修复 MinIO 端口冲突并优化顶栏 IP 展示

- MinIO 宿主机端口改为 9100/9101，避免与 hfb-minio 冲突
- 测试与配置默认 PublicBase 同步为 9100
- 工作台顶栏固定展示 IP|地区，详情回填会话元数据
- 种子数据补充访客 IP/地区示例

server/internal/handler/security_integration_test.go

@@ -36,9 +36,9 @@ func setupRouter(t *testing.T) *gin.Engine {
 	model.DB = db
 	middleware.InitJWT("test-secret")
 	router := gin.New()
-	mem := storage.NewMemory("http://localhost:9000/kefu")
+	mem := storage.NewMemory("http://localhost:9100/kefu")
 	handler.SetupRoutes(router, mem, config.StorageConfig{
-		PublicBase:   "http://localhost:9000/kefu",
+		PublicBase:   "http://localhost:9100/kefu",
 		MaxUploadMB:  10,
 		MaxImageEdge: 1920,
 		WebPQuality:  80,