feat(分类模块): 实现分类管理功能

新增分类模块相关代码，包括实体类、DTO、Repository、Service和Controller
添加分类数据初始化逻辑和日志记录
实现分类的增删改查及搜索功能

src/main/java/com/qf/myafterprojecy/pojo/Category.java

@@ -0,0 +1,68 @@
+package com.qf.myafterprojecy.pojo;
+
+import javax.persistence.*;
+import javax.validation.constraints.NotBlank;
+import java.time.LocalDateTime;
+
+@Entity
+@Table(name = "category")
+public class Category {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "typeid")
+    private Integer typeid;
+
+    @NotBlank(message = "分类名称不能为空")
+    @Column(name = "typename")
+    private String typename;
+
+    @Column(name = "description")
+    private String description;
+
+    @Column(name = "created_at")
+    private LocalDateTime createdAt;
+
+    @Column(name = "updated_at")
+    private LocalDateTime updatedAt;
+
+    // Getters and Setters
+    public Integer getTypeid() {
+        return typeid;
+    }
+
+    public void setTypeid(Integer typeid) {
+        this.typeid = typeid;
+    }
+
+    public String getTypename() {
+        return typename;
+    }
+
+    public void setTypename(String typename) {
+        this.typename = typename;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    public LocalDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(LocalDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+    public LocalDateTime getUpdatedAt() {
+        return updatedAt;
+    }
+
+    public void setUpdatedAt(LocalDateTime updatedAt) {
+        this.updatedAt = updatedAt;
+    }
+}

src/main/java/com/qf/myafterprojecy/pojo/dto/CategoryDto.java

@@ -0,0 +1,52 @@
+package com.qf.myafterprojecy.pojo.dto;
+
+import java.time.LocalDateTime;
+
+public class CategoryDto {
+    private Integer typeid;
+    private String typename;
+    private String description;
+    private LocalDateTime createdAt;
+    private LocalDateTime updatedAt;
+
+    // Getters and Setters
+    public Integer getTypeid() {
+        return typeid;
+    }
+
+    public void setTypeid(Integer typeid) {
+        this.typeid = typeid;
+    }
+
+    public String getTypename() {
+        return typename;
+    }
+
+    public void setTypename(String typename) {
+        this.typename = typename;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    public LocalDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(LocalDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+    public LocalDateTime getUpdatedAt() {
+        return updatedAt;
+    }
+
+    public void setUpdatedAt(LocalDateTime updatedAt) {
+        this.updatedAt = updatedAt;
+    }
+}