feat(recycle-bin): 实现回收站功能

- 在数据库中添加逻辑删除字段和相关索引- 新增回收站相关实体类和接口
- 实现回收站列表查询、项目恢复、永久删除和清空回收站等功能
- 前端集成回收站接口，支持回收站页面操作

biji-houdaun/src/main/java/com/test/bijihoudaun/entity/MarkdownFile.java

@@ -3,17 +3,19 @@ package com.test.bijihoudaun.entity;
 import com.baomidou.mybatisplus.annotation.IdType;
 import com.baomidou.mybatisplus.annotation.TableField;
 import com.baomidou.mybatisplus.annotation.TableId;
+import com.baomidou.mybatisplus.annotation.TableLogic;
 import com.baomidou.mybatisplus.annotation.TableName;
 import com.fasterxml.jackson.annotation.JsonFormat;
 import io.swagger.v3.oas.annotations.media.Schema;
 import lombok.Data;
 
+import java.io.Serializable;
 import java.util.Date;
 
 @Data
 @Schema(name = "文本实体")
 @TableName("markdown_file")
-public class MarkdownFile {
+public class MarkdownFile implements Serializable {
     @Schema(description = "文本id",implementation = Long.class)
     @TableId(type = IdType.AUTO)
     @JsonFormat(shape = JsonFormat.Shape.STRING) // 仅作用于此字段
@@ -33,4 +35,14 @@ public class MarkdownFile {
     private Date createdAt;
     @Schema(description = "更新时间",implementation = Date.class)
     private Date updatedAt;
+
+    @Schema(description = "是否删除 0-未删除 1-已删除", implementation = Integer.class)
+    @TableLogic
+    private Integer isDeleted;
+
+    @Schema(description = "删除时间", implementation = Date.class)
+    private Date deletedAt;
+
+    @Schema(description = "删除人ID", implementation = Long.class)
+    private Long deletedBy;
 }