前端增加3：4选择

tests/create-studio-template-interaction.test.ts

@@ -4,6 +4,13 @@ import { describe, expect, it } from "vitest";
 const createStudioUrl = new URL("../components/create-studio.tsx", import.meta.url);
 
 describe("create studio template interaction", () => {
+  it("offers the shared 3:4 portrait preset in creation and template settings", async () => {
+    const source = await readFile(createStudioUrl, "utf8");
+
+    expect(source).toContain('{ label: "3:4", width: 1728, height: 2304 }');
+    expect(source.match(/imageSizePresets\.map/g)?.length || 0).toBeGreaterThanOrEqual(2);
+  });
+
   it("applies and clears templates without changing the selected creation mode", async () => {
     const source = await readFile(createStudioUrl, "utf8");
     const clearSelection = functionSource(source, "clearImageTemplateSelection", "applyTemplateToConsole");