Revert "refactor(template): 移除模板列表页面的创建按钮"

This reverts commit b2bdf9e066.

frontend/src/pages/DataAnnotation/Template/TemplateList.tsx

@@ -251,6 +251,13 @@ const TemplateList: React.FC = () => {
                       onClearFilters={() => setSearchParams({ ...searchParams, filter: {} })}
                     />
                 </div>
+
+                {/* Right side: Create button */}
+                <div className="flex items-center gap-2">
+                    <Button type="primary" icon={<PlusOutlined />} onClick={handleCreate}>
+                        创建模板
+                    </Button>
+                </div>
             </div>
 
             <Card>