fix: 模板弹窗click改为显式函数调用

frontend/src/views/KPIList.vue

@@ -4,7 +4,7 @@
     <div class="page-header">
       <h3>KPI字典</h3>
       <div class="header-actions">
-        <el-button @click="showTemplateSelect = true">📋 从模板创建</el-button>
+        <el-button @click="openTemplateDialog">📋 从模板创建</el-button>
         <el-button type="primary" @click="showForm=true; form={}; editMode=false">+ 新建KPI</el-button>
       </div>
     </div>
@@ -589,6 +589,10 @@ function doDelete(id: number) {
 
 // ── 从模板创建 ──
 const showTemplateSelect = ref(false)
+function openTemplateDialog() {
+  showTemplateSelect.value = true
+  loadTemplates()
+}
 const templateLoading = ref(false)
 const templates = ref<any[]>([])
 const templateKeyword = ref('')