feat(admin): add admin endpoint to list user devices with JPush registration IDs

- Add AdminDeviceTokenResponse DTO including push_token (RegistrationID) for push debugging
- Add DeviceTokenToAdminResponse and DeviceTokensToAdminResponse converters
- Inject PushService into AdminUserHandler for retrieving user devices
- Register GET /api/v1/admin/users/:id/devices route for querying target user's device tokens

internal/handler/admin_user_handler.go

@@ -14,12 +14,14 @@ import (
 // AdminUserHandler 管理端用户处理器
 type AdminUserHandler struct {
 	adminUserService service.AdminUserService
+	pushService      service.PushService
 }
 
 // NewAdminUserHandler 创建管理端用户处理器
-func NewAdminUserHandler(adminUserService service.AdminUserService) *AdminUserHandler {
+func NewAdminUserHandler(adminUserService service.AdminUserService, pushService service.PushService) *AdminUserHandler {
 	return &AdminUserHandler{
 		adminUserService: adminUserService,
+		pushService:      pushService,
 	}
 }
 
@@ -103,3 +105,22 @@ func (h *AdminUserHandler) UpdateUserStatus(c *gin.Context) {
 
 	response.Success(c, userDetail)
 }
+
+// GetUserDevices 获取用户设备列表（含 registration_id）
+// GET /api/v1/admin/users/:id/devices
+// 供后台查询目标用户各设备的 JPush RegistrationID（push_token），用于排查推送问题或手动推送测试。
+func (h *AdminUserHandler) GetUserDevices(c *gin.Context) {
+	userID := c.Param("id")
+	if userID == "" {
+		response.BadRequest(c, "user id is required")
+		return
+	}
+
+	devices, err := h.pushService.GetUserDevices(c.Request.Context(), userID)
+	if err != nil {
+		response.InternalServerError(c, "failed to get user devices")
+		return
+	}
+
+	response.Success(c, dto.DeviceTokensToAdminResponse(devices))
+}