refactor: 全站改用数据库动态驱动，支持分类与统计动态查询，并全面将作者及博主标识由'旺总'切换为'小东'

backend/src/main/java/com/example/blog/config/DataInitializer.java

@@ -49,7 +49,7 @@ public class DataInitializer implements CommandLineRunner {
                     "相比传统臃肿的面料，1Panel 深度拥抱 **Docker 容器化**，所有应用（MySQL、OpenResty、Gitea）完全容器隔离，真正做到“环境随用随建，数据挂载持久化”。\n\n" +
                     "```bash\n# 快速检查 Docker 运行状态\ndocker ps --format \"table {{.Names}}\\t{{.Status}}\\t{{.Ports}}\"\n```\n\n" +
                     "> 💡 **运维心得**：永远在云平台控制台统一放行防火墙端口，切勿盲目在系统内部启用 UFW，避免失联风险。");
-            p1.setAuthor("旺总");
+            p1.setAuthor("小东");
             p1.setCategoryName("云原生 & Linux");
             p1.setTags("GCP,Ubuntu,1Panel,Linux");
             p1.setReadTime("4 min");
@@ -72,7 +72,7 @@ public class DataInitializer implements CommandLineRunner {
                     "3. **清空全局默认 Prompt**：消除了默认附带的 2050 历史 Token，读题耗时从 60s 骤降至 0.2s！\n\n" +
                     "```bash\n# 测试模型运行性能\ndocker exec -it 1Panel-ollama-nzre ollama run qwen2.5:1.5b --verbose\n```\n\n" +
                     "> 纯 CPU 跑 7B 参数是物理带宽瓶颈，日常开发推荐搭配 1.5B~3B 模型，速度与逻辑达到最佳平衡！");
-            p2.setAuthor("旺总");
+            p2.setAuthor("小东");
             p2.setCategoryName("AI & 本地模型");
             p2.setTags("DeepSeek,Ollama,OpenWebUI,性能调优");
             p2.setReadTime("6 min");
@@ -90,7 +90,7 @@ public class DataInitializer implements CommandLineRunner {
                     "- 数据文件挂载至命名卷 `mysql_data`，容器重启或重建数据零丢失；\n" +
                     "- Spring Data JPA 实现对象关系映射，自动完成数据库结构维护；\n" +
                     "- 统一 RESTful API 与响应封装，全栈开发得心应手！");
-            p3.setAuthor("旺总");
+            p3.setAuthor("小东");
             p3.setCategoryName("全栈开发 & CI/CD");
             p3.setTags("Spring Boot,MySQL,JPA,CI/CD");
             p3.setReadTime("5 min");
@@ -99,5 +99,18 @@ public class DataInitializer implements CommandLineRunner {
 
             postRepository.saveAll(Arrays.asList(p1, p2, p3));
         }
+
+        // 3. 自动迁移平滑更新：如果数据库中存留历史旧作者"旺总"，自动同步更新为"小东"
+        List<Post> existingPosts = postRepository.findAll();
+        boolean hasMigration = false;
+        for (Post p : existingPosts) {
+            if ("旺总".equals(p.getAuthor())) {
+                p.setAuthor("小东");
+                hasMigration = true;
+            }
+        }
+        if (hasMigration) {
+            postRepository.saveAll(existingPosts);
+        }
     }
 }

backend/src/main/java/com/example/blog/entity/Post.java

@@ -21,7 +21,7 @@ public class Post {
     private String content;
 
     @Column(length = 50)
-    private String author = "旺总";
+    private String author = "小东";
 
     @Column(name = "category_name", length = 50)
     private String categoryName = "技术杂谈";
@@ -51,7 +51,7 @@ public class Post {
         if (updatedAt == null) updatedAt = LocalDateTime.now();
         if (views == null) views = 0;
         if (likes == null) likes = 0;
-        if (author == null) author = "旺总";
+        if (author == null) author = "小东";
         if (categoryName == null) categoryName = "技术杂谈";
         if (readTime == null) readTime = "3 min";
         if (status == null) status = "PUBLISHED";