feat: add flexible character uploads and video asset library

tests/normalize.test.mjs

@@ -32,3 +32,14 @@ test("生成时长提供 5 到 14 秒全部整数选项", () => {
   const values = [...durationSelect.matchAll(/<option value="(\d+)">/g)].map((match) => Number(match[1]));
   assert.deepEqual(values, [5, 6, 7, 8, 9, 10, 11, 12, 13, 14]);
 });
+
+test("人物素材支持任选 1 到 3 张，且提供独立视频素材库", () => {
+  const html = readFileSync(new URL("../public/index.html", import.meta.url), "utf8");
+  assert.match(html, /data-module="video-library"/);
+  assert.match(html, /id="videoAssetForm"/);
+  for (const id of ["assetFrontUrl", "assetSideUrl", "assetBackUrl"]) {
+    const input = html.match(new RegExp(`<input id="${id}"[^>]*>`))?.[0] || "";
+    assert.ok(input, `缺少 ${id}`);
+    assert.doesNotMatch(input, /\srequired(?:\s|>)/);
+  }
+});