优化第一阶段

lib/plugins/ktx2/config.js

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+// 步骤配置
+export const steps = [
+  {
+    name: "文件格式",
+    type: "multiselect",
+    message: "请选择要压缩的图片类型",
+    options: [
+      { value: "png", label: "PNG (.png)（无损格式，适合图标和透明图）" },
+      { value: "jpg", label: "JPG (.jpg)（有损格式，适合照片和复杂图像）" },
+      { value: "jpeg", label: "JPEG (.jpeg)（同JPG，仅扩展名不同）" },
+      { value: "webp", label: "WebP (.webp)（新一代格式，体积更小）" },
+      { value: "tga", label: "TGA (.tga)（游戏纹理常用格式）" }
+    ],
+    default: ["png", "jpg"]
+  },
+  {
+    name: "压缩程度",
+    type: "select",
+    message: "请选择压缩级别",
+    options: [
+      { value: "none", label: "无压缩（原始质量）", hint: "保持原始文件大小，图片和内容无损" },
+      { value: "standard", label: "标准压缩（推荐）", hint: "平衡文件大小与质量，压缩率约40%" },
+      { value: "high", label: "高度压缩（最小体积）", hint: "最大程度减小文件体积，可能轻微影响清晰度" },
+      { value: "extreme", label: "极限压缩（极致压缩）", hint: "牺牲部分质量换取最小体积，适合网络传输" }
+    ],
+    default: "standard"
+  },
+  {
+    name: "编码格式",
+    type: "select",
+    message: "请选择编码格式",
+    options: [
+      { value: "uastc", label: "UASTC（通用超压缩纹理）", hint: "高质量GPU纹理，解码快，适合实时渲染" },
+      { value: "etc1s", label: "ETC1S（基础压缩纹理）", hint: "文件体积最小，兼容性好，适合移动端" },
+      { value: "astc", label: "ASTC（自适应纹理压缩）", hint: "灵活块大小，质量与体积可调，适合高端设备" }
+    ],
+    default: "uastc"
+  },
+  {
+    name: "Mipmap",
+    type: "select",
+    message: "请选择Mipmap生成方式",
+    options: [
+      { value: "auto", label: "自动生成（推荐）", hint: "根据图片尺寸自动生成多级纹理，优化远距离渲染" },
+      { value: "none", label: "不生成Mipmap", hint: "仅保留原始尺寸，文件更小但可能出现锯齿" },
+      { value: "custom", label: "自定义层级", hint: "手动指定Mipmap层数，精细控制纹理细节" }
+    ],
+    default: "auto"
+  },
+  {
+    name: "输出选项",
+    type: "multiselect",
+    message: "请选择输出选项",
+    options: [
+      { value: "overwrite", label: "覆盖已存在文件（自动替换同名文件）" },
+      { value: "keepOriginal", label: "保留原文件（压缩后不删除源文件）" },
+      { value: "report", label: "生成压缩报告（输出详细的压缩统计信息）" },
+      { value: "silent", label: "静默模式（减少控制台输出信息）" },
+      { value: "gltfExtension", label: "修改glTF扩展（添加KHR_texture_basisu）", dynamic: true }
+    ],
+    default: ["overwrite", "keepOriginal"]
+  }
+];