refactor(security): Ports & Adapters 架构重构｜解除反向依赖｜抽离 Security Starter 准备

- 新增 2 个端口接口（UserAuthenticationPort / PermissionPort）+ 1 个适配器（PermissionAdapter）
- SecurityUserDetails 用 roles(Set<String>) 替代 authorities，消除 Jackson 序列化问题
- 删除 UserSession，Redis / JWT 直存 SecurityUserDetails
- SecurityUserDetailsService / PermissionService 注入 Port 替代 system Service

src/main/java/com/youlai/boot/common/constant/JwtClaimConstants.java

@@ -33,9 +33,9 @@ public interface JwtClaimConstants {
     String DATA_SCOPES = "dataScopes";
 
     /**
-     * 权限(角色Code)集合
+     * 角色编码集合（不带 ROLE_ 前缀）
      */
-    String AUTHORITIES = "authorities";
+    String ROLES = "roles";
 
     /**
      * Token 版本号

src/main/java/com/youlai/boot/common/enums/SocialPlatformEnum.java

@@ -0,0 +1,30 @@
+package com.youlai.boot.common.enums;
+
+import com.baomidou.mybatisplus.annotation.EnumValue;
+import com.youlai.boot.common.base.IBaseEnum;
+import lombok.Getter;
+
+/**
+ * 第三方登录平台类型枚举
+ */
+@Getter
+public enum SocialPlatformEnum implements IBaseEnum<String> {
+
+    WECHAT_MINI("WECHAT_MINI", "微信小程序"),
+    WECHAT_MP("WECHAT_MP", "微信公众号"),
+    WECHAT_OPEN("WECHAT_OPEN", "微信开放平台"),
+    ALIPAY("ALIPAY", "支付宝"),
+    QQ("QQ", "QQ"),
+    APPLE("APPLE", "Apple ID");
+
+    @EnumValue
+    private final String value;
+
+    private final String label;
+
+    SocialPlatformEnum(String value, String label) {
+        this.value = value;
+        this.label = label;
+    }
+
+}