Security fixes

Co-Authored-By: dakkar <dakkar@thenautilus.net>

packages/frontend-shared/js/math.ts

@@ -0,0 +1,10 @@
+/*
+ * SPDX-FileCopyrightText: dakkar and other Sharkey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export function clamp(value: number, min: number, max: number) {
+	if (value > max) return max;
+	if (value < min) return min;
+	return value;
+}