feat: 更新支付模块 (Stripe/PayPal/PingPong) 和 uni-app 配置

uni-app/src/pages/profile/profile.vue

@@ -9,6 +9,16 @@
       </view>
     </view>
 
+    <view class="credit-card" v-if="user.tier !== 'guest'" @click="goCredits">
+      <view class="credit-left">
+        <text class="credit-label">可用次数</text>
+        <text class="credit-value">{{ creditBalance }}</text>
+      </view>
+      <view class="credit-right">
+        <text class="credit-buy">购买次数 ›</text>
+      </view>
+    </view>
+
     <view class="section">
       <view class="section-title">账号设置</view>
       <view class="menu-item" v-if="user.tier !== 'guest'" @click="showProfileEdit = true">
@@ -21,9 +31,9 @@
         <text class="menu-text">修改密码</text>
         <text class="menu-arrow">›</text>
       </view>
-      <view class="menu-item" @click="goUpgrade">
+      <view class="menu-item" @click="goCredits">
         <text class="menu-icon">⭐</text>
-        <text class="menu-text">会员升级</text>
+        <text class="menu-text">购买次数</text>
         <text class="menu-arrow">›</text>
       </view>
     </view>
@@ -128,11 +138,12 @@
 <script setup>
 import { ref, computed, onMounted } from 'vue'
 import { onShow } from '@dcloudio/uni-app'
-import { authApi } from '@/utils/api.js'
+import { authApi, creditApi } from '@/utils/api.js'
 import AiAssistant from '@/components/ai-assistant.vue'
 import { STORAGE_KEYS, PAGES, TIER_LABELS } from '@/config.js'
 
 const user = ref({})
+const creditBalance = ref(0)
 const showProfileEdit = ref(false)
 const showPassword = ref(false)
 const editForm = ref({ username: '', email: '' })
@@ -158,6 +169,12 @@ const loadUser = async () => {
   } catch {
     user.value = { tier: 'guest' }
   }
+  try {
+    const cb = await creditApi.balance()
+    creditBalance.value = cb.balance || 0
+  } catch {
+    creditBalance.value = 0
+  }
 }
 
 const saveProfile = async () => {
@@ -195,7 +212,7 @@ const changePwd = async () => {
 }
 
 const goLogin = () => uni.navigateTo({ url: PAGES.LOGIN })
-const goUpgrade = () => uni.navigateTo({ url: PAGES.UPGRADE })
+const goCredits = () => uni.navigateTo({ url: PAGES.CREDITS })
 const goFeedback = () => uni.navigateTo({ url: PAGES.FEEDBACK })
 const goAgreement = (type) => uni.navigateTo({ url: `/pages/agreement/${type}` })
 const goCertification = () => uni.navigateTo({ url: PAGES.CERTIFICATION })
@@ -280,6 +297,21 @@ onShow(loadUser)
 .tier-badge.enterprise { background: #e3f2fd; color: #1565c0; }
 .tier-badge.guest { background: #fce4ec; color: #c62828; }
 
+.credit-card {
+  background: linear-gradient(135deg, #f97316, #ea580c);
+  border-radius: 16rpx;
+  padding: 28rpx 32rpx;
+  margin-bottom: 20rpx;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+}
+.credit-left { display: flex; flex-direction: column; }
+.credit-label { font-size: 24rpx; color: rgba(255,255,255,0.8); }
+.credit-value { font-size: 48rpx; color: #fff; font-weight: bold; }
+.credit-right { }
+.credit-buy { font-size: 28rpx; color: #fff; font-weight: 500; }
+
 .section {
   background: #fff;
   border-radius: 16rpx;