feat: 添加聊天页面和钱包卡组件，优化用户界面和余额格式化逻辑

src/views/user/components/wallet-card.vue

@@ -0,0 +1,27 @@
+<script lang='ts' setup>
+const balance = ref(9999999.00);
+
+const formattedBalance = formatBalance(balance);
+</script>
+
+<template>
+  <ion-card>
+    <ion-card-header>
+      <ion-card-title>{{ formattedBalance }}</ion-card-title>
+      <ion-card-subtitle>Wallet</ion-card-subtitle>
+    </ion-card-header>
+
+    <!-- <ion-card-content>
+      Here's a small text description for the card content. Nothing more, nothing less.
+    </ion-card-content> -->
+
+    <ion-button fill="clear">
+      Recharge
+    </ion-button>
+    <ion-button fill="clear">
+      Withdrawal
+    </ion-button>
+  </ion-card>
+</template>
+
+<style scoped></style>