test: add component tests

tests/unit/components/image/ImageManager.test.ts

@@ -0,0 +1,37 @@
+import ImageManager from "$components/image/ImageManager.svelte";
+import { render, screen } from "@testing-library/svelte";
+import { describe, expect, it } from "vitest";
+
+describe("ImageManager.svelte", () => {
+  it("should render with card title", () => {
+    render(ImageManager);
+    expect(screen.getByText("Фоновое изображение")).toBeInTheDocument();
+  });
+
+  it("should render upload button", () => {
+    render(ImageManager);
+    expect(screen.getByText("Загрузить")).toBeInTheDocument();
+  });
+
+  it("should render edit button", () => {
+    render(ImageManager);
+    expect(screen.getByText("Редактировать")).toBeInTheDocument();
+  });
+
+  it("should render reset button", () => {
+    render(ImageManager);
+    expect(screen.getByText("Сбросить")).toBeInTheDocument();
+  });
+
+  it("should render brightness and contrast sliders", () => {
+    render(ImageManager);
+    expect(screen.getByText("Яркость")).toBeInTheDocument();
+    expect(screen.getByText("Контраст")).toBeInTheDocument();
+  });
+
+  it("should have crop-editor layout", () => {
+    render(ImageManager);
+    const editor = document.querySelector(".crop-editor");
+    expect(editor).toBeInTheDocument();
+  });
+});