feat: gate overseas receiving and harden phase4 workflows

auth/src/main/java/com/baiyue/auth/controller/InternalAccountController.java

@@ -3,12 +3,16 @@ package com.baiyue.auth.controller;
 import com.baiyue.auth.dto.AccountManagementDtos.*;
 import com.baiyue.auth.service.AccountManagementService;
 import com.baiyue.auth.service.AuthService;
+import com.baiyue.auth.service.OverseasSessionValidationService;
+import com.baiyue.auth.dto.OverseasSessionValidationDtos;
 import com.baiyue.common.core.api.ApiResponse;
 import com.baiyue.common.core.api.ResultCode;
 import com.baiyue.common.core.exception.BizException;
 import jakarta.annotation.PostConstruct;
 import jakarta.annotation.Resource;
 import jakarta.validation.Valid;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.web.bind.annotation.*;
 
@@ -18,11 +22,14 @@ import java.security.MessageDigest;
 /** 仅供可信内部服务调用的账号管理接口。 */
 @RestController
 @RequestMapping("/internal/auth/accounts")
+@Tag(name = "Internal Auth / 内部认证", description = "Service-token protected internal account and overseas PDA session APIs")
 public class InternalAccountController {
     @Resource
     private AccountManagementService service;
     @Resource
     private AuthService authService;
+    @Resource
+    private OverseasSessionValidationService overseasSessionValidationService;
 
     @Value("${baiyue.security.internal-service-token}")
     private String configuredToken;
@@ -64,6 +71,15 @@ public class InternalAccountController {
             @Valid @RequestBody RevokeAccountSessionsRequest request) {
         verify(token); service.revokeSessions(request.accountIds()); return ApiResponse.success(null);
     }
+    @PostMapping("/overseas-session/validate")
+    @Operation(summary = "Validate verified overseas PDA claims / 校验已验签的海外PDA声明",
+            description = "Accepts only claims extracted after Gateway JWT verification; raw tokens and user credentials are forbidden.")
+    public ApiResponse<OverseasSessionValidationDtos.Response> validateOverseasSession(
+            @RequestHeader(value="X-Internal-Service-Token", required=false) String token,
+            @Valid @RequestBody OverseasSessionValidationDtos.Request request) {
+        verify(token);
+        return ApiResponse.success(overseasSessionValidationService.validate(request));
+    }
     @PutMapping("/{id}/profile")
     public ApiResponse<Void> profile(@RequestHeader(value="X-Internal-Service-Token", required=false) String token,
                                      @PathVariable Long id, @Valid @RequestBody UpdateAccountProfileRequest request) {

auth/src/main/java/com/baiyue/auth/dto/OverseasSessionValidationDtos.java

@@ -0,0 +1,29 @@
+package com.baiyue.auth.dto;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+import jakarta.validation.constraints.NotNull;
+
+/** 海外 PDA 已验签身份的实时会话校验契约；绝不接收 raw JWT 或用户凭据。 */
+public final class OverseasSessionValidationDtos {
+    private OverseasSessionValidationDtos() { }
+
+    @Schema(name = "OverseasSessionValidationRequest",
+            description = "Claims extracted only after overseas Gateway verifies the JWT signature")
+    public record Request(
+            @NotNull Long userId,
+            @NotNull Integer tokenVersion,
+            Long overseasWarehouseId) { }
+
+    @Schema(name = "OverseasSessionValidationResponse")
+    public record Response(boolean valid, FailureReason failureReason) {
+        public static Response accepted() { return new Response(true, null); }
+        public static Response rejected(FailureReason reason) { return new Response(false, reason); }
+    }
+
+    public enum FailureReason {
+        ACCOUNT_INVALID,
+        TOKEN_VERSION_MISMATCH,
+        WAREHOUSE_UNBOUND,
+        WAREHOUSE_MISMATCH
+    }
+}

auth/src/main/java/com/baiyue/auth/service/OverseasSessionValidationService.java

@@ -0,0 +1,38 @@
+package com.baiyue.auth.service;
+
+import com.baiyue.auth.client.AuthorizationLoader;
+import com.baiyue.auth.dto.OverseasSessionValidationDtos.FailureReason;
+import com.baiyue.auth.dto.OverseasSessionValidationDtos.Request;
+import com.baiyue.auth.dto.OverseasSessionValidationDtos.Response;
+import com.baiyue.auth.entity.AuthAccount;
+import com.baiyue.auth.repository.AuthAccountRepository;
+import jakarta.annotation.Resource;
+import org.springframework.stereotype.Service;
+
+import java.util.Objects;
+
+/** 实时核对海外 PDA token 的账号版本与当前 IAM 仓绑定。 */
+@Service
+public class OverseasSessionValidationService {
+    @Resource private AuthAccountRepository accounts;
+    @Resource private AuthorizationLoader authorizationLoader;
+
+    public Response validate(Request request) {
+        AuthAccount account = accounts.findById(request.userId());
+        if (account == null || !"ACTIVE".equals(account.getAccountStatus())) {
+            return Response.rejected(FailureReason.ACCOUNT_INVALID);
+        }
+        int currentVersion = account.getTokenVersion() == null ? 0 : account.getTokenVersion();
+        if (currentVersion != request.tokenVersion()) {
+            return Response.rejected(FailureReason.TOKEN_VERSION_MISMATCH);
+        }
+        Long currentWarehouseId = authorizationLoader.load(account).getOverseasWarehouseId();
+        if (currentWarehouseId == null || request.overseasWarehouseId() == null) {
+            return Response.rejected(FailureReason.WAREHOUSE_UNBOUND);
+        }
+        if (!Objects.equals(currentWarehouseId, request.overseasWarehouseId())) {
+            return Response.rejected(FailureReason.WAREHOUSE_MISMATCH);
+        }
+        return Response.accepted();
+    }
+}

auth/src/main/java/com/baiyue/auth/service/OverseasTokenService.java

@@ -60,6 +60,7 @@ public class OverseasTokenService {
             .claim("app_code", authorization.getAppCode()).claim("client_type", authorization.getClientType())
             .claim("roles", authorization.getRoles())
             .claim("authorities", overseasAuthorities(authorization.getPermissions()))
+            .claim("token_version", account.getTokenVersion() == null ? 0 : account.getTokenVersion())
             .claim("permission_version", authorization.getPermissionVersion() == null ? 0L : authorization.getPermissionVersion());
         if (authorization.getOverseasWarehouseId() != null) {
             claimsBuilder.claim("overseas_warehouse_id", authorization.getOverseasWarehouseId());