feat(project-demand): 优化需求提交按钮显示逻辑

- 在 routerName 为 Requirement/add 且 formData.state 为 '3' 时显示提交按钮
- 在 routerName为 Requirement/edit 且 formData.state为 '3' 时显示重新提交按钮
- 为 formData 添加 state 字段初始化为 ''

src/views/project-demand/requirement/add.vue

@@ -121,8 +121,8 @@
     </div>
     <div style="width: 100%;height: 30px"></div>
     <div class="oper-page-btn">
-      <el-button color="#DED0B2" v-if="routerName==='Requirement/add'" @click="handleSubmit(demandForm)">提交</el-button>
-      <el-button color="#DED0B2" v-else @click="handleResubmit(demandForm)">重新提交</el-button>
+      <el-button color="#DED0B2" v-if="routerName==='Requirement/add'&&formData.state=='3'" @click="handleSubmit(demandForm)">提交</el-button>
+      <el-button color="#DED0B2" v-else-if="routerName==='Requirement/edit'&&formData.state=='3'" @click="handleResubmit(demandForm)">重新提交</el-button>
       <el-button @click="handleBack">返回</el-button>
     </div>
     <company-picker :multiple="true" ref="companyRef" title="请选择征集公司" @ok="sureSelectedCompany" @cancelOrClear="cancelSelectedCompany"
@@ -180,6 +180,7 @@ const formData = ref({
   collectType: '科技创新与信息化系统建设',
   deadline: '',
   collectExplain: '',
+  state: '',
   fileList: [],
   isSpecialFund: false
 })