优化第一阶段

lib/plugins/gltf/config.js

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+import { listGltfFiles } from "../../utils/gltf.js";
+
+const extensionStep = {
+  name: "扩展选项",
+  type: "multiselect",
+  message: "请选择要添加的glTF扩展",
+  options: [
+    { value: "textureBasisu", label: "KHR_texture_basisu（纹理自动扩展）", hint: "自动添加KTX2纹理扩展支持" },
+    { value: "placeholder1", label: "预留选项1", hint: "功能开发中..." },
+    { value: "placeholder2", label: "预留选项2", hint: "功能开发中..." },
+    { value: "placeholder3", label: "预留选项3", hint: "功能开发中..." }
+  ],
+  default: ["textureBasisu"]
+};
+
+export function getSteps() {
+  const files = listGltfFiles();
+  const fileStep = {
+    name: "文件选择",
+    type: "multiselect",
+    message: files.length ? "请选择要处理的glTF文件" : "当前目录未找到glTF文件",
+    options: files.map(file => ({ value: file, label: file })),
+    default: [...files]
+  };
+
+  return [fileStep, extensionStep];
+}

lib/plugins/gltf/index.js

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+import fs from "fs";
+import path from "path";
+import color from "picocolors";
+import { checkRequiredFiles, modifyGltfContent, listGltfFiles, BACKUP_SUFFIX } from "../../utils/gltf.js";
+import { runInteractive, showSummary } from "./ui.js";
+import { stopKeypress, waitForKey } from "../../keyboard.js";
+
+export function runGltfExtension(config = { files: [], extensions: ["textureBasisu"] }) {
+  const cwd = process.cwd();
+  const { files = [], extensions = ["textureBasisu"] } = config;
+  const selectedExtensions = extensions.length ? extensions : ["textureBasisu"];
+
+  const { ok, missing } = checkRequiredFiles();
+  if (!ok) {
+    console.log(color.red("\n✖ 缺少必要文件: " + missing.join(", ")));
+    console.log(color.dim("请确保当前目录包含 .ktx2、.gltf 和 .bin 文件\n"));
+    return { success: false, count: 0 };
+  }
+
+  const fallbackFiles = listGltfFiles();
+  const gltfFiles = (files.length ? files : fallbackFiles).filter(f => f.toLowerCase().endsWith(".gltf"));
+  if (!gltfFiles.length) {
+    console.log(color.yellow("未选择可处理的 glTF 文件"));
+    return { success: false, count: 0 };
+  }
+
+  let count = 0;
+
+  for (const file of gltfFiles) {
+    const fullPath = path.join(cwd, file);
+    if (!fs.existsSync(fullPath)) {
+      console.log(color.yellow("跳过缺失的文件: " + file));
+      continue;
+    }
+    const baseName = file.replace(/\.gltf$/i, "");
+    const backupName = baseName + BACKUP_SUFFIX + ".gltf";
+    const backupPath = path.join(cwd, backupName);
+
+    fs.copyFileSync(fullPath, backupPath);
+    const modified = modifyGltfContent(fullPath, selectedExtensions);
+    fs.writeFileSync(fullPath, JSON.stringify(modified, null, 2), "utf-8");
+    console.log(color.green("✓ " + file + " (备份: " + backupName + ")"));
+    count++;
+  }
+
+  return { success: count > 0, count };
+}
+
+async function run() {
+  const result = await runInteractive();
+  if (!result) return "back";
+
+  stopKeypress();
+
+  const { results } = result;
+  const config = {
+    files: results[0] || [],
+    extensions: results[1] || []
+  };
+
+  showSummary([
+    "处理文件: " + (config.files.length ? config.files.join(", ") : "未选择"),
+    "扩展选项: " + (config.extensions.length ? config.extensions.join(", ") : "未选择")
+  ]);
+
+  const { success, count } = runGltfExtension(config);
+  if (success) {
+    console.log(color.green("\n✓ 已修改 " + count + " 个 glTF 文件"));
+  }
+
+  await waitForKey();
+  return "back";
+}
+
+export default {
+  id: "gltf",
+  name: "glTF扩展",
+  desc: "添加KTX2纹理扩展",
+  run,
+};

lib/plugins/gltf/ui.js

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+import { createStepUI } from "../../utils/stepui.js";
+import { getSteps } from "./config.js";
+
+const ui = createStepUI({
+  title: "glTF 扩展工具",
+  getSteps
+});
+
+export const { runInteractive, showSummary } = ui;