feat(website): 新增后台网站设置扩展字段支持

- 在 CmsWebsite 实体中添加 slogan、copyright、qrCode、socialLinks、seoTitle、seoDescription 字段
- 更新 CmsWebsiteMapper.xml 增加对新增字段的动态更新支持
- 扩展字段用于后台「网站设置」页面维护，公开站按需展示

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

@@ -0,0 +1,6 @@
+-- 去掉「案例(case)」的 .html 后缀
+-- 后端 CmsNavigationServiceImpl.saveAsync 第105行会读取 cms_model.suffix 并追加到路径上，
+-- 若 cms_model 中 case 行的 suffix = '.html' 则路径变成 /case/xxx.html
+-- 本 SQL 将其置为 NULL，使 case 与 article/product/page 保持一致（无后缀）
+
+UPDATE cms_model SET suffix = NULL WHERE model = 'case';

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

@@ -163,6 +163,27 @@ public class CmsWebsite implements Serializable {
     @Schema(description = "网站描述")
     private String content;
 
+    // ─── 后台「网站设置」扩展字段（website-admin /about 页面维护） ──────────
+    // 这些字段在后台网站设置页维护，公开站展示时按需读取。
+
+    @Schema(description = "品牌标语/Slogan")
+    private String slogan;
+
+    @Schema(description = "版权信息")
+    private String copyright;
+
+    @Schema(description = "微信公众号二维码")
+    private String qrCode;
+
+    @Schema(description = "社交/外部链接（JSON 数组字符串）")
+    private String socialLinks;
+
+    @Schema(description = "SEO 标题")
+    private String seoTitle;
+
+    @Schema(description = "SEO 描述")
+    private String seoDescription;
+
     @Schema(description = "备注")
     private String comments;
 

src/main/java/com/gxwebsoft/cms/mapper/xml/CmsWebsiteMapper.xml

@@ -270,6 +270,24 @@
       <if test="param.content != null">
         content = #{param.content},
       </if>
+      <if test="param.slogan != null">
+        slogan = #{param.slogan},
+      </if>
+      <if test="param.copyright != null">
+        copyright = #{param.copyright},
+      </if>
+      <if test="param.qrCode != null">
+        qr_code = #{param.qrCode},
+      </if>
+      <if test="param.socialLinks != null">
+        social_links = #{param.socialLinks},
+      </if>
+      <if test="param.seoTitle != null">
+        seo_title = #{param.seoTitle},
+      </if>
+      <if test="param.seoDescription != null">
+        seo_description = #{param.seoDescription},
+      </if>
       <if test="param.deleted != null">
         deleted = #{param.deleted},
       </if>