Use efficient filters

frontend/sync-client/src/utils/remove-from-array.ts

@@ -0,0 +1,17 @@
+/**
+ * Efficiently removes a specific item from an array by modifying it in place.
+ * This is more efficient than using `.filter(item => item !== toRemove)` as it avoids creating a new array
+ *
+ * @param array The array to modify
+ * @param item The item to remove
+ * @returns true if the item was found and removed, false otherwise
+ */
+export function removeFromArray<T>(array: T[], item: T): boolean {
+    const index = array.indexOf(item);
+    if (index !== -1) {
+        // eslint-disable-next-line no-restricted-syntax -- This is the implementation of the helper itself
+        array.splice(index, 1);
+        return true;
+    }
+    return false;
+}