feat: 越南充值页加 USDT (TRC20) 通道切换

- recharge.vue: 银行卡 / USDT 两个 tab，共用 amount 输入
- api.js: 新增 epayDeposit 调 /epay_online_order

USDT 请求体多传 pay_type='usdt'，下单响应同 AlinPay 走 Data.url 跳转

pages/recharge.vue

@@ -184,11 +184,23 @@
           @confirm="confirmPicker"
         ></u-picker>
       </template>
-      <!-- 越南 AlinPay 在线充值 -->
+      <!-- 越南在线充值：银行卡 (AlinPay) / USDT (Epay) 双通道 -->
       <template v-if="userInfo.pay_channel == 'ALIN_VN'">
+        <view class="pay-tabs">
+          <view
+            class="pay-tab"
+            :class="{ active: payChannel === 'alin' }"
+            @click="payChannel = 'alin'"
+          >Thẻ ngân hàng</view>
+          <view
+            class="pay-tab"
+            :class="{ active: payChannel === 'epay' }"
+            @click="payChannel = 'epay'"
+          >USDT (TRC20)</view>
+        </view>
         <view class="picker-view">
           <u-input
-            placeholder="Tối thiểu 1,000,000"
+            :placeholder="payChannel === 'epay' ? 'Số tiền nạp' : 'Tối thiểu 1,000,000'"
             color="#93979b"
             v-model="amount"
             type="number"
@@ -207,12 +219,12 @@
             class="button"
             color="#e5b932"
             :text="$lang.submit"
-            @click="submitAlin"
+            @click="payChannel === 'epay' ? submitEpay() : submitAlin()"
           ></u-button>
         </view>
         <view class="list">
           <view class="tip">
-            {{ $lang.rechargeTip }}
+            {{ payChannel === 'epay' ? 'Thanh toán USDT qua mạng TRC20' : $lang.rechargeTip }}
           </view>
         </view>
       </template>
@@ -240,6 +252,8 @@ export default {
       amount: "",
       currency: { name: "", key: "" },
       coin_type: { name: "", key: "" },
+      // 越南地区在线支付通道：'alin'(银行卡) | 'epay'(USDT)
+      payChannel: "alin",
     };
   },
   computed: {
@@ -409,11 +423,77 @@ export default {
           this.$toastHide();
         });
     },
+    submitEpay() {
+      if (!this.amount || this.amount <= 0) {
+        this.$toast({ message: 'Vui lòng nhập số tiền', duration: 2000 });
+        return;
+      }
+      if (this.amount < 1000000) {
+        this.$toast({ message: 'Số tiền tối thiểu là 1,000,000', duration: 2000 });
+        return;
+      }
+      const params = {
+        user_id: this.userInfo.id,
+        price: this.amount,
+        client: 3,
+        username: this.userInfo.username,
+        pay_type: 'usdt',
+      };
+      this.$toast({
+        type: "loading",
+        message: `${this.$lang.submit}...`,
+        duration: 200000,
+      });
+      this.$api
+        .epayDeposit(params)
+        .then((res) => {
+          const d = res.Data || {};
+          if (d.status == 1 && d.url) {
+            const o = navigator.userAgent;
+            const isiOS = !!o.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/);
+            if (isiOS) {
+              window.location.href = d.url;
+            } else {
+              window.open(d.url, "_blank");
+            }
+          } else {
+            this.$toast({ message: d.message || 'Nạp thất bại', duration: 2000 });
+          }
+        })
+        .catch((err) => {
+          console.log(err);
+        })
+        .finally(() => {
+          this.$toastHide();
+        });
+    },
   },
 };
 </script>
 
 <style lang="scss" scoped>
+.pay-tabs {
+  display: flex;
+  padding: 20rpx 30rpx 0;
+  gap: 15rpx;
+}
+.pay-tab {
+  flex: 1;
+  text-align: center;
+  padding: 18rpx 0;
+  color: #93979b;
+  background: rgba(255, 255, 255, 0.04);
+  border: 1rpx solid #2a3448;
+  border-radius: 8rpx;
+  font-size: 26rpx;
+  transition: all 0.2s;
+  &.active {
+    background: linear-gradient(to right, #e5b932, #c5971e);
+    color: #0b1520;
+    font-weight: bold;
+    border-color: #e5b932;
+  }
+}
 .recharge {
   background: #0b1520;
   width: 100%;

request/api.js

@@ -57,6 +57,10 @@ let api = {
   alinDeposit: async (params) => {
     return await ajax.post("/alin_online_order", params);
   },
+  // 彩虹易支付充值（USDT TRC20 / 支付宝 / 微信 等，默认 usdt）
+  epayDeposit: async (params) => {
+    return await ajax.post("/epay_online_order", params);
+  },
   // 越南银行卡提现
   applyWithdrawBank: async (params) => {
     return await ajax.post("/apply_withdraw_bank", params);