섹션 레이아웃 및 템플릿 스타일 개선

tests/unit/SectionLayoutPresets.spec.tsx

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+import { describe, it, expect, vi } from "vitest";
+import { render, screen, fireEvent } from "@testing-library/react";
+import type { SectionBlockProps } from "@/features/editor/state/editorStore";
+import { SectionPropertiesPanel } from "@/app/editor/panels/SectionPropertiesPanel";
+
+// 섹션 레이아웃 프리셋/직접 입력이 columns 배열의 span 값을 올바르게 업데이트하는지 검증한다.
+describe("SectionPropertiesPanel - layout presets", () => {
+  const baseProps: SectionBlockProps = {
+    background: "default",
+    paddingY: "md",
+    columns: [{ id: "col-1", span: 12 }],
+    maxWidthMode: "normal",
+    gapX: "md",
+  };
+
+  it("2열 1/2-1/2 프리셋 선택 시 columns 가 [6,6] 분할로 업데이트된다", () => {
+    const updateBlock = vi.fn();
+
+    render(
+      <SectionPropertiesPanel
+        sectionProps={baseProps}
+        selectedBlockId="section-layout-1"
+        updateBlock={updateBlock}
+      />,
+    );
+
+    const select = screen.getByLabelText("섹션 컬럼 레이아웃");
+
+    fireEvent.change(select, { target: { value: "two-equal" } });
+
+    expect(updateBlock).toHaveBeenCalledWith(
+      "section-layout-1",
+      expect.objectContaining({
+        columns: expect.arrayContaining([
+          expect.objectContaining({ span: 6 }),
+          expect.objectContaining({ span: 6 }),
+        ]),
+      }),
+    );
+  });
+
+  it("컬럼 span 직접 입력 시 해당 컬럼 span 값이 업데이트된다", () => {
+    const updateBlock = vi.fn();
+
+    render(
+      <SectionPropertiesPanel
+        sectionProps={baseProps}
+        selectedBlockId="section-layout-2"
+        updateBlock={updateBlock}
+      />,
+    );
+
+    const input = screen.getByLabelText("1열 폭 (1~12)");
+
+    fireEvent.change(input, { target: { value: "8" } });
+
+    expect(updateBlock).toHaveBeenCalledWith(
+      "section-layout-2",
+      expect.objectContaining({
+        columns: expect.arrayContaining([
+          expect.objectContaining({ span: 8 }),
+        ]),
+      }),
+    );
+  });
+});