Resolve "lint, test and build for frontend image"

frontend/src/helpers/strings.test.ts

@@ -0,0 +1,14 @@
+import { expect, test } from "vitest";
+import { onlyWhitespace } from "@/helpers/strings.ts";
+
+test("contains No whitespace", () => {
+  expect(onlyWhitespace("awdawdawd")).toBe(false);
+});
+
+test("contains whitespace", () => {
+  expect(onlyWhitespace("aw daw dawd")).toBe(false);
+});
+
+test("contains only whitespace", () => {
+  expect(onlyWhitespace("  ")).toBe(true);
+});