feat(orderTrack): 新增合同上传弹窗及上传功能

- 新增“新增合同”弹窗组件，支持选择并上传PDF格式合同文件
- 添加表单验证，确保只能上传PDF格式文件
- 实现上传成功和失败的消息提示及处理逻辑
- 上传成功后自动关闭弹窗并刷新页面数据
- 扩展组件依赖，增加element-ui中Form和FormItem的使用
- 新增相关状态数据和方法，管理弹窗显示和文件列表清理

src/views/OrderTrack/goodsDetail.vue

@@ -115,6 +115,21 @@
             </div>
         </div>
 
+        <!-- 新增合同弹窗 -->
+        <el-dialog title="新增合同" :visible.sync="addContractDialogVisible" width="500px" :before-close="closeAddContractDialog">
+            <el-form :model="addContractForm" label-width="80px">
+                <el-form-item label="合同文件" required>
+                    <el-upload ref="contractUpload" :headers="{ Authorization: 'Bearer ' + token }" :action="addContractUrl" :data="{ purchase_id: id }" :on-success="handleAddContractSuccess" :on-error="handleAddContractError" :before-upload="beforeAddContractUpload" :file-list="addContractFileList" accept=".pdf" :limit="1">
+                        <el-button type="primary">选择文件</el-button>
+                        <div slot="tip" class="el-upload__tip">只能上传PDF文件</div>
+                    </el-upload>
+                </el-form-item>
+            </el-form>
+            <div slot="footer" class="dialog-footer">
+                <el-button @click="closeAddContractDialog">关闭</el-button>
+            </div>
+        </el-dialog>
+
         <!-- 签署合同弹窗 -->
         <el-dialog title="签署合同" :visible.sync="signDialogVisible" width="900px" :before-close="closeSignDialog">
             <div class="sign-contract-content" @scroll="handleScroll" ref="contractContent">
@@ -321,13 +336,13 @@
     import Vue from 'vue';
     import Tool from '../../tool'
     import Menu from "@/components/menu.vue";
-    import { Col, Message, MessageBox, Pagination, Row, Table, TableColumn, Select, Option, Link, Upload, Tooltip, Dialog } from 'element-ui';
+    import { Col, Message, MessageBox, Pagination, Row, Table, TableColumn, Select, Option, Link, Upload, Tooltip, Dialog, Form, FormItem } from 'element-ui';
     import { NODE_ENVS } from "../../ajax";
 
     Vue.prototype.$message = Message;
     Vue.prototype.$confirm = MessageBox.confirm;
     Vue.use(Pagination);
-    Vue.use(TableColumn).use(Table).use(Row).use(Col).use(Select).use(Option).use(Link).use(Upload).use(Tooltip).use(Dialog);
+    Vue.use(TableColumn).use(Table).use(Row).use(Col).use(Select).use(Option).use(Link).use(Upload).use(Tooltip).use(Dialog).use(Form).use(FormItem);
     export default {
         name: "orderTrackGoodsDetail",
         data() {
@@ -349,7 +364,12 @@
                 },
                 signDialogVisible: false,
                 signContractData: {},
-                disabled: true
+                disabled: true,
+                // 新增合同相关数据
+                addContractDialogVisible: false,
+                addContractForm: {},
+                addContractUrl: NODE_ENVS + '/api/purchase/addContract',
+                addContractFileList: []
             };
         },
         created() {
@@ -412,7 +432,48 @@
             },
             // 新增合同
             addContract() {
+                this.addContractDialogVisible = true;
+                this.addContractFileList = [];
+            },
+            // 关闭新增合同弹窗
+            closeAddContractDialog() {
+                this.addContractDialogVisible = false;
+                this.addContractFileList = [];
+                this.$refs.contractUpload.clearFiles();
+            },
+            // 上传前验证
+            beforeAddContractUpload(file) {
+                var isPdf = file.type === 'application/pdf';
 
+                if (!isPdf) {
+                    this.$message.error('上传文件只能是 PDF 格式!');
+                    return false;
+                }
+
+                return true;
+            },
+            // 上传成功回调
+            handleAddContractSuccess(response, file, fileList) {
+                if (response.code === 0) {
+                    this.$message({
+                        message: '合同上传成功',
+                        type: 'success'
+                    });
+                    this.closeAddContractDialog();
+                    this.getData(); // 刷新页面数据
+                } else {
+                    this.$message({
+                        message: response.msg || '上传失败',
+                        type: 'error'
+                    });
+                }
+            },
+            // 上传失败回调
+            handleAddContractError(err, file, fileList) {
+                this.$message({
+                    message: '上传失败，请重试',
+                    type: 'error'
+                });
             },
             //下载猎芯合同
             downloadContract() {