feat: 新增小程序分享功能 — 全局默认+页面级定制

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

@@ -75,6 +75,11 @@
             <view class="invite-action" @tap="copyInviteCode(group.invite_code)">
               <text class="invite-action-text">复制</text>
             </view>
+            <!-- #ifdef MP-WEIXIN -->
+            <button class="invite-action share-btn" open-type="share" @tap="shareInviteCode = group.invite_code">
+              <text class="invite-action-text">分享</text>
+            </button>
+            <!-- #endif -->
             <view v-if="group.role === 'owner'" class="invite-action" @tap="handleRefreshCode(group)">
               <Icon name="refresh" :size="24" color="#8B7E7E" />
               <text class="invite-action-text">刷新</text>
@@ -135,7 +140,7 @@
 
 <script setup lang="ts">
 import { ref, onMounted } from 'vue'
-import { onShow } from '@dcloudio/uni-app'
+import { onShow, onShareAppMessage, onShareTimeline } from '@dcloudio/uni-app'
 import { useGroupStore } from '@/stores/group'
 import { waitForReady } from '@/utils/app-ready'
 import { statusBarHeight, capsuleRight } from '@/utils/system'
@@ -150,6 +155,7 @@ const newGroupName = ref('')
 const inviteCode = ref('')
 const saving = ref(false)
 const initialLoaded = ref(false)
+const shareInviteCode = ref('') // 当前要分享的邀请码
 
 // 成员管理弹窗
 const showMemberModal = ref(false)
@@ -168,6 +174,24 @@ onShow(() => {
   if (initialLoaded.value) groupStore.fetchGroups()
 })
 
+// #ifdef MP-WEIXIN
+onShareAppMessage(() => {
+  // 空值保护：通过右上角菜单触发时 invite_code 可能为空
+  const code = shareInviteCode.value
+  const path = code
+    ? `/pages/group-manage/index?invite_code=${code}`
+    : '/pages/group-manage/index'
+  return {
+    title: '一起来记账吧！',
+    path
+  }
+})
+
+onShareTimeline(() => ({
+  title: '小菜记账 — 一起来记账吧！'
+}))
+// #endif
+
 function goBack() {
   uni.navigateBack()
 }
@@ -555,6 +579,20 @@ function handleDissolve(group: Group) {
   color: $text-sec;
 }
 
+/* 分享按钮重置默认样式 */
+.share-btn {
+  margin: 0;
+  padding: 4rpx 12rpx;
+  line-height: normal;
+  background: $bg;
+  border: none;
+  border-radius: $radius-sm;
+  font-size: inherit;
+  color: inherit;
+
+  &::after { border: none; }
+}
+
 /* 操作按钮 */
 .group-actions {
   display: flex;

client/src/pages/stats/index.vue

@@ -120,7 +120,7 @@
 <script setup lang="ts">
 import { ref, computed, onMounted, watch } from 'vue'
 import { storeToRefs } from 'pinia'
-import { onShow, onPullDownRefresh } from '@dcloudio/uni-app'
+import { onShow, onPullDownRefresh, onShareAppMessage, onShareTimeline } from '@dcloudio/uni-app'
 import { useStatsStore } from '@/stores/stats'
 import { useGroupStore } from '@/stores/group'
 import { waitForReady } from '@/utils/app-ready'
@@ -312,6 +312,20 @@ onPullDownRefresh(() => {
   loadData().finally(() => uni.stopPullDownRefresh())
 })
 
+// #ifdef MP-WEIXIN
+onShareAppMessage(() => {
+  const expense = formatAmount(overview.value.expense)
+  return {
+    title: `我的${formatMonth(currentMonth.value)}账单：支出 ${expense}`,
+    path: '/pages/stats/index'
+  }
+})
+
+onShareTimeline(() => ({
+  title: `小菜记账 — 我的${formatMonth(currentMonth.value)}账单`
+}))
+// #endif
+
 function prevMonth() {
   const [y, m] = currentMonth.value.split('-').map(Number)
   currentMonth.value = m === 1 ? `${y - 1}-12` : `${y}-${String(m - 1).padStart(2, '0')}`