fix: 提款页面币种选择优化

1. "Select Coin"改为i18n国际化
2. BTC/ETH使用真实curr_id(3/4)替代静态占位ID
3. 手续费显示统一使用后端返回的process字段

pages/index/withdraw.vue

@@ -44,7 +44,7 @@
 			<!-- 币种选择 -->
 			<view v-if="current==1" class="width-100b radiu-20 padding-w-32 padding-b-20 margin-t-24"
 				:style="'background-color: '+theme.fu_bg+';color: '+theme.text">
-				<view class="height-116 padding-t-27 font-28 weight-bold">Select Coin</view>
+				<view class="height-116 padding-t-27 font-28 weight-bold">{{i18n.withdraw.text1}}</view>
 				<view class="flex align-center flex-wrap">
 					<view @click="changeCoinType(item)" v-for="(item,index) in coinTypes" :key="item.id"
 						:class="currid==item.id?'onbox':'offbox'" class="numbold-font margin-r-14">{{item.name}}</view>
@@ -95,7 +95,7 @@
 				:style="'background-color: '+theme.fu_bg+';color: '+theme.text">
 				<text class="font-28 weight-bold">{{i18n.withdraw.text7}}</text>
 				<view v-if="current==1" class="flex align-center">
-					<text class="font-28 color-0165EE weight-bold">{{lian==0?data.erc_process:data.process}}</text>
+					<text class="font-28 color-0165EE weight-bold">{{data.process}}</text>
 					<text class="font-28 numbold-font margin-l-10">{{curr}}</text>
 				</view>
 				<view v-if="current==2" class="flex align-center">
@@ -409,13 +409,14 @@
 					if (res.code == 1) {
 						this.list = res.data
 						// 构建币种选择列表，确保包含 BTC 和 ETH
+						// BTC curr_id=3, ETH curr_id=4（与后端 app_currency 表对应）
 						let types = [...res.data]
 						let names = types.map(t => t.name.toUpperCase())
 						if (!names.includes('BTC')) {
-							types.push({ id: 'btc_static', name: 'BTC' })
+							types.push({ id: 3, name: 'BTC' })
 						}
 						if (!names.includes('ETH')) {
-							types.push({ id: 'eth_static', name: 'ETH' })
+							types.push({ id: 4, name: 'ETH' })
 						}
 						this.coinTypes = types
 						this.curr = res.data[0].name