feat: add image upload component with backend proxy and auto thumbnail

- Create reusable ImageUpload.vue component (drag-drop, preview, progress)
- Replace URL input fields with ImageUpload in category and template dialogs
- Upload via backend proxy to avoid OSS CORS issues
- Auto-fill thumbnail_url and image dimensions on template image upload

Made-with: Cursor

src/api/marketing.js

@@ -1,5 +1,22 @@
 import request from '../utils/request'
 
+export async function uploadToOSS(file) {
+  const formData = new FormData()
+  formData.append('file', file)
+
+  const res = await request({
+    url: '/api/admin/marketing/upload',
+    method: 'post',
+    data: formData,
+    headers: { 'Content-Type': 'multipart/form-data' },
+    timeout: 60000
+  })
+  return {
+    url: res.data.url,
+    thumbnailUrl: res.data.thumbnail_url || res.data.url
+  }
+}
+
 export function getMarketingStats() {
   return request({
     url: '/api/admin/marketing/stats',

src/components/ImageUpload.vue

@@ -0,0 +1,183 @@
+<template>
+  <div class="image-upload">
+    <div v-if="modelValue" class="preview-wrapper">
+      <el-image
+        :src="modelValue"
+        fit="contain"
+        class="preview-img"
+        :style="previewStyle"
+        :preview-src-list="[modelValue]"
+      />
+      <div class="preview-actions">
+        <el-button link type="primary" @click="triggerUpload">
+          <el-icon><Refresh /></el-icon> 替换
+        </el-button>
+        <el-button link type="danger" @click="handleRemove">
+          <el-icon><Delete /></el-icon> 删除
+        </el-button>
+      </div>
+    </div>
+    <el-upload
+      v-else
+      ref="uploadRef"
+      :auto-upload="false"
+      :show-file-list="false"
+      :on-change="handleFileChange"
+      accept="image/*"
+      drag
+      class="upload-dragger"
+    >
+      <div class="upload-placeholder" :style="placeholderStyle">
+        <el-icon v-if="!uploading" class="upload-icon"><Plus /></el-icon>
+        <el-progress
+          v-if="uploading"
+          type="circle"
+          :percentage="progress"
+          :width="48"
+          :stroke-width="3"
+        />
+        <div class="upload-text">{{ uploading ? '上传中...' : placeholder }}</div>
+      </div>
+    </el-upload>
+    <input
+      ref="hiddenInput"
+      type="file"
+      accept="image/*"
+      style="display: none"
+      @change="handleHiddenInput"
+    />
+  </div>
+</template>
+
+<script setup>
+import { ref } from 'vue'
+import { ElMessage } from 'element-plus'
+import { Plus, Refresh, Delete } from '@element-plus/icons-vue'
+import { uploadToOSS } from '../api/marketing'
+
+const props = defineProps({
+  modelValue: { type: String, default: '' },
+  placeholder: { type: String, default: '点击或拖拽上传图片' },
+  previewWidth: { type: String, default: '120px' },
+  previewHeight: { type: String, default: '120px' },
+  maxSize: { type: Number, default: 10 },
+  onUploaded: { type: Function, default: null }
+})
+
+const emit = defineEmits(['update:modelValue'])
+
+const uploadRef = ref(null)
+const hiddenInput = ref(null)
+const uploading = ref(false)
+const progress = ref(0)
+
+const previewStyle = { width: props.previewWidth, height: props.previewHeight }
+const placeholderStyle = { width: props.previewWidth, height: props.previewHeight }
+
+function triggerUpload() {
+  hiddenInput.value?.click()
+}
+
+function handleRemove() {
+  emit('update:modelValue', '')
+}
+
+async function handleHiddenInput(e) {
+  const file = e.target.files?.[0]
+  if (file) {
+    await doUpload(file)
+  }
+  e.target.value = ''
+}
+
+async function handleFileChange(uploadFile) {
+  if (uploadFile?.raw) {
+    await doUpload(uploadFile.raw)
+  }
+}
+
+async function doUpload(file) {
+  if (file.size > props.maxSize * 1024 * 1024) {
+    ElMessage.warning(`图片大小不能超过 ${props.maxSize}MB`)
+    return
+  }
+
+  uploading.value = true
+  progress.value = 0
+
+  const timer = setInterval(() => {
+    if (progress.value < 90) progress.value += 10
+  }, 200)
+
+  try {
+    const result = await uploadToOSS(file)
+    progress.value = 100
+    emit('update:modelValue', result.url)
+    if (props.onUploaded) props.onUploaded(result, file)
+  } catch (e) {
+    console.error('上传失败:', e)
+    ElMessage.error('图片上传失败，请重试')
+  } finally {
+    clearInterval(timer)
+    uploading.value = false
+    progress.value = 0
+  }
+}
+</script>
+
+<style scoped>
+.image-upload {
+  display: inline-block;
+}
+
+.preview-wrapper {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 6px;
+}
+
+.preview-img {
+  border-radius: 6px;
+  border: 1px solid #e4e7ed;
+  background: #fafafa;
+}
+
+.preview-actions {
+  display: flex;
+  gap: 8px;
+}
+
+.upload-dragger :deep(.el-upload-dragger) {
+  padding: 0;
+  border: none;
+  background: none;
+}
+
+.upload-placeholder {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  gap: 6px;
+  border: 1px dashed #d9d9d9;
+  border-radius: 6px;
+  background: #fafafa;
+  cursor: pointer;
+  transition: border-color 0.2s;
+}
+
+.upload-placeholder:hover {
+  border-color: #409eff;
+}
+
+.upload-icon {
+  font-size: 24px;
+  color: #8c939d;
+}
+
+.upload-text {
+  font-size: 12px;
+  color: #8c939d;
+}
+</style>

src/views/marketing/index.vue

@@ -161,8 +161,14 @@
         <el-form-item label="名称" required>
           <el-input v-model="categoryForm.name" maxlength="50" show-word-limit />
         </el-form-item>
-        <el-form-item label="图标URL">
+        <el-form-item label="图标">
-          <el-input v-model="categoryForm.icon" placeholder="可选：填写图标链接" />
+          <ImageUpload
+            v-model="categoryForm.icon"
+            placeholder="上传图标"
+            preview-width="64px"
+            preview-height="64px"
+            :max-size="2"
+          />
         </el-form-item>
         <el-form-item label="排序">
           <el-input-number v-model="categoryForm.sort_order" :min="0" :max="9999" />
@@ -191,11 +197,24 @@
             <el-option v-for="item in categories" :key="item.id" :label="item.name" :value="item.id" />
           </el-select>
         </el-form-item>
-        <el-form-item label="图片URL" required>
+        <el-form-item label="模板图片" required>
-          <el-input v-model="templateForm.image_url" placeholder="模板原图 URL" />
+          <ImageUpload
+            v-model="templateForm.image_url"
+            placeholder="上传模板原图"
+            preview-width="160px"
+            preview-height="200px"
+            :max-size="10"
+            :on-uploaded="onTemplateImageUploaded"
+          />
         </el-form-item>
-        <el-form-item label="缩略图URL">
+        <el-form-item label="缩略图">
-          <el-input v-model="templateForm.thumbnail_url" placeholder="可选：缩略图 URL" />
+          <ImageUpload
+            v-model="templateForm.thumbnail_url"
+            placeholder="上传缩略图（可选）"
+            preview-width="100px"
+            preview-height="100px"
+            :max-size="5"
+          />
         </el-form-item>
         <el-form-item label="宽度(px)">
           <el-input-number v-model="templateForm.width" :min="0" :max="10000" />
@@ -221,6 +240,7 @@
 <script setup>
 import { onMounted, reactive, ref } from 'vue'
 import { ElMessage } from 'element-plus'
+import ImageUpload from '../../components/ImageUpload.vue'
 import {
   createMarketingCategory,
   createMarketingTemplate,
@@ -439,6 +459,18 @@ const openTemplateDialog = (row) => {
   templateDialogVisible.value = true
 }
 
+const onTemplateImageUploaded = (result) => {
+  if (result.thumbnailUrl && !templateForm.thumbnail_url) {
+    templateForm.thumbnail_url = result.thumbnailUrl
+  }
+  const img = new Image()
+  img.onload = () => {
+    templateForm.width = img.naturalWidth
+    templateForm.height = img.naturalHeight
+  }
+  img.src = result.url
+}
+
 const saveTemplate = async () => {
   if (!(templateForm.title || '').trim()) {
     ElMessage.warning('请先填写模板名称')
@@ -449,7 +481,7 @@ const saveTemplate = async () => {
     return
   }
   if (!(templateForm.image_url || '').trim()) {
-    ElMessage.warning('请先填写图片URL')
+    ElMessage.warning('请先上传模板图片')
     return
   }