rect file selection

frontend/utils/rect.ts

@@ -0,0 +1,11 @@
+export function intersectRect(
+    a: { x: number; y: number; width: number; height: number },
+    b: { x: number; y: number; width: number; height: number }
+): boolean {
+    return !(
+        b.x > a.x + a.width ||
+        b.x + b.width < a.x ||
+        b.y > a.y + a.height ||
+        b.y + b.height < a.y
+    );
+}