feat(push): add JPush integration for offline message push

Add JPush (极光推送) integration to enable push notifications for offline users. This includes:
- New jpush client package with API for batch push notifications
- Configuration for jpush (enabled, app_key, master_secret, production mode)
- Updated push service to send messages via JPush when users are offline
- Added PushChatMessage method with do-not-disturb checking
- Integrated push service with chat service to notify offline users of new messages
- Updated deployment workflow with JPush and related environment variables

internal/handler/push_handler.go

@@ -85,12 +85,13 @@ func (h *PushHandler) GetMyDevices(c *gin.Context) {
 		return
 	}
 
-	// 这里需要从DeviceTokenRepository获取设备列表
-	// 由于PushService接口没有提供获取设备列表的方法，我们暂时返回空列表
-	// TODO: 在PushService接口中添加GetUserDevices方法
-	_ = userID // 避免未使用变量警告
+	devices, err := h.pushService.GetUserDevices(c.Request.Context(), userID)
+	if err != nil {
+		response.InternalServerError(c, "failed to get devices")
+		return
+	}
 
-	response.Success(c, []*dto.DeviceTokenResponse{})
+	response.Success(c, dto.DeviceTokensToResponse(devices))
 }
 
 // GetPushRecords 获取推送记录
@@ -140,7 +141,7 @@ func (h *PushHandler) UpdateDeviceToken(c *gin.Context) {
 	}
 
 	var req struct {
-		PushToken string `json:"push_token" binding:"required"`
+		PushToken string `json:"push_token"` 
 	}
 	if err := c.ShouldBindJSON(&req); err != nil {
 		response.BadRequest(c, err.Error())