revert: 员工端附件上传回退为文件选择

撤销 7d1e482（改为拍照/相册选图），恢复 H5 chooseFile / 小程序
chooseMessageFile / App chooseImage 三段分支与「上传附件」文案。

src/packageApproval/pages/form-coordination.vue

@@ -91,9 +91,9 @@
       <view v-if="attachments.length === 0" class="empty">暂无附件</view>
 
       <button class="upload-button" :loading="uploading" @click="chooseAttachment">
-        上传图片（{{ attachments.length }}/9）
+        上传附件（{{ attachments.length }}/9）
       </button>
-      <text class="hint">支持拍照或从相册选择图片（jpg/png），单张不超过20MB</text>
+      <text class="hint">支持 jpg/jpeg/png/pdf/doc/docx/xls/xlsx，单张不超过20MB</text>
     </uni-card>
 
     <view class="footer">
@@ -339,8 +339,24 @@ function chooseAttachment() {
     return;
   }
   const remaining = 9 - attachments.value.length;
-  // 统一改为拍照/相册选图：H5 文件选择与小程序会话选文件在手机上点击无响应
-  uni.chooseImage({
+  // #ifdef H5
+  (uni as any).chooseFile({
+    count: remaining,
+    extension: ['.jpg', '.jpeg', '.png', '.pdf', '.doc', '.docx', '.xls', '.xlsx'],
+    success: (result: any) => uploadFiles(result.tempFiles || []),
+    fail: () => undefined
+  });
+  // #endif
+  // #ifdef MP-WEIXIN
+  (uni as any).chooseMessageFile({
+    count: remaining,
+    type: 'file',
+    success: (result: any) => uploadFiles(result.tempFiles || []),
+    fail: () => undefined
+  });
+  // #endif
+  // #ifdef APP-PLUS
+  (uni as any).chooseImage({
     count: remaining,
     sizeType: ['compressed'],
     sourceType: ['camera', 'album'],
@@ -350,6 +366,7 @@ function chooseAttachment() {
       ),
     fail: () => undefined
   });
+  // #endif
 }
 
 async function uploadFiles(files: Array<{ path: string; name?: string; size?: number }>) {