feat: add file upload workflow

frontend/src/views/account/OrderDetailView.vue

@@ -4,6 +4,7 @@ import { computed, onMounted, ref } from 'vue'
 import { useRoute, useRouter } from 'vue-router'
 
 import { createDispute } from '@/api/disputes'
+import { uploadFile } from '@/api/files'
 import {
   cancelOrder,
   confirmReceive,
@@ -27,6 +28,7 @@ const confirming = ref(false)
 const returning = ref(false)
 const completing = ref(false)
 const disputing = ref(false)
+const uploadingEvidence = ref(false)
 const order = ref<Order | null>(null)
 const handoffRecords = ref<HandoffRecord[]>([])
 const handoffContent = ref('')
@@ -150,6 +152,23 @@ async function handleCreateDispute() {
   }
 }
 
+async function handleEvidenceUpload(event: Event) {
+  const input = event.target as HTMLInputElement
+  const file = input.files?.[0]
+  input.value = ''
+  if (!file) return
+  uploadingEvidence.value = true
+  try {
+    const uploaded = await uploadFile(file, 'dispute')
+    disputeEvidenceText.value = [disputeEvidenceText.value, uploaded.url].filter(Boolean).join('\n')
+    ElMessage.success('证据文件已上传')
+  } catch (error) {
+    ElMessage.error(readError(error, '上传失败'))
+  } finally {
+    uploadingEvidence.value = false
+  }
+}
+
 function readError(error: unknown, fallback: string) {
   if (typeof error === 'object' && error && 'response' in error) {
     const response = (error as { response?: { data?: { message?: string } } }).response
@@ -257,6 +276,9 @@ function readError(error: unknown, fallback: string) {
         :rows="3"
         placeholder="证据链接，一行一个。开发阶段可先填截图地址或备注链接"
       />
+      <div class="panel-action upload-line">
+        <input type="file" accept="image/jpeg,image/png,image/webp,application/pdf" :disabled="uploadingEvidence" @change="handleEvidenceUpload" />
+      </div>
       <el-button class="panel-action" type="warning" :loading="disputing" @click="handleCreateDispute">提交申诉</el-button>
     </div>
   </section>