created tracker api endpoint and created UI interface for trackers

server/internal/middleware/access.go

@@ -35,3 +35,32 @@ func DeviceAccessFilter() gin.HandlerFunc {
 		c.Next()
 	}
 }
+
+// TrackerAccessFilter middleware sets filtering context for tracker access
+func TrackerAccessFilter() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		userContext, exists := c.Get("user")
+		if !exists {
+			c.JSON(401, gin.H{"error": "unauthorized"})
+			c.Abort()
+			return
+		}
+
+		user, ok := userContext.(handlers.UserContext)
+		if !ok {
+			c.JSON(401, gin.H{"error": "invalid user data"})
+			c.Abort()
+			return
+		}
+
+		// Set filter flag and user ID in context (mirrors devices)
+		if user.Role == models.RoleAdmin {
+			c.Set("filterTrackers", false) // Admin sees all trackers
+		} else {
+			c.Set("filterTrackers", true) // Regular user needs filtering
+			c.Set("userID", user.ID)      // Store user ID for filtering (same key as devices)
+		}
+
+		c.Next()
+	}
+}