feat: onShow静默刷新 + 群组预算双显 + TransactionItem优化

onShow 静默刷新（首次有loading，后续静默）:
- budget: 添加 initialLoaded 守卫，避免首次双重请求
- profile: 添加 onShow 刷新概览/预算/账单/群组
- group-manage: 添加 onShow 刷新群组列表
- category-manage: 添加 onShow 刷新分类列表
- add: 添加 onShow 刷新分类（可能新增了分类）

群组模式预算双显:
- 服务端 GET /budget 群组模式额外返回 myAmount（本人预算）
- 客户端 Budget 类型添加 myAmount 字段
- 预算页群组模式：群组总预算卡片（只读）+ 我的预算卡片（可编辑）
- 个人模式保持原样

TransactionItem 群组模式优化:
- 主图标始终显示分类图标（不再显示创建者头像）
- 他人记录在昵称旁显示小头像（28rpx圆形）

client/src/pages/add/index.vue

@@ -55,6 +55,7 @@
 
 <script setup lang="ts">
 import { ref, computed, watch, onMounted, nextTick } from 'vue'
+import { onShow } from '@dcloudio/uni-app'
 import { useCategoryStore } from '@/stores/category'
 import { useTransactionStore } from '@/stores/transaction'
 import { waitForReady } from '@/utils/app-ready'
@@ -150,6 +151,11 @@ onMounted(async () => {
   }
 })
 
+// 返回页面时刷新分类（可能新增了分类）
+onShow(() => {
+  catStore.fetchCategories()
+})
+
 function onDateChange(e: any) {
   selectedDate.value = e.detail.value
 }

client/src/pages/budget/index.vue

@@ -12,27 +12,45 @@
     </view>
 
     <view class="content">
-      <!-- 当前预算预览 -->
-      <view class="preview-card">
+      <!-- 群组模式：群组总预算（只读） -->
+      <view class="preview-card" v-if="groupStore.isGroupMode && !loading">
         <view class="preview-header">
-          <text class="preview-label">本月预算</text>
+          <text class="preview-label">群组预算</text>
           <text class="preview-month">{{ currentMonth }}</text>
         </view>
-        <text class="preview-amount" v-if="!loading">
+        <text class="preview-amount">
           {{ budget ? formatAmount(budget.amount) : '未设置' }}
         </text>
-        <view class="preview-skeleton" v-else></view>
         <BudgetBar
           v-if="budget"
           :total="budget.amount"
           :used="monthExpense"
           :showLabel="true"
         />
+        <text class="preview-hint" v-else>群组成员均未设置预算</text>
+      </view>
+
+      <!-- 我的预算 / 个人模式预算 -->
+      <view class="preview-card">
+        <view class="preview-header">
+          <text class="preview-label">{{ groupStore.isGroupMode ? '我的预算' : '本月预算' }}</text>
+          <text class="preview-month">{{ currentMonth }}</text>
+        </view>
+        <text class="preview-amount" v-if="!loading">
+          {{ myBudgetAmount > 0 ? formatAmount(myBudgetAmount) : '未设置' }}
+        </text>
+        <view class="preview-skeleton" v-else></view>
+        <BudgetBar
+          v-if="myBudgetAmount > 0"
+          :total="myBudgetAmount"
+          :used="myExpense"
+          :showLabel="true"
+        />
         <text class="preview-hint" v-else>设置预算，掌控开支</text>
       </view>
 
       <!-- 快捷金额 -->
-      <view class="section-title">快捷金额</view>
+      <view class="section-title">{{ groupStore.isGroupMode ? '设置我的预算' : '快捷金额' }}</view>
       <view class="preset-grid">
         <view
           class="preset-item"
@@ -65,6 +83,7 @@ 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 { waitForReady } from '@/utils/app-ready'
 import { formatAmount, getCurrentMonth } from '@/utils/format'
 import { statusBarHeight } from '@/utils/system'
@@ -74,11 +93,15 @@ import Icon from '@/components/Icon/Icon.vue'
 
 const budgetStore = useBudgetStore()
 const statsStore = useStatsStore()
+const groupStore = useGroupStore()
 
 const currentMonth = getCurrentMonth()
 const budget = ref<any>(null)
 const monthExpense = ref(0)
+const myBudgetAmount = ref(0)
+const myExpense = ref(0)
 const loading = ref(true)
+const initialLoaded = ref(false)
 const amountStr = ref('')
 
 const presets = [1000, 2000, 3000, 5000, 10000]
@@ -87,6 +110,23 @@ function formatPreset(val: number) {
   return val >= 10000 ? (val / 10000) + '万' : val.toLocaleString()
 }
 
+function syncBudgetData() {
+  budget.value = budgetStore.budget
+  monthExpense.value = statsStore.overview.expense
+  // 群组模式用 myAmount，个人模式用 amount
+  if (budget.value) {
+    myBudgetAmount.value = groupStore.isGroupMode ? (budget.value.myAmount || 0) : budget.value.amount
+    myExpense.value = groupStore.isGroupMode ? statsStore.overview.expense : statsStore.overview.expense
+  } else {
+    myBudgetAmount.value = 0
+    myExpense.value = 0
+  }
+  // 预填输入框（个人预算）
+  if (myBudgetAmount.value > 0) {
+    amountStr.value = (myBudgetAmount.value / 100).toString()
+  }
+}
+
 onMounted(async () => {
   await waitForReady()
   loading.value = true
@@ -95,27 +135,24 @@ onMounted(async () => {
       budgetStore.fetchBudget(currentMonth),
       statsStore.fetchOverview(currentMonth)
     ])
-    budget.value = budgetStore.budget
-    monthExpense.value = statsStore.overview.expense
-    if (budget.value) {
-      amountStr.value = (budget.value.amount / 100).toString()
-    }
+    syncBudgetData()
   } catch (e) {
     console.error('Budget page load error:', e)
   } finally {
     loading.value = false
+    initialLoaded.value = true
   }
 })
 
-// 返回页面时刷新预算数据
+// 返回页面时静默刷新
 onShow(async () => {
+  if (!initialLoaded.value) return
   try {
     await Promise.all([
       budgetStore.fetchBudget(currentMonth),
       statsStore.fetchOverview(currentMonth)
     ])
-    budget.value = budgetStore.budget
-    monthExpense.value = statsStore.overview.expense
+    syncBudgetData()
   } catch {}
 })
 
@@ -135,7 +172,7 @@ async function onConfirm() {
   }
   try {
     await budgetStore.setBudget(amount, currentMonth)
-    budget.value = budgetStore.budget
+    syncBudgetData()
     uni.showToast({ title: '预算已设置', icon: 'success' })
     setTimeout(() => uni.navigateBack(), 1500)
   } catch {

client/src/pages/category-manage/index.vue

@@ -111,6 +111,7 @@
 
 <script setup lang="ts">
 import { ref, computed, onMounted } from 'vue'
+import { onShow } from '@dcloudio/uni-app'
 import { useCategoryStore, type Category } from '@/stores/category'
 import { waitForReady } from '@/utils/app-ready'
 import { getCategoryTransactionCount } from '@/api/category'
@@ -144,9 +145,17 @@ const migrateTargets = computed(() => {
   return currentCategories.value.filter(c => c.id !== deletingCat.value?.id)
 })
 
+const initialLoaded = ref(false)
+
 onMounted(async () => {
   await waitForReady()
-  catStore.fetchCategories()
+  await catStore.fetchCategories()
+  initialLoaded.value = true
+})
+
+// 返回页面时静默刷新
+onShow(() => {
+  if (initialLoaded.value) catStore.fetchCategories()
 })
 
 function goBack() {

client/src/pages/group-manage/index.vue

@@ -76,6 +76,7 @@
 
 <script setup lang="ts">
 import { ref, onMounted } from 'vue'
+import { onShow } from '@dcloudio/uni-app'
 import { useGroupStore } from '@/stores/group'
 import { waitForReady } from '@/utils/app-ready'
 import { statusBarHeight, capsuleRight } from '@/utils/system'
@@ -86,10 +87,17 @@ const groupStore = useGroupStore()
 const newGroupName = ref('')
 const inviteCode = ref('')
 const saving = ref(false)
+const initialLoaded = ref(false)
 
 onMounted(async () => {
   await waitForReady()
-  groupStore.fetchGroups()
+  await groupStore.fetchGroups()
+  initialLoaded.value = true
+})
+
+// 返回页面时静默刷新
+onShow(() => {
+  if (initialLoaded.value) groupStore.fetchGroups()
 })
 
 function goBack() {

client/src/pages/profile/index.vue

@@ -118,6 +118,7 @@
 
 <script setup lang="ts">
 import { ref, computed, onMounted } from 'vue'
+import { onShow } from '@dcloudio/uni-app'
 import { useTransactionStore } from '@/stores/transaction'
 import { useStatsStore } from '@/stores/stats'
 import { useBudgetStore } from '@/stores/budget'
@@ -140,6 +141,7 @@ const budget = computed(() => budgetStore.budget)
 const loading = ref(true)
 const showAbout = ref(false)
 const showIdentity = ref(false)
+const initialLoaded = ref(false)
 
 onMounted(async () => {
   await waitForReady()
@@ -156,9 +158,23 @@ onMounted(async () => {
     console.error('Profile load error:', e)
   } finally {
     loading.value = false
+    initialLoaded.value = true
   }
 })
 
+// 返回页面时静默刷新
+onShow(async () => {
+  if (!initialLoaded.value) return
+  try {
+    await Promise.all([
+      statsStore.fetchOverview(),
+      budgetStore.fetchBudget(),
+      txStore.fetchTransactions({ page: 1, pageSize: 1 }),
+      groupStore.fetchGroups()
+    ])
+  } catch {}
+})
+
 function goBudget() {
   uni.navigateTo({ url: '/pages/budget/index' })
 }