diff --git a/client/src/components/ColorPicker/ColorPicker.vue b/client/src/components/ColorPicker/ColorPicker.vue
new file mode 100644
index 0000000..386e7ab
--- /dev/null
+++ b/client/src/components/ColorPicker/ColorPicker.vue
@@ -0,0 +1,47 @@
+<template>
+  <view class="color-picker">
+    <view
+      v-for="c in colors" :key="c"
+      class="color-dot"
+      :class="{ selected: modelValue === c }"
+      :style="{ background: c }"
+      @tap="$emit('update:modelValue', c)"
+    />
+  </view>
+</template>
+
+<script setup lang="ts">
+const props = withDefaults(defineProps<{
+  modelValue: string
+  colors?: string[]
+}>(), {
+  colors: () => ['#FF8C69', '#7BC67E', '#5B9BD5', '#FFD700', '#FF69B4', '#8B5CF6', '#F97316', '#06B6D4']
+})
+
+defineEmits<{
+  'update:modelValue': [color: string]
+}>()
+</script>
+
+<style lang="scss" scoped>
+.color-picker {
+  display: flex;
+  gap: $space-lg;
+  margin-bottom: $space-md;
+  flex-wrap: wrap;
+}
+
+.color-dot {
+  width: 56rpx;
+  height: 56rpx;
+  border-radius: 50%;
+  border: 4rpx solid transparent;
+  transition: all $transition-normal;
+
+  &.selected {
+    border-color: $text;
+    transform: scale(1.15);
+  }
+  &:active { opacity: 0.7; }
+}
+</style>
diff --git a/client/src/components/EditModal/EditModal.vue b/client/src/components/EditModal/EditModal.vue
new file mode 100644
index 0000000..ea28d47
--- /dev/null
+++ b/client/src/components/EditModal/EditModal.vue
@@ -0,0 +1,146 @@
+<template>
+  <view class="modal-mask" v-if="visible" @tap="$emit('update:visible', false)">
+    <view class="modal" @tap.stop>
+      <text class="modal-title">{{ title }}</text>
+      <template v-for="field in fields" :key="field.key">
+        <input
+          v-if="field.type === 'text'"
+          class="modal-input"
+          :value="form[field.key]"
+          :placeholder="field.placeholder || field.label"
+          :maxlength="field.maxlength || 50"
+          @input="form[field.key] = ($event as any).detail.value"
+        />
+        <ColorPicker
+          v-if="field.type === 'color'"
+          :modelValue="form[field.key] || colors[0]"
+          @update:modelValue="form[field.key] = $event"
+          :colors="colors"
+        />
+      </template>
+      <view class="modal-btns">
+        <view class="modal-btn cancel" @tap="$emit('update:visible', false)">取消</view>
+        <view class="modal-btn confirm" :class="{ disabled: !canConfirm }" @tap="onConfirm">确定</view>
+      </view>
+    </view>
+  </view>
+</template>
+
+<script setup lang="ts">
+import { reactive, computed, watch } from 'vue'
+import ColorPicker from '@/components/ColorPicker/ColorPicker.vue'
+
+export interface EditField {
+  key: string
+  label: string
+  type: 'text' | 'color'
+  placeholder?: string
+  maxlength?: number
+}
+
+const props = withDefaults(defineProps<{
+  visible: boolean
+  title: string
+  fields: EditField[]
+  modelValue: Record<string, any>
+  colors?: string[]
+}>(), {
+  colors: () => ['#FF8C69', '#7BC67E', '#5B9BD5', '#FFD700', '#FF69B4', '#8B5CF6', '#F97316', '#06B6D4']
+})
+
+const emit = defineEmits<{
+  'update:visible': [val: boolean]
+  'confirm': [data: Record<string, any>]
+}>()
+
+const form = reactive<Record<string, any>>({})
+
+// 当 visible 变为 true 时，用 modelValue 初始化 form
+watch(() => props.visible, (val) => {
+  if (val) {
+    Object.keys(form).forEach(k => delete form[k])
+    Object.assign(form, { ...props.modelValue })
+  }
+})
+
+const canConfirm = computed(() => {
+  // 至少有一个 text 字段不为空
+  return props.fields
+    .filter(f => f.type === 'text')
+    .every(f => (form[f.key] || '').toString().trim().length > 0)
+})
+
+function onConfirm() {
+  if (!canConfirm.value) return
+  // 只返回 fields 中定义的字段
+  const data: Record<string, any> = {}
+  props.fields.forEach(f => { data[f.key] = form[f.key] || '' })
+  emit('confirm', data)
+}
+</script>
+
+<style lang="scss" scoped>
+.modal-mask {
+  position: fixed;
+  top: 0; left: 0; right: 0; bottom: 0;
+  background: rgba(0, 0, 0, 0.5);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  z-index: 200;
+}
+
+.modal {
+  width: 600rpx;
+  background: $surface;
+  border-radius: $space-lg;
+  padding: $space-2xl;
+}
+
+.modal-title {
+  font-size: $font-xl;
+  font-weight: 600;
+  color: $text;
+  display: block;
+  text-align: center;
+  margin-bottom: $space-lg;
+}
+
+.modal-input {
+  height: 96rpx;
+  background: $bg;
+  border-radius: $space-md;
+  padding: 0 $space-lg;
+  font-size: $font-lg;
+  margin-bottom: $space-md;
+}
+
+.modal-btns {
+  display: flex;
+  gap: $space-md;
+}
+
+.modal-btn {
+  flex: 1;
+  height: 88rpx;
+  border-radius: $space-md;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-size: $font-lg;
+  font-weight: 600;
+
+  &.cancel {
+    background: $bg;
+    color: $text-sec;
+  }
+
+  &.confirm {
+    background: linear-gradient(135deg, $primary, #E67355);
+    color: $surface;
+  }
+
+  &.disabled { opacity: 0.5; }
+  &:active { opacity: 0.8; }
+}
+</style>
diff --git a/client/src/components/TransactionItem/TransactionItem.vue b/client/src/components/TransactionItem/TransactionItem.vue
index a9e8c54..9d317b5 100644
--- a/client/src/components/TransactionItem/TransactionItem.vue
+++ b/client/src/components/TransactionItem/TransactionItem.vue
@@ -37,7 +37,7 @@
 <script setup lang="ts">
 import { ref, computed } from 'vue'
 import { formatAmount, formatDate } from '@/utils/format'
-import { API_BASE } from '@/config'
+import { getAvatarUrl } from '@/utils/avatar'
 import Icon from '@/components/Icon/Icon.vue'
 import CategoryIcon from '@/components/CategoryIcon/CategoryIcon.vue'
 
@@ -74,11 +74,7 @@ const isOtherCreator = computed(() => {
 defineEmits(['item-tap', 'delete'])
 
 const creatorAvatarUrl = computed(() => {
-  if (!props.item.creator_avatar) return ''
-  if (props.item.creator_avatar.startsWith('http') || props.item.creator_avatar.startsWith('blob:')) return props.item.creator_avatar
-  // 截取服务端根地址（去掉 /api）
-  const base = API_BASE.replace(/\/api$/, '')
-  return base + '/api/user/avatar/' + props.item.creator_avatar
+  return getAvatarUrl(props.item.creator_avatar || '')
 })
 
 const startX = ref(0)
diff --git a/client/src/pages/admin/feedback.vue b/client/src/pages/admin/feedback.vue
index be1d49d..358f791 100644
--- a/client/src/pages/admin/feedback.vue
+++ b/client/src/pages/admin/feedback.vue
@@ -120,7 +120,7 @@ import { waitForReady } from '@/utils/app-ready'
 import { statusBarHeight } from '@/utils/system'
 import { getFeedbackList, updateFeedbackStatus } from '@/api/feedback'
 import type { Feedback } from '@/api/feedback'
-import { API_BASE } from '@/config'
+import { getAvatarUrl } from '@/utils/avatar'
 import Icon from '@/components/Icon/Icon.vue'
 
 const typeMap: Record<string, string> = {
@@ -245,12 +245,6 @@ function copyContact(contact: string) {
   })
 }
 
-function getAvatarUrl(avatarUrl: string): string {
-  if (!avatarUrl) return ''
-  if (avatarUrl.startsWith('http') || avatarUrl.startsWith('blob:')) return avatarUrl
-  return `${API_BASE}/user/avatar/${avatarUrl}`
-}
-
 function formatTime(dateStr: string): string {
   const d = new Date(dateStr)
   const now = new Date()
diff --git a/client/src/pages/admin/users.vue b/client/src/pages/admin/users.vue
index d1bbccd..c0e1b96 100644
--- a/client/src/pages/admin/users.vue
+++ b/client/src/pages/admin/users.vue
@@ -57,7 +57,7 @@ import { ref, onMounted } from 'vue'
 import { onShow, onReachBottom, onPullDownRefresh } from '@dcloudio/uni-app'
 import { waitForReady } from '@/utils/app-ready'
 import { statusBarHeight } from '@/utils/system'
-import { API_BASE } from '@/config'
+import { getAvatarUrl } from '@/utils/avatar'
 import { getUsers, updateUserRole, deleteUser } from '@/api/admin'
 import { useUserStore } from '@/stores/user'
 import Icon from '@/components/Icon/Icon.vue'
@@ -112,12 +112,6 @@ async function loadUsers(reset = false) {
   }
 }
 
-function getAvatarUrl(avatarUrl: string): string {
-  if (!avatarUrl) return ''
-  if (avatarUrl.startsWith('http') || avatarUrl.startsWith('blob:')) return avatarUrl
-  return `${API_BASE}/user/avatar/${avatarUrl}`
-}
-
 function formatDate(dateStr: string) {
   const d = new Date(dateStr)
   return `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}-${String(d.getDate()).padStart(2, '0')}`
diff --git a/client/src/pages/backup-manage/index.vue b/client/src/pages/backup-manage/index.vue
index f0d14e5..f225c9b 100644
--- a/client/src/pages/backup-manage/index.vue
+++ b/client/src/pages/backup-manage/index.vue
@@ -60,6 +60,7 @@ import type { Backup } from '@/api/backup'
 import { waitForReady } from '@/utils/app-ready'
 import { statusBarHeight } from '@/utils/system'
 import Icon from '@/components/Icon/Icon.vue'
+import { API_BASE } from '@/config'
 
 const backups = ref<Backup[]>([])
 const loading = ref(true)
@@ -121,7 +122,7 @@ function onDownload(item: Backup) {
 
   // #ifdef MP-WEIXIN
   uni.downloadFile({
-    url: `https://xiaocai.j35.site/api/backup/${item.id}/download?token=${encodeURIComponent(item.downloadToken)}`,
+    url: `${API_BASE}/backup/${item.id}/download?token=${encodeURIComponent(item.downloadToken)}`,
     success: (res) => {
       if (res.statusCode === 200) {
         uni.openDocument({
diff --git a/client/src/pages/category-manage/index.vue b/client/src/pages/category-manage/index.vue
index 065475a..b863c2f 100644
--- a/client/src/pages/category-manage/index.vue
+++ b/client/src/pages/category-manage/index.vue
@@ -45,46 +45,22 @@
     </view>
 
     <!-- 添加弹窗 -->
-    <view class="modal-mask" v-if="showAddModal" @tap="showAddModal = false">
-      <view class="modal" @tap.stop>
-        <text class="modal-title">添加自定义分类</text>
-        <input class="modal-input" v-model="newName" placeholder="分类名称" maxlength="10" />
-        <view class="color-picker">
-          <view
-            v-for="c in colorOptions" :key="c"
-            class="color-dot"
-            :class="{ selected: selectedColor === c }"
-            :style="{ background: c }"
-            @tap="selectedColor = c"
-          />
-        </view>
-        <view class="modal-btns">
-          <view class="modal-btn cancel" @tap="showAddModal = false">取消</view>
-          <view class="modal-btn confirm" :class="{ disabled: !newName.trim() }" @tap="onAdd">添加</view>
-        </view>
-      </view>
-    </view>
+    <EditModal
+      v-model:visible="showAddModal"
+      title="添加自定义分类"
+      :fields="catFields"
+      :modelValue="addModel"
+      @confirm="onAdd"
+    />
 
     <!-- 编辑弹窗 -->
-    <view class="modal-mask" v-if="showEditModal" @tap="showEditModal = false">
-      <view class="modal" @tap.stop>
-        <text class="modal-title">编辑分类</text>
-        <input class="modal-input" v-model="editName" placeholder="分类名称" maxlength="10" />
-        <view class="color-picker">
-          <view
-            v-for="c in colorOptions" :key="c"
-            class="color-dot"
-            :class="{ selected: editColor === c }"
-            :style="{ background: c }"
-            @tap="editColor = c"
-          />
-        </view>
-        <view class="modal-btns">
-          <view class="modal-btn cancel" @tap="showEditModal = false">取消</view>
-          <view class="modal-btn confirm" @tap="onEditConfirm">确定</view>
-        </view>
-      </view>
-    </view>
+    <EditModal
+      v-model:visible="showEditModal"
+      title="编辑分类"
+      :fields="catFields"
+      :modelValue="editModel"
+      @confirm="onEditConfirm"
+    />
 
     <!-- 迁移弹窗 -->
     <view class="modal-mask" v-if="showMigrateModal" @tap="showMigrateModal = false">
@@ -120,14 +96,23 @@ import { waitForReady } from '@/utils/app-ready'
 import { getCategoryTransactionCount } from '@/api/category'
 import CategoryIcon from '@/components/CategoryIcon/CategoryIcon.vue'
 import Icon from '@/components/Icon/Icon.vue'
+import EditModal from '@/components/EditModal/EditModal.vue'
+import type { EditField } from '@/components/EditModal/EditModal.vue'
 import { statusBarHeight, capsuleRight } from '@/utils/system'
 
 const catStore = useCategoryStore()
 const tabType = ref<'expense' | 'income'>('expense')
 const showAddModal = ref(false)
-const newName = ref('')
-const colorOptions = ['#FF8C69', '#7BC67E', '#5B9BD5', '#FFD700', '#FF69B4', '#8B5CF6', '#F97316', '#06B6D4']
-const selectedColor = ref(colorOptions[0])
+const showEditModal = ref(false)
+
+/** 分类添加/编辑弹窗字段配置 */
+const catFields: EditField[] = [
+  { key: 'name', label: '分类名称', type: 'text', placeholder: '分类名称', maxlength: 10 },
+  { key: 'color', label: '颜色', type: 'color' },
+]
+
+const addModel = ref({ name: '', color: '#FF8C69' })
+const editModel = ref({ name: '', color: '#FF8C69' })
 
 // 拖拽排序相关
 let dragStartY = 0
@@ -135,10 +120,7 @@ let dragCurrentIndex = -1
 let dragItemEl: any = null
 
 // 编辑相关
-const showEditModal = ref(false)
 const editingCat = ref<Category | null>(null)
-const editName = ref('')
-const editColor = ref('')
 
 // 迁移相关
 const showMigrateModal = ref(false)
@@ -175,18 +157,18 @@ function goBack() {
   uni.navigateBack()
 }
 
-async function onAdd() {
-  const name = newName.value.trim()
+async function onAdd(data: Record<string, any>) {
+  const name = (data.name || '').toString().trim()
   if (!name) return
 
   try {
     await catStore.addCategory({
       name,
       icon: name[0],
-      color: selectedColor.value,
+      color: data.color,
       type: tabType.value
     })
-    newName.value = ''
+    addModel.value = { name: '', color: '#FF8C69' }
     showAddModal.value = false
     uni.showToast({ title: '添加成功', icon: 'success' })
   } catch {
@@ -196,21 +178,20 @@ async function onAdd() {
 
 function onEdit(cat: Category) {
   editingCat.value = cat
-  editName.value = cat.name
-  editColor.value = cat.color
+  editModel.value = { name: cat.name, color: cat.color }
   showEditModal.value = true
 }
 
-async function onEditConfirm() {
+async function onEditConfirm(data: Record<string, any>) {
   if (!editingCat.value) return
-  const name = editName.value.trim()
+  const name = (data.name || '').toString().trim()
   if (!name) {
     uni.showToast({ title: '请输入名称', icon: 'none' })
     return
   }
 
   try {
-    await catStore.updateCategory(editingCat.value.id, { name, color: editColor.value })
+    await catStore.updateCategory(editingCat.value.id, { name, color: data.color })
     showEditModal.value = false
     uni.showToast({ title: '修改成功', icon: 'success' })
   } catch {
@@ -454,27 +435,7 @@ function onDragEnd(e: any) {
   &:active { transform: scale(0.95); }
 }
 
-.color-picker {
-  display: flex;
-  gap: $space-lg;
-  margin-bottom: $space-md;
-  flex-wrap: wrap;
-}
-
-.color-dot {
-  width: 56rpx;
-  height: 56rpx;
-  border-radius: 50%;
-  border: 4rpx solid transparent;
-  transition: all $transition-normal;
-
-  &.selected {
-    border-color: $text;
-    transform: scale(1.15);
-  }
-  &:active { opacity: 0.7; }
-}
-
+/* 迁移弹窗样式 */
 .modal-mask {
   position: fixed;
   top: 0; left: 0; right: 0; bottom: 0;
@@ -508,15 +469,6 @@ function onDragEnd(e: any) {
   margin-bottom: $space-md;
 }
 
-.modal-input {
-  height: 96rpx;
-  background: $bg;
-  border-radius: $space-md;
-  padding: 0 $space-lg;
-  font-size: $font-lg;
-  margin-bottom: $space-md;
-}
-
 .migrate-list {
   max-height: 400rpx;
   margin-bottom: $space-md;
diff --git a/client/src/pages/group-manage/index.vue b/client/src/pages/group-manage/index.vue
index b306b64..ba108c3 100644
--- a/client/src/pages/group-manage/index.vue
+++ b/client/src/pages/group-manage/index.vue
@@ -154,7 +154,7 @@ import { useGroupStore } from '@/stores/group'
 import { useConfigStore } from '@/stores/config'
 import { waitForReady } from '@/utils/app-ready'
 import { statusBarHeight, capsuleRight } from '@/utils/system'
-import { API_BASE } from '@/config'
+import { getAvatarUrl } from '@/utils/avatar'
 import Icon from '@/components/Icon/Icon.vue'
 import Skeleton from '@/components/Skeleton/Skeleton.vue'
 import type { GroupMember, Group } from '@/api/group'
@@ -220,13 +220,6 @@ function copyInviteCode(code: string) {
   })
 }
 
-/** 获取头像 URL */
-function getAvatarUrl(avatarUrl: string): string {
-  if (!avatarUrl) return ''
-  if (avatarUrl.startsWith('http') || avatarUrl.startsWith('blob:')) return avatarUrl
-  return `${API_BASE}/user/avatar/${avatarUrl}`
-}
-
 async function handleCreate() {
   if (saving.value) return
   const name = newGroupName.value.trim()
diff --git a/client/src/pages/tag-manage/index.vue b/client/src/pages/tag-manage/index.vue
index 551efaf..9dbe690 100644
--- a/client/src/pages/tag-manage/index.vue
+++ b/client/src/pages/tag-manage/index.vue
@@ -39,46 +39,22 @@
     </view>
 
     <!-- 添加弹窗 -->
-    <view class="modal-mask" v-if="showAddModal" @tap="showAddModal = false">
-      <view class="modal" @tap.stop>
-        <text class="modal-title">添加标签</text>
-        <input class="modal-input" v-model="newName" placeholder="标签名称" maxlength="20" />
-        <view class="color-picker">
-          <view
-            v-for="c in colorOptions" :key="c"
-            class="color-dot"
-            :class="{ selected: selectedColor === c }"
-            :style="{ background: c }"
-            @tap="selectedColor = c"
-          />
-        </view>
-        <view class="modal-btns">
-          <view class="modal-btn cancel" @tap="showAddModal = false">取消</view>
-          <view class="modal-btn confirm" :class="{ disabled: !newName.trim() }" @tap="onAdd">添加</view>
-        </view>
-      </view>
-    </view>
+    <EditModal
+      v-model:visible="showAddModal"
+      title="添加标签"
+      :fields="addFields"
+      :modelValue="addModel"
+      @confirm="onAdd"
+    />
 
     <!-- 编辑弹窗 -->
-    <view class="modal-mask" v-if="showEditModal" @tap="showEditModal = false">
-      <view class="modal" @tap.stop>
-        <text class="modal-title">编辑标签</text>
-        <input class="modal-input" v-model="editName" placeholder="标签名称" maxlength="20" />
-        <view class="color-picker">
-          <view
-            v-for="c in colorOptions" :key="c"
-            class="color-dot"
-            :class="{ selected: editColor === c }"
-            :style="{ background: c }"
-            @tap="editColor = c"
-          />
-        </view>
-        <view class="modal-btns">
-          <view class="modal-btn cancel" @tap="showEditModal = false">取消</view>
-          <view class="modal-btn confirm" @tap="onEditConfirm">确定</view>
-        </view>
-      </view>
-    </view>
+    <EditModal
+      v-model:visible="showEditModal"
+      title="编辑标签"
+      :fields="editFields"
+      :modelValue="editModel"
+      @confirm="onEditConfirm"
+    />
   </view>
 </template>
 
@@ -90,18 +66,24 @@ import type { Tag } from '@/api/tag'
 import { waitForReady } from '@/utils/app-ready'
 import { statusBarHeight } from '@/utils/system'
 import Icon from '@/components/Icon/Icon.vue'
+import EditModal from '@/components/EditModal/EditModal.vue'
+import type { EditField } from '@/components/EditModal/EditModal.vue'
 
 const tagStore = useTagStore()
 
 const showAddModal = ref(false)
-const newName = ref('')
-const colorOptions = ['#FF8C69', '#7BC67E', '#5B9BD5', '#FFD700', '#FF69B4', '#8B5CF6', '#F97316', '#06B6D4']
-const selectedColor = ref(colorOptions[0])
-
 const showEditModal = ref(false)
 const editingTag = ref<Tag | null>(null)
-const editName = ref('')
-const editColor = ref('')
+
+/** 添加/编辑弹窗字段配置 */
+const addFields: EditField[] = [
+  { key: 'name', label: '标签名称', type: 'text', placeholder: '标签名称', maxlength: 20 },
+  { key: 'color', label: '颜色', type: 'color' },
+]
+const editFields: EditField[] = addFields
+
+const addModel = ref({ name: '', color: '#FF8C69' })
+const editModel = ref({ name: '', color: '#FF8C69' })
 
 const initialLoaded = ref(false)
 
@@ -124,13 +106,13 @@ function goBack() {
   uni.navigateBack()
 }
 
-async function onAdd() {
-  const name = newName.value.trim()
+async function onAdd(data: Record<string, any>) {
+  const name = (data.name || '').toString().trim()
   if (!name) return
 
   try {
-    await tagStore.addTag({ name, color: selectedColor.value })
-    newName.value = ''
+    await tagStore.addTag({ name, color: data.color })
+    addModel.value = { name: '', color: '#FF8C69' }
     showAddModal.value = false
     uni.showToast({ title: '添加成功', icon: 'success' })
   } catch {
@@ -140,21 +122,20 @@ async function onAdd() {
 
 function onEdit(tag: Tag) {
   editingTag.value = tag
-  editName.value = tag.name
-  editColor.value = tag.color
+  editModel.value = { name: tag.name, color: tag.color }
   showEditModal.value = true
 }
 
-async function onEditConfirm() {
+async function onEditConfirm(data: Record<string, any>) {
   if (!editingTag.value) return
-  const name = editName.value.trim()
+  const name = (data.name || '').toString().trim()
   if (!name) {
     uni.showToast({ title: '请输入名称', icon: 'none' })
     return
   }
 
   try {
-    await tagStore.updateTag(editingTag.value.id, { name, color: editColor.value })
+    await tagStore.updateTag(editingTag.value.id, { name, color: data.color })
     showEditModal.value = false
     uni.showToast({ title: '修改成功', icon: 'success' })
   } catch {
@@ -283,89 +264,4 @@ async function onDelete(tag: Tag) {
   z-index: 50;
   &:active { transform: scale(0.95); }
 }
-
-.modal-mask {
-  position: fixed;
-  top: 0; left: 0; right: 0; bottom: 0;
-  background: rgba(0, 0, 0, 0.5);
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  z-index: 200;
-}
-
-.modal {
-  width: 600rpx;
-  background: $surface;
-  border-radius: $space-lg;
-  padding: $space-2xl;
-}
-
-.modal-title {
-  font-size: $font-xl;
-  font-weight: 600;
-  color: $text;
-  display: block;
-  text-align: center;
-  margin-bottom: $space-lg;
-}
-
-.modal-input {
-  height: 96rpx;
-  background: $bg;
-  border-radius: $space-md;
-  padding: 0 $space-lg;
-  font-size: $font-lg;
-  margin-bottom: $space-md;
-}
-
-.color-picker {
-  display: flex;
-  gap: $space-lg;
-  margin-bottom: $space-md;
-  flex-wrap: wrap;
-}
-
-.color-dot {
-  width: 56rpx;
-  height: 56rpx;
-  border-radius: 50%;
-  border: 4rpx solid transparent;
-  transition: all $transition-normal;
-
-  &.selected {
-    border-color: $text;
-    transform: scale(1.15);
-  }
-  &:active { opacity: 0.7; }
-}
-
-.modal-btns {
-  display: flex;
-  gap: $space-md;
-}
-
-.modal-btn {
-  flex: 1;
-  height: 88rpx;
-  border-radius: $space-md;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  font-size: $font-lg;
-  font-weight: 600;
-
-  &.cancel {
-    background: $bg;
-    color: $text-sec;
-  }
-
-  &.confirm {
-    background: linear-gradient(135deg, $primary, #E67355);
-    color: $surface;
-  }
-
-  &.disabled { opacity: 0.5; }
-  &:active { opacity: 0.8; }
-}
 </style>
diff --git a/client/src/stores/user.ts b/client/src/stores/user.ts
index 2cc4224..b368ae0 100644
--- a/client/src/stores/user.ts
+++ b/client/src/stores/user.ts
@@ -1,7 +1,7 @@
 import { defineStore } from 'pinia'
 import { ref, computed } from 'vue'
 import * as api from '@/api/user'
-import { API_BASE } from '@/config'
+import { getAvatarUrl } from '@/utils/avatar'
 
 export const useUserStore = defineStore('user', () => {
   const userInfo = ref<api.UserInfo | null>(null)
@@ -16,11 +16,7 @@ export const useUserStore = defineStore('user', () => {
 
   const avatarUrl = computed(() => {
     const filename = userInfo.value?.avatar_url || uni.getStorageSync('xc:avatar_url') || ''
-    if (!filename) return ''
-    // 已是完整 URL（http/blob）直接返回
-    if (filename.startsWith('http') || filename.startsWith('blob:')) return filename
-    // 拼接：API_BASE + /user/avatar/ + 文件名
-    return `${API_BASE}/user/avatar/${filename}`
+    return getAvatarUrl(filename)
   })
 
   async function fetchUserInfo() {
diff --git a/client/src/utils/avatar.ts b/client/src/utils/avatar.ts
new file mode 100644
index 0000000..c6c80fd
--- /dev/null
+++ b/client/src/utils/avatar.ts
@@ -0,0 +1,8 @@
+import { API_BASE } from '@/config'
+
+/** 将头像文件名转为完整 URL */
+export function getAvatarUrl(filename: string): string {
+  if (!filename) return ''
+  if (filename.startsWith('http') || filename.startsWith('blob:')) return filename
+  return `${API_BASE}/user/avatar/${filename}`
+}
diff --git a/client/src/utils/format.ts b/client/src/utils/format.ts
index c3e1a6e..00a7f68 100644
--- a/client/src/utils/format.ts
+++ b/client/src/utils/format.ts
@@ -48,7 +48,7 @@ export function formatMonth(date: string): string {
   return `${year}年${parseInt(month)}月`
 }
 
-/** 获取当前月份（UTC+8 时区，与服务端保持一致） */
+/** 获取当前月份（UTC+8 时区，与服务端 date.ts 逻辑一致） */
 export function getCurrentMonth(): string {
   const d = new Date()
   const offset = 8 * 60 * 60 * 1000
diff --git a/server/src/db/connection.ts b/server/src/db/connection.ts
index 86c0489..833efb0 100644
--- a/server/src/db/connection.ts
+++ b/server/src/db/connection.ts
@@ -22,4 +22,9 @@ const pool = mysql.createPool({
   console.error('[DB] Pool error:', err?.message || err)
 })
 
+/** 获取单个连接（用于事务） */
+export async function getConnection() {
+  return pool.getConnection()
+}
+
 export default pool
diff --git a/server/src/routes/notification.ts b/server/src/routes/notification.ts
index 29e2410..bc48e81 100644
--- a/server/src/routes/notification.ts
+++ b/server/src/routes/notification.ts
@@ -1,48 +1,13 @@
 import { Router, Response, NextFunction } from 'express'
-import multer from 'multer'
-import path from 'path'
-import fs from 'fs'
 import pool from '../db/connection'
 import { AuthRequest } from '../middleware/auth'
 import { requireAdmin } from '../middleware/requireAdmin'
+import { createUploadConfig } from '../utils/upload'
 
 const router = Router()
 
-// 通知图片上传配置
-const UPLOAD_DIR = process.env.UPLOAD_DIR || './uploads'
-const NOTIFICATION_DIR = path.resolve(UPLOAD_DIR, 'notifications')
-if (!fs.existsSync(NOTIFICATION_DIR)) {
-  fs.mkdirSync(NOTIFICATION_DIR, { recursive: true })
-}
-
-const storage = multer.diskStorage({
-  destination: (_req, _file, cb) => {
-    if (!fs.existsSync(NOTIFICATION_DIR)) {
-      fs.mkdirSync(NOTIFICATION_DIR, { recursive: true })
-    }
-    cb(null, NOTIFICATION_DIR)
-  },
-  filename: (req: AuthRequest, file, cb) => {
-    const extMap: Record<string, string> = {
-      'image/jpeg': '.jpg', 'image/png': '.png', 'image/webp': '.webp'
-    }
-    const ext = extMap[file.mimetype] || '.jpg'
-    cb(null, `notif_${req.userId}_${Date.now()}${ext}`)
-  }
-})
-
-const upload = multer({
-  storage,
-  limits: { fileSize: 5 * 1024 * 1024 }, // 最大 5MB
-  fileFilter: (_req, file, cb) => {
-    const allowed = ['image/jpeg', 'image/png', 'image/webp']
-    if (allowed.includes(file.mimetype)) {
-      cb(null, true)
-    } else {
-      cb(new Error('仅支持 JPEG、PNG、WebP 格式'))
-    }
-  }
-})
+// 通知图片上传配置（5MB）
+const upload = createUploadConfig('notifications', 5 * 1024 * 1024)
 
 /** 公告编辑权限检查（管理员可编辑所有公告，群主可编辑自己群组的公告） */
 async function requireNotificationEditAuth(req: AuthRequest, res: Response, next: NextFunction) {
diff --git a/server/src/routes/recurring.ts b/server/src/routes/recurring.ts
index 562574c..d107e83 100644
--- a/server/src/routes/recurring.ts
+++ b/server/src/routes/recurring.ts
@@ -127,12 +127,16 @@ router.delete('/:id', async (req, res) => {
   }
 })
 
-/** 同步：检查所有活跃模板，生成到期交易 */
+/** 同步：检查所有活跃模板，生成到期交易（事务包裹） */
 router.post('/sync', async (req, res) => {
+  const conn = await pool.getConnection()
   try {
     const userId = (req as any).userId
+
+    await conn.beginTransaction()
+
     // 获取该用户所有活跃且到期（next_date <= 今天）的模板
-    const [templates] = await pool.execute(
+    const [templates] = await conn.execute(
       `SELECT * FROM recurring_templates
        WHERE user_id = ? AND is_active = 1 AND next_date <= CURDATE()
        ORDER BY next_date ASC`,
@@ -141,7 +145,6 @@ router.post('/sync', async (req, res) => {
 
     let generated = 0
     const today = new Date()
-    const todayStr = today.toISOString().slice(0, 10)
 
     for (const t of templates as any[]) {
       let next = new Date(t.next_date)
@@ -152,13 +155,13 @@ router.post('/sync', async (req, res) => {
         if (end && next > end) break
 
         // 检查是否已生成过（避免重复）
-        const [existing] = await pool.execute(
+        const [existing] = await conn.execute(
           `SELECT id FROM transactions
            WHERE user_id = ? AND recurring_id = ? AND date = ?`,
           [userId, t.id, next.toISOString().slice(0, 10)]
         )
         if ((existing as any[]).length === 0) {
-          await pool.execute(
+          await conn.execute(
             `INSERT INTO transactions (user_id, amount, type, category_id, note, date, group_id, recurring_id)
              VALUES (?, ?, ?, ?, ?, ?, ?, ?)`,
             [userId, t.amount, t.type, t.category_id, t.note,
@@ -178,16 +181,20 @@ router.post('/sync', async (req, res) => {
       }
 
       // 更新 next_date：循环结束后 next 已推进到今天之后的下一周期，直接使用
-      await pool.execute(
+      await conn.execute(
         'UPDATE recurring_templates SET next_date = ? WHERE id = ?',
         [next.toISOString().slice(0, 10), t.id]
       )
     }
 
+    await conn.commit()
     res.json({ code: 0, data: { generated } })
   } catch (error) {
+    await conn.rollback()
     console.error('Sync recurring error:', error)
     res.status(500).json({ code: 50000, message: '同步失败' })
+  } finally {
+    conn.release()
   }
 })
 
diff --git a/server/src/routes/user.ts b/server/src/routes/user.ts
index 1e4f2c5..74fc411 100644
--- a/server/src/routes/user.ts
+++ b/server/src/routes/user.ts
@@ -1,48 +1,15 @@
 import { Router, Response } from 'express'
-import multer from 'multer'
 import path from 'path'
 import fs from 'fs'
 import pool from '../db/connection'
 import { AuthRequest } from '../middleware/auth'
+import { createUploadConfig } from '../utils/upload'
 
 const router = Router()
 
-// 头像上传配置
-const UPLOAD_DIR = process.env.UPLOAD_DIR || './uploads'
-const AVATAR_DIR = path.resolve(UPLOAD_DIR, 'avatars')
-if (!fs.existsSync(AVATAR_DIR)) {
-  fs.mkdirSync(AVATAR_DIR, { recursive: true })
-}
-
-const storage = multer.diskStorage({
-  destination: (_req, _file, cb) => {
-    // 确保目录存在（可能被手动删除）
-    if (!fs.existsSync(AVATAR_DIR)) {
-      fs.mkdirSync(AVATAR_DIR, { recursive: true })
-    }
-    cb(null, AVATAR_DIR)
-  },
-  filename: (req: AuthRequest, file, cb) => {
-    const extMap: Record<string, string> = {
-      'image/jpeg': '.jpg', 'image/png': '.png', 'image/webp': '.webp'
-    }
-    const ext = extMap[file.mimetype] || '.jpg'
-    cb(null, `${req.userId}_${Date.now()}${ext}`)
-  }
-})
-
-const upload = multer({
-  storage,
-  limits: { fileSize: 2 * 1024 * 1024 }, // 最大 2MB
-  fileFilter: (_req, file, cb) => {
-    const allowed = ['image/jpeg', 'image/png', 'image/webp']
-    if (allowed.includes(file.mimetype)) {
-      cb(null, true)
-    } else {
-      cb(new Error('仅支持 JPEG、PNG、WebP 格式'))
-    }
-  }
-})
+// 头像上传配置（2MB）
+const AVATAR_DIR = path.resolve(process.env.UPLOAD_DIR || './uploads', 'avatars')
+const upload = createUploadConfig('avatars', 2 * 1024 * 1024)
 
 /** 获取当前用户信息 */
 router.get('/me', async (req: AuthRequest, res: Response) => {
diff --git a/server/src/utils/upload.ts b/server/src/utils/upload.ts
new file mode 100644
index 0000000..7d15e65
--- /dev/null
+++ b/server/src/utils/upload.ts
@@ -0,0 +1,45 @@
+import multer from 'multer'
+import path from 'path'
+import crypto from 'crypto'
+import fs from 'fs'
+
+const UPLOAD_DIR = process.env.UPLOAD_DIR || './uploads'
+
+/** 创建指定子目录的 multer 配置 */
+export function createUploadConfig(subDir: string, maxFileSize = 5 * 1024 * 1024) {
+  const targetDir = path.resolve(UPLOAD_DIR, subDir)
+
+  // 确保目录存在
+  if (!fs.existsSync(targetDir)) {
+    fs.mkdirSync(targetDir, { recursive: true })
+  }
+
+  const storage = multer.diskStorage({
+    destination: (_req, _file, cb) => {
+      // 运行时再次确认（可能被手动删除）
+      if (!fs.existsSync(targetDir)) {
+        fs.mkdirSync(targetDir, { recursive: true })
+      }
+      cb(null, targetDir)
+    },
+    filename: (_req, file, cb) => {
+      const ext = path.extname(file.originalname).toLowerCase() || '.jpg'
+      const prefix = subDir === 'avatars' ? '' : 'notif_'
+      cb(null, `${prefix}${Date.now()}_${crypto.randomInt(1000, 9999)}${ext}`)
+    }
+  })
+
+  return multer({
+    storage,
+    limits: { fileSize: maxFileSize },
+    fileFilter: (_req, file, cb) => {
+      const allowed = ['.jpg', '.jpeg', '.png', '.webp']
+      const ext = path.extname(file.originalname).toLowerCase()
+      if (allowed.includes(ext)) {
+        cb(null, true)
+      } else {
+        cb(new Error('仅支持 JPEG、PNG、WebP 格式'))
+      }
+    }
+  })
+}