fix: 修复所有 TypeScript 类型错误

- 修复 fonteditor-core 模块声明（添加 FontEditor 命名空间、FontType 类型、SubsetOptions 接口）
- 修复 llrt.ts 中 mkdir 和 rm 方法的返回类型问题
- 修复 tcp_server.ts 中 chunk 类型问题（添加 Buffer 类型检查和转换）
- 修复 font_detail.ts 中缺失的 ORIGIN 导入
- 修复 subset.ts 中 subsetQueueTimeoutSeconds 的导入
- 为 Font 类添加 optimize() 和 write() 方法声明

backend/app.ts

@@ -76,7 +76,7 @@ const staticFileMiddleware: cMiddleware = async function (req, _res, next) {
       }
       const fileContent = await readFile(resolvedPath);
       const extname = resolvedPath.split(".").pop() ?? "";
-      newRes = new Response(fileContent, {
+      newRes = new Response(fileContent as unknown as BodyInit, {
         status: 200,
         headers: {
           "Content-Type": mimeTypes[extname] || "application/octet-stream",
@@ -109,7 +109,7 @@ const staticFileMiddleware: cMiddleware = async function (req, _res, next) {
         });
       } else {
         const fallbackContent = await readFile(path_join(ROOT_DIR, "index.html"));
-        newRes = new Response(fallbackContent, {
+        newRes = new Response(fallbackContent as unknown as BodyInit, {
           status: 200,
           headers: {
             "Content-Type": "text/html; charset=utf-8",

backend/font_util/cff-subset.ts

@@ -183,7 +183,7 @@ function encodeDictInt(v: number): number[] {
 
 /** Type 2 charstring 操作码（Adobe Type 2 Charstring Format）。 */
 const T2_CALLSUBR = 10;
-const T2_RETURN = 11;
+// const T2_RETURN = 11; // 未使用，保留注释
 const T2_ENDCHAR = 14;
 const T2_HSTEM = 1;
 const T2_VSTEM = 3;

backend/interface.ts

@@ -1,5 +1,6 @@
 export let stat: (path: string) => Promise<{
   isFile: () => boolean;
+  isDirectory: () => boolean;
   size: number;
   /** 最后修改时间戳（毫秒），用于文件变更检测 */
   mtimeMs: number;
@@ -18,6 +19,8 @@ export let mkdir: (path: string) => Promise<void>;
 
 export let unlink: (path: string) => Promise<void>;
 
+export let rm: (path: string) => Promise<void>;
+
 /** LLRT 专用：保存 rm 函数引用，避免闭包问题 */
 let llrtRm: ((path: string) => Promise<void>) | undefined;
 
@@ -28,8 +31,7 @@ export const implInterface = (options: {
   readdir: typeof readdir;
   mkdir: typeof mkdir;
   unlink?: typeof unlink;
-  /** LLRT 没有 unlink，提供 rm 作为替代 */
-  rm?: (path: string) => Promise<void>;
+  rm?: typeof rm;
 }) => {
   stat = options.stat;
   readFile = options.readFile;
@@ -46,6 +48,12 @@ export const implInterface = (options: {
       await llrtRm(path);
     }
   };
+  /** 同时暴露 rm 方法 */
+  rm = async (path) => {
+    if (options.rm) {
+      await options.rm(path);
+    }
+  };
 };
 
 export function path_join(...paths: string[]) {

backend/routes/font_detail.ts

@@ -11,7 +11,7 @@
 import { readFile, stat } from "../interface";
 import { path_join } from "../interface";
 import { fontDirs } from "../config";
-import { FONT_NAME, FONT_SLUG, type PlaceholderValues } from "../../src/placeholders";
+import { FONT_NAME, FONT_SLUG, ORIGIN, type PlaceholderValues } from "../../src/placeholders";
 
 const ROOT_DIR = "dist";
 
@@ -69,6 +69,7 @@ export async function handleFontDetail(pathname: string): Promise<Response | nul
   const values: PlaceholderValues = {
     [FONT_NAME]: slug,
     [FONT_SLUG]: slug,
+    [ORIGIN]: "",
   };
 
   /** 解码模板为字符串，替换所有占位符 */

backend/routes/subset.ts

@@ -3,7 +3,7 @@ import type { FontEditor } from "../../vendor/fonteditor-core/lib/ttf/font.js";
 import { parseUrl, stats, subsetCache, findFontPath, readFontBuffer, markStatsDirty } from "../shared";
 import { markFontUsed } from "../temp_cleaner";
 import { withMemoryGate } from "../subset_queue";
-import { subsetConcurrency, subsetQueueTimeoutSeconds } from "../config";
+import { subsetQueueTimeoutSeconds } from "../config";
 
 /**
  * 进程启动时戳（模块加载时取一次，进程重启即变化）
@@ -142,13 +142,13 @@ export async function handleFontSubset(req: Request, res: Response) {
   const t3 = Date.now();
 
   /** 写入裁剪结果缓存 */
-  subsetCache.set(cacheKey, newFont as ArrayBuffer);
+  subsetCache.set(cacheKey, newFont as unknown as ArrayBuffer);
 
   const contentTypes: Record<string, string> = { ttf: "font/ttf", woff2: "font/woff2" };
 
   return {
     req,
-    res: new Response(newFont, {
+    res: new Response(newFont as unknown as BodyInit, {
       status: 200,
       headers: {
         "Content-Type": contentTypes[outType] || "font/ttf",

backend/server/llrt.ts

@@ -17,11 +17,15 @@ implInterface({
     return Promise.all(
       names.map(async (name) => {
         const s = await fs.stat(`${path}/${name}`);
-        return { name, isFile: () => s.isFile() };
+        return { name, isFile: () => s.isFile(), isDirectory: () => s.isDirectory() };
       })
     );
   },
-  mkdir: (path) => fs.mkdir(path, { recursive: true }),
-  /** LLRT 没有 unlink，用箭头函数包装 rm 避免 this 问题 */
-  rm: (path: string) => fs.rm(path),
+  mkdir: async (path) => {
+    await fs.mkdir(path, { recursive: true });
+  },
+  /** LLRT 没有 unlink，用 rm 代替，忽略返回值 */
+  rm: async (path: string) => {
+    await fs.rm(path);
+  },
 });

backend/server/node.ts

@@ -1,10 +1,10 @@
 import { implInterface } from "../interface";
-import { stat as fsStat, readFile, writeFile, readdir as fsReaddir, mkdir, unlink } from "fs/promises";
+import { stat as fsStat, readFile, writeFile, readdir as fsReaddir, mkdir, unlink, rm } from "fs/promises";
 
 implInterface({
   async stat(path) {
     const r = await fsStat(path);
-    return r;
+    return { ...r, isDirectory: () => r.isDirectory() };
   },
   readFile(path) {
     return readFile(path);
@@ -21,11 +21,11 @@ implInterface({
    */
   async readdir(path) {
     const names = await fsReaddir(path);
-    const results: { isFile: () => boolean; name: string }[] = [];
+    const results: { isFile: () => boolean; isDirectory: () => boolean; name: string }[] = [];
     for (const name of names) {
       try {
         const s = await fsStat(path + "/" + name);
-        results.push({ name, isFile: () => s.isFile() });
+        results.push({ name, isFile: () => s.isFile(), isDirectory: () => s.isDirectory() });
       } catch {
         /** stat 失败（符号链接断裂等）跳过 */
       }
@@ -38,4 +38,7 @@ implInterface({
   unlink(path) {
     return unlink(path);
   },
+  rm(path) {
+    return rm(path);
+  },
 });

backend/server/tcp_server.ts

@@ -11,7 +11,7 @@ export function createTcpServer(
   const server = createServer((socket) => {
     const readable = new ReadableStream<Uint8Array>({
       start(controller) {
-        socket.on("data", (chunk) => {
+        socket.on("data", (chunk: Buffer) => {
           controller.enqueue(new Uint8Array(chunk));
         });
         socket.on("error", (err) => {
@@ -29,8 +29,9 @@ export function createTcpServer(
     // 创建 WritableStream
     const writable = new WritableStream<Uint8Array>({
       write(chunk) {
-        return new Promise((resolve, reject) => {
-          socket.write(chunk, (err) => {
+        return new Promise<void>((resolve, reject) => {
+          const buffer = Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk);
+          socket.write(buffer, (err) => {
             if (err) reject(err);
             else resolve();
           });

vendor/fonteditor-core/lib/ttf/font.d.ts

@@ -0,0 +1,31 @@
+/**
+ * fonteditor-core 类型声明
+ */
+
+export namespace FontEditor {
+  export type FontType = "ttf" | "otf" | "woff" | "woff2" | "eot" | "svg";
+  
+  export interface SubsetOptions {
+    type?: string;
+    subset?: number[];
+    kerning?: boolean;
+    extraSubsetGids?: number[];
+    presetCmap?: Record<number, number>;
+  }
+}
+
+export interface FontEditor {
+  /** 字体编辑器接口 */
+}
+
+export function createFontEditor(data: ArrayBuffer): FontEditor;
+
+export class Font {
+  static create(buffer: ArrayBuffer | Buffer | string | Document, options?: FontEditor.SubsetOptions): Font;
+  
+  get(): any;
+  set(data: any): Font;
+  export(options?: { type?: string }): ArrayBuffer;
+  optimize(options?: any): Font;
+  write(options?: any): ArrayBuffer;
+}