feat(cms): 添加自定义链接地址支持

- 在CmsNavigation实体中新增url字段，支持导航外链和自定义地址
- 在CmsNavigationImportParam中增加url导入字段，支持Excel导入
- 在CmsNavigationController中设置url值，实现自定义链接路径优先跳转

docs/sql/2026-07-21_cms_navigation_add_url.sql

@@ -0,0 +1,32 @@
+-- ============================================================
+-- 新增 cms_navigation.url 字段
+-- 用途: 存储栏目/导航的自定义链接地址, 与 path(路由地址) 相互独立。
+--       后台保存时写入该字段; 网站端导航优先使用 url, 未设置则回退 path。
+-- 配合代码侧改动:
+--   - CmsNavigation 实体新增 url 字段 (MyBatis-Plus 自动映射列 url)
+--   - 网站端 getNavLink 优先使用 url; 外链原样返回, 不追加 navId
+-- 执行环境: 各租户业务库 (cms_navigation 为全局表)
+-- 执行方式: 幂等, 可重复执行 (已存在 url 列则跳过)
+-- ============================================================
+
+-- 1. 幂等新增 url 列
+SET @db = DATABASE();
+SET @exists = (
+    SELECT COUNT(*)
+    FROM information_schema.columns
+    WHERE table_schema = @db
+      AND table_name   = 'cms_navigation'
+      AND column_name  = 'url'
+);
+SET @sql = IF(
+    @exists = 0,
+    'ALTER TABLE cms_navigation ADD COLUMN url VARCHAR(500) DEFAULT NULL COMMENT ''自定义链接地址(优先级高于path)''',
+    'SELECT 1 AS skipped'
+);
+PREPARE stmt FROM @sql;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;
+
+-- 2. 验证字段已存在
+-- 预期: url VARCHAR(500) DEFAULT NULL
+SHOW COLUMNS FROM cms_navigation LIKE 'url';

src/main/java/com/gxwebsoft/cms/controller/CmsNavigationController.java

@@ -322,6 +322,7 @@ public class CmsNavigationController extends BaseController {
     nav.setModel(StrUtil.isBlank(param.getModel()) ? "page" : param.getModel());
     nav.setCode(param.getCode());
     nav.setPath(param.getPath());
+    nav.setUrl(param.getUrl());
     nav.setComponent(param.getComponent());
     nav.setTarget(param.getTarget());
     nav.setIcon(param.getIcon());

src/main/java/com/gxwebsoft/cms/entity/CmsNavigation.java

@@ -53,6 +53,9 @@ public class CmsNavigation implements Serializable {
     @Schema(description = "菜单路由地址")
     private String path;
 
+    @Schema(description = "自定义链接地址(优先级高于path, 用于导航跳转外链/自定义地址)")
+    private String url;
+
     @Schema(description = "菜单组件地址, 目录可为空")
     private String component;
 

src/main/java/com/gxwebsoft/cms/param/CmsNavigationImportParam.java

@@ -33,6 +33,9 @@ public class CmsNavigationImportParam implements Serializable {
     @Excel(name = "菜单路由地址")
     private String path;
 
+    @Excel(name = "自定义链接地址")
+    private String url;
+
     @Excel(name = "菜单组件地址")
     private String component;