feat: 优化数据中枢 Excel 连接创建交互

- 在新增连接中完成 Excel 上传并自动填写连接名称

- 限制上传格式并提供空表和无表头错误反馈

- 移除旧导入入口和无效测试连接操作

easyflow-ui-admin/packages/effects/common-ui/src/ui/form-modal/form-modal.vue

@@ -15,6 +15,7 @@ interface Props {
   centered?: boolean;
   closable?: boolean;
   closeOnClickModal?: boolean;
+  confirmDisabled?: boolean;
   confirmLoading?: boolean;
   confirmText?: string;
   description?: string;
@@ -40,6 +41,7 @@ const props = withDefaults(defineProps<Props>(), {
   centered: false,
   closable: true,
   closeOnClickModal: false,
+  confirmDisabled: false,
   confirmLoading: false,
   confirmText: '',
   description: '',
@@ -124,6 +126,7 @@ function handleConfirm() {
     :centered="centered"
     :closable="closable"
     :close-on-click-modal="closeOnClickModal"
+    :confirm-disabled="confirmDisabled || submitting"
     :confirm-loading="confirmLoading"
     content-class="p-0"
     :description="description"
@@ -164,7 +167,7 @@ function handleConfirm() {
           </EasyFlowButton>
           <EasyFlowButton
             v-if="showConfirmButton"
-            :disabled="submitting"
+            :disabled="confirmDisabled || submitting"
             :loading="confirmLoading || submitting"
             @click="handleConfirm"
           >