fix: 修复付款金额验证逻辑，调整可付款余额计算

yuan

2026-09-22 8b2d472c84386dcd8d1726c5f6edee00f3d5867c

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<template>
  <AIChatSidebar :assistants="assistants" default-assistant="purchase" />
</template>
 
<script setup>
import AIChatSidebar from '@/components/AIChatSidebar/index.vue'
import { purchaseAssistant } from '@/components/AIChatSidebar/assistants'
 
const assistants = [purchaseAssistant]
</script>