }
+    }
+
     await pool.query(
       'INSERT INTO budgets (user_id, amount, month) VALUES (?, ?, ?) ON DUPLICATE KEY UPDATE amount = ?',
       [req.userId, amount, m, amount]
diff --git a/server/src/routes/stats.ts b/server/src/routes/stats.ts
index d68a24f..fe5fe17 100644
--- a/server/src/routes/stats.ts
+++ b/server/src/routes/stats.ts
@@ -335,4 +335,130 @@ router.get('/suggest-category', async (req: AuthRequest, res: Response) => {
   }
 })
 
+/** 聚合统计接口：一次请求返回 overview + category + trend */
+router.get('/dashboard', async (req: AuthRequest, res: Response) => {
+  try {
+    const { month, type = 'expense', period = 'month', group_id } = req.query
+
+    if (!VALID_TYPES.includes(type as string)) {
+      return res.status(400).json({ code: 40001, message: '类型无效' })
+    }
+    if (!VALID_PERIODS.includes(period as string)) {
+      return res.status(400).json({ code: 40001, message: 'period参数无效' })
+    }
+
+    const now = new Date()
+    const m = (month as string) || getCurrentMonth()
+
+    let startDate: string
+    let endDate: string
+    let groupBy: string
+    let labelExpr: string
+    let elapsedDays = 1
+
+    if (period === 'week') {
+      const dayOfWeek = now.getDay() || 7
+      const monday = new Date(now)
+      monday.setDate(now.getDate() - dayOfWeek + 1)
+      const sunday = new Date(monday)
+      sunday.setDate(monday.getDate() + 6)
+      startDate = monday.toISOString().slice(0, 10)
+      endDate = sunday.toISOString().slice(0, 10)
+      elapsedDays = 7
+      groupBy = 't.date'
+      labelExpr = `CASE DAYOFWEEK(t.date)
+        WHEN 1 THEN '周日'
+        WHEN 2 THEN '周一'
+        WHEN 3 THEN '周二'
+        WHEN 4 THEN '周三'
+        WHEN 5 THEN '周四'
+        WHEN 6 THEN '周五'
+        WHEN 7 THEN '周六'
+      END`
+    } else if (period === 'year') {
+      const year = m.split('-')[0] || String(now.getFullYear())
+      startDate = `${year}-01-01`
+      endDate = `${year}-12-31`
+      elapsedDays = year === String(now.getFullYear()) ? Math.max(1, Math.ceil((now.getTime() - new Date(startDate).getTime()) / 86400000) + 1) : 365
+      groupBy = "DATE_FORMAT(t.date, '%Y-%m')"
+      labelExpr = `CONCAT(MONTH(t.date), '月')`
+    } else {
+      // month（默认）
+      const range = getMonthRange(m)
+      if (!range) return res.status(400).json({ code: 40001, message: '月份格式无效' })
+      startDate = range.startDate
+      endDate = range.endDate
+      const [year, mon] = m.split('-').map(Number)
+      const isCurrentMonth = year === now.getFullYear() && mon === now.getMonth() + 1
+      elapsedDays = isCurrentMonth ? now.getDate() : new Date(year, mon, 0).getDate()
+      groupBy = 't.date'
+      labelExpr = `CONCAT(DAY(t.date), '日')`
+    }
+
+    // 验证 group_id 一次即可
+    const whereBase = await buildWhereClause(req.userId, group_id as string | undefined, ['t.date >= ?', 't.date <= ?'])
+    if (!whereBase) return res.status(403).json({ code: 40300, message: '无权访问此群组' })
+
+    const whereTyped = await buildWhereClause(req.userId, group_id as string | undefined, ['t.type = ?', 't.date >= ?', 't.date <= ?'])
+    if (!whereTyped) return res.status(403).json({ code: 40300, message: '无权访问此群组' })
+
+    // 三个查询并行执行
+    const [overviewRes, categoryRes, trendRes] = await Promise.all([
+      pool.query(
+        `SELECT
+          COALESCE(SUM(CASE WHEN t.type = 'expense' THEN t.amount ELSE 0 END), 0) as expense,
+          COALESCE(SUM(CASE WHEN t.type = 'income' THEN t.amount ELSE 0 END), 0) as income,
+          COUNT(*) as count,
+          SUM(CASE WHEN t.type = 'expense' THEN 1 ELSE 0 END) as expenseCount,
+          SUM(CASE WHEN t.type = 'income' THEN 1 ELSE 0 END) as incomeCount
+         FROM transactions t ${whereBase.where}`,
+        [...whereBase.params, startDate, endDate]
+      ),
+      pool.query(
+        `SELECT c.id, COALESCE(c.name, '未分类') as name, COALESCE(c.icon, '?') as icon, COALESCE(c.color, '#BFB3B3') as color, SUM(t.amount) as amount, COUNT(t.id) as count
+         FROM transactions t
+         LEFT JOIN categories c ON t.category_id = c.id
+         ${whereTyped.where}
+         GROUP BY c.id, c.name, c.icon, c.color
+         ORDER BY amount DESC
+         LIMIT 10`,
+        [...whereTyped.params, type, startDate, endDate]
+      ),
+      pool.query(
+        `SELECT DATE_FORMAT(t.date, '%Y-%m-%d') as date, ${labelExpr} as label, SUM(t.amount) as amount
+         FROM transactions t
+         ${whereTyped.where}
+         GROUP BY ${groupBy}
+         ORDER BY t.date`,
+        [...whereTyped.params, type, startDate, endDate]
+      )
+    ])
+
+    const overviewRow = (overviewRes[0] as any[])[0]
+    const daily = elapsedDays > 0 ? Math.round(overviewRow.expense / elapsedDays) : 0
+    const dailyIncome = elapsedDays > 0 ? Math.round(overviewRow.income / elapsedDays) : 0
+
+    res.json({
+      code: 0,
+      data: {
+        overview: {
+          expense: overviewRow.expense,
+          income: overviewRow.income,
+          count: overviewRow.count,
+          daily,
+          dailyIncome,
+          expenseCount: overviewRow.expenseCount,
+          incomeCount: overviewRow.incomeCount
+        },
+        category: categoryRes[0],
+        trend: trendRes[0],
+        month: m
+      }
+    })
+  } catch (err) {
+    console.error('[Stats] dashboard error:', err)
+    res.status(500).json({ code: 50000, message: '服务器错误' })
+  }
+})
+
 export default router
diff --git a/server/src/routes/track.ts b/server/src/routes/track.ts
index 1879790..fac89e7 100644
--- a/server/src/routes/track.ts
+++ b/server/src/routes/track.ts
@@ -13,15 +13,21 @@ router.post('/', async (req, res) => {
       return res.status(400).json({ code: 40001, message: '无效的埋点数据' })
     }
 
-    // 批量插入埋点事件（限制每个事件的字段长度）
-    for (const event of events.slice(0, 50)) { // 最多 50 个事件
-      const eventType = typeof event.event === 'string' ? event.event.slice(0, 50) : 'unknown'
-      const page = typeof event.page === 'string' ? event.page.slice(0, 200) : ''
-      const data = event.data && typeof event.data === 'object' ? event.data : {}
+    const validEvents = events.slice(0, 50).map(event => ({
+      event: typeof event.event === 'string' ? event.event.slice(0, 50) : 'unknown',
+      page: typeof event.page === 'string' ? event.page.slice(0, 200) : '',
+      data: event.data && typeof event.data === 'object' ? JSON.stringify(event.data) : '{}',
+      userId
+    }))
 
-      await pool.execute(
-        'INSERT INTO track_events (event, page, data, user_id) VALUES (?, ?, ?, ?)',
-        [eventType, page, JSON.stringify(data), userId]
+    if (validEvents.length > 0) {
+      // 批量 INSERT
+      const placeholders = validEvents.map(() => '(?, ?, ?, ?)').join(', ')
+      const values: any[] = []
+      validEvents.forEach(e => values.push(e.event, e.page, e.data, e.userId))
+      await pool.query(
+        `INSERT INTO track_events (event, page, data, user_id) VALUES ${placeholders}`,
+        values
       )
     }