feat(project): 初始化项目基础结构和配置

- 添加 .gitattributes 和 .gitignore 文件以管理版本控制行为- 配置 Spring Boot 应用程序的基本设置，包括数据源和 JPA 设置
- 添加启动 banner 提升应用识别度
- 引入 Maven Wrapper 简化构建环境配置
- 创建基础实体类 UserEntity 并配置相关字段及约束
- 初始化主应用程序入口点和测试类确保可运行性

src/main/java/com/hanserwei/snailsai/SnailsAiApplication.java

@@ -0,0 +1,13 @@
+package com.hanserwei.snailsai;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class SnailsAiApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SnailsAiApplication.class, args);
+    }
+
+}

src/main/java/com/hanserwei/snailsai/entity/UserEntity.java

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+package com.hanserwei.snailsai.entity;
+
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.io.Serial;
+import java.io.Serializable;
+
+
+@Entity
+@Table(
+        name = "users",
+        uniqueConstraints = @UniqueConstraint(
+                name = "UQ_USER_NAME",
+                columnNames = {"user_name"} // 指定应用约束的列
+        )
+)
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class UserEntity implements Serializable {
+
+    @Serial
+    private static final long serialVersionUID = 812305521669146765L;
+
+    // 1. 主键：自增ID
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "id")
+    private Long id;
+
+    // 2. 用户名：不能为空，长度限制
+    @Column(name = "user_name", nullable = false, unique = true, length = 50)
+    private String username;
+
+    // 3. 密码：加密存储，不能为空，长度需足够长
+    @Column(name = "password", nullable = false, length = 100)
+    private String password;
+
+    // 4. 逻辑外键
+    @Column(name = "hobby_id")
+    private Long hobbyId;
+
+    // 5. 补充审计字段 (推荐)
+    @Column(name = "create_time", nullable = false)
+    private java.time.LocalDateTime createTime;
+
+    @Column(name = "update_time")
+    private java.time.LocalDateTime updateTime;
+
+}

src/main/resources/config/application.yml

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+#file: noinspection SpringBootConfigYamlInspection
+spring:
+  application:
+    name: snails-ai
+  banner:
+    location: config/banner.txt
+  jpa:
+    hibernate:
+      ddl-auto: update
+    properties:
+      # 开启 SQL 语句格式化 (重点：让 SQL 易读)
+      hibernate.format_sql: true
+      # 开启 SQL 语法高亮 (重点：让 SQL 醒目)
+      hibernate.highlight_sql: true
+  datasource:
+    driver-class-name: com.mysql.cj.jdbc.Driver
+    url: jdbc:mysql://127.0.0.1:3306/snails_ai?useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&transformedBitIsBoolean=true&allowMultiQueries=true&useSSL=false&allowPublicKeyRetrieval=true
+    username: root
+    password: mysql
+    # HikariCP 连接池配置
+    hikari:
+      maximum-pool-size: 20       # 最大连接数设置为 20
+      minimum-idle: 20            # 保持 20 个空闲连接（与最大连接数一致）
+      connection-timeout: 5000    # 获取连接超时 5 秒
+      max-lifetime: 28800000      # 8 小时（确保在数据库连接超时前被回收）
+logging:
+  level:
+    org.hibernate.SQL: debug
+    # 隐藏掉 Hibernate 冗长的连接池 INFO 信息
+    org.hibernate.orm.connections.pooling: WARN

src/main/resources/config/banner.txt

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+      ___           ___           ___                       ___       ___                    ___
+     /\  \         /\__\         /\  \          ___        /\__\     /\  \                  /\  \          ___
+    /::\  \       /::|  |       /::\  \        /\  \      /:/  /    /::\  \                /::\  \        /\  \
+   /:/\ \  \     /:|:|  |      /:/\:\  \       \:\  \    /:/  /    /:/\ \  \              /:/\:\  \       \:\  \
+  _\:\~\ \  \   /:/|:|  |__   /::\~\:\  \      /::\__\  /:/  /    _\:\~\ \  \            /::\~\:\  \      /::\__\
+ /\ \:\ \ \__\ /:/ |:| /\__\ /:/\:\ \:\__\  __/:/\/__/ /:/__/    /\ \:\ \ \__\          /:/\:\ \:\__\  __/:/\/__/
+ \:\ \:\ \/__/ \/__|:|/:/  / \/__\:\/:/  / /\/:/  /    \:\  \    \:\ \:\ \/__/          \/__\:\/:/  / /\/:/  /
+  \:\ \:\__\       |:/:/  /       \::/  /  \::/__/      \:\  \    \:\ \:\__\                 \::/  /  \::/__/
+   \:\/:/  /       |::/  /        /:/  /    \:\__\       \:\  \    \:\/:/  /                 /:/  /    \:\__\
+    \::/  /        /:/  /        /:/  /      \/__/        \:\__\    \::/  /                 /:/  /      \/__/
+     \/__/         \/__/         \/__/                     \/__/     \/__/                  \/__/

src/test/java/com/hanserwei/snailsai/SnailsAiApplicationTests.java

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+package com.hanserwei.snailsai;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class SnailsAiApplicationTests {
+
+    @Test
+    void contextLoads() {
+    }
+
+}