feat: add avatar photo upload via Huihui filecenter

- Add POST /avatars/{id}/upload-photo endpoint
- Use Huihui platform's filecenter API for image upload (same signing mechanism as news_service)
- Add upload button in avatar list table
- Frontend: handleUploadPhoto function with el-upload component
- Updates avatar photo_url in SQLite after successful upload

frontend/src/api/index.js

@@ -90,6 +90,9 @@ export const tailLogFile = (filename, lines = 100) => request.get(`/logs/files/$
 export const getAvatars = (params) => request.get('/avatars', { params })
 export const getAvatarDetail = (id) => request.get(`/avatars/${id}`)
 export const updateAvatarStatus = (id, status) => request.put(`/avatars/${id}/status`, { status })
+export const uploadAvatarPhoto = (id, formData) => request.post(`/avatars/${id}/upload-photo`, formData, {
+  headers: { 'Content-Type': 'multipart/form-data' }
+})
 
 export default request
 export const uploadAvatar = (userId, formData) => request.post(`/users/${userId}/upload-avatar`, formData, { headers: { "Content-Type": "multipart/form-data" } })

frontend/src/views/Avatars.vue

@@ -76,9 +76,14 @@
           </el-tooltip>
         </template>
       </el-table-column>
-      <el-table-column label="操作" width="100" fixed="right">
+      <el-table-column label="操作" width="160" fixed="right">
         <template #default="{ row }">
-          <el-button size="small" @click="openDetail(row)">详情</el-button>
+          <div style="display:flex;gap:4px">
+            <el-upload :show-file-list="false" accept="image/*" :before-upload="(file) => handleUploadPhoto(row, file)">
+              <el-button size="small" :loading="row._uploading"> 上传</el-button>
+            </el-upload>
+            <el-button size="small" @click="openDetail(row)">详情</el-button>
+          </div>
         </template>
       </el-table-column>
     </el-table>
@@ -195,7 +200,7 @@
 <script setup>
 import { ref, computed, onMounted, onUnmounted } from 'vue'
 import { ElMessage } from 'element-plus'
-import { getAvatars, updateAvatarStatus } from '@/api'
+import { getAvatars, updateAvatarStatus, uploadAvatarPhoto } from '@/api'
 
 const avatars = ref([])
 const total = ref(0)
@@ -255,6 +260,27 @@ function openDetail(row) {
   detailVisible.value = true
 }
 
+async function handleUploadPhoto(row, file) {
+  const formData = new FormData()
+  formData.append('file', file)
+  row._uploading = true
+  try {
+    const res = await uploadAvatarPhoto(row.id, formData)
+    if (res.code === 200) {
+      row.photo_url = res.data?.photo_url || row.photo_url
+      ElMessage.success('头像上传成功')
+      loadAvatars()
+    } else {
+      ElMessage.error(res.message || '上传失败')
+    }
+  } catch (e) {
+    ElMessage.error('上传失败：' + (e.message || '未知错误'))
+  } finally {
+    row._uploading = false
+  }
+  return false // prevent el-upload default behavior
+}
+
 function handleAvatarError(e) {
   // 图片加载失败时隐藏 img，只保留 emoji fallback
   e.target.style.display = 'none'