feat(demo-vue): 新闻页面与行业动态页面新增多语言支持

- 升级组件与页面，支持根据语言环境（中/英）条件渲染标题与内容
- 在 IndustryNews 和 News 实体类中新增英文标题、英文内容字段
- sql导出demo_news_full_dump_utf8mb4_2026-04-28.sql

demo4/src/main/java/com/example/demo/entity/IndustryNews.java

@@ -14,7 +14,9 @@ public class IndustryNews {
     @TableId(type = IdType.AUTO)
     private Long id;
     private String title;
+    private String titleEn;
     private String content;
+    private String contentEn;
     private Integer views;
     private LocalDate publishDate;
     private LocalDateTime createTime;

demo4/src/main/java/com/example/demo/entity/News.java

@@ -15,7 +15,9 @@ import java.time.LocalDateTime;
         @TableId(type = IdType.AUTO)
         private Long id;
         private String title;
+        private String titleEn;
         private String content;
+        private String contentEn;
         private Integer views;
         private LocalDate publishDate;
         private LocalDateTime createTime;

demo4/src/main/resources/application.yml

@@ -7,7 +7,7 @@ spring:
     driver-class-name: com.mysql.cj.jdbc.Driver
     url: jdbc:mysql://localhost:3306/demo_news?characterEncoding=UTF-8&&serverTimezone=GMT
     username: root
-    password: 123456
+    password: 135827
     type: com.alibaba.druid.pool.DruidDataSource
     druid:
       initial-size: 5