chenged display of devices according to user`s role. all changes are made in backend

server/internal/handlers/devices.go

@@ -26,12 +26,52 @@ func (h *DevicesHandler) List(c *gin.Context) {
 		limit = 50
 	}
 
-	var total int64
-	h.db.Model(&models.Device{}).Count(&total)
+	// Get user context
+	userContext, exists := c.Get("user")
+	if !exists {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "unauthorized"})
+		return
+	}
 
+	user, ok := userContext.(UserContext)
+	if !ok {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "invalid user data"})
+		return
+	}
+
+	var total int64
 	var devs []models.Device
-	if err := h.db.Preload("Users").Offset(offset).Limit(limit).Find(&devs).Error; err != nil {
-		c.JSON(http.StatusInternalServerError, gin.H{"error": "query failed"})
+	var err error
+
+	if user.Role == models.RoleAdmin {
+		// Admin user - show all devices
+		err = h.db.Model(&models.Device{}).Count(&total).Error
+		if err != nil {
+			c.JSON(http.StatusInternalServerError, gin.H{"error": "count query failed: " + err.Error()})
+			return
+		}
+
+		err = h.db.Preload("Users").Offset(offset).Limit(limit).Find(&devs).Error
+	} else {
+		err = h.db.Model(&models.Device{}).
+			Joins("INNER JOIN user_devices ON user_devices.id = devices.guid").
+			Where("user_devices.guid = ?", user.ID).
+			Count(&total).Error
+
+		if err != nil {
+			c.JSON(http.StatusInternalServerError, gin.H{"error": "count query failed: " + err.Error()})
+			return
+		}
+
+		err = h.db.Preload("Users").
+			Joins("INNER JOIN user_devices ON user_devices.id = devices.guid").
+			Where("user_devices.guid = ?", user.ID).
+			Offset(offset).Limit(limit).
+			Find(&devs).Error
+	}
+
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "query failed: " + err.Error()})
 		return
 	}
 
@@ -39,6 +79,7 @@ func (h *DevicesHandler) List(c *gin.Context) {
 	for _, d := range devs {
 		out = append(out, dto.MapDevice(d))
 	}
+
 	c.JSON(http.StatusOK, dto.DeviceListDto{Devices: out, Offset: offset, Limit: limit, Total: total})
 }