test: reuse video dimensions imports

src/media/video-dimensions.test.ts

@@ -1,4 +1,5 @@
 import { describe, expect, it, vi } from "vitest";
+import { parseFfprobeVideoDimensions, probeVideoDimensions } from "./video-dimensions.js";
 
 const { runFfprobe } = vi.hoisted(() => ({
   runFfprobe: vi.fn(),
@@ -8,8 +9,6 @@ vi.mock("./ffmpeg-exec.js", () => ({
   runFfprobe,
 }));
 
-const { parseFfprobeVideoDimensions, probeVideoDimensions } = await import("./video-dimensions.js");
-
 describe("parseFfprobeVideoDimensions", () => {
   it("returns positive integer dimensions from ffprobe JSON", () => {
     expect(