fix(storage): 本地写入口拒绝 Alist 虚拟路径,补字幕在 Alist 库根上明确失败

虚拟前缀 /@alist/… 读到本地是 ENOENT,但 mkdir -p、复制 / 移动目标、写文件、回收站落点会在本机真建出
/@alist 并写入文件。统一守卫:任何本地写类操作参数是虚拟路径即抛 REMOTE_PATH_ON_LOCAL_FS
(remote_path_on_local_fs),不落盘。

- adapters:fs/remote-guard.ts,接在 runFsOp、FsProxy.run(父进程拒绝不起子进程)、copyWithVerify、
  crossDeviceMove、moveSafe、commitNoClobber、sweepStalePartials、writeRootSentinel
- server:storage/local-fs.ts 带守卫的写函数,整理 / 替换 / 刮削 / 回收站 / 上传 / 字幕 / vfs 本地分支改用它
- 补字幕目标在 Alist 媒体库上返回失败原因,撤销同样拒绝

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Cxwgnn2pbzQ7rXv3rq7fei

apps/server/src/storage/local-fs.ts

@@ -0,0 +1,61 @@
+import * as fsp from "node:fs/promises";
+import { assertLocalPaths } from "@umt/adapters";
+
+// 本地写入口的远端路径守卫(server 侧):整理 / 刮削 / 字幕 / 回收站 / 上传里直接调 node:fs 写文件的地方都从这里取函数。
+// 参数是 Alist 虚拟路径(/@alist/…)就抛 FsError("REMOTE_PATH_ON_LOCAL_FS"),不在本机建出 /@alist 目录或写进文件。
+// 读类函数(stat / readdir / readFile …)原样转出:对虚拟路径只会 ENOENT。
+
+export * from "node:fs/promises";
+
+type P = Parameters<typeof fsp.mkdir>[0];
+const s = (p: unknown) => (typeof p === "string" ? p : p instanceof URL ? p.pathname : undefined);
+
+export const mkdir: typeof fsp.mkdir = (async (p: P, o?: Parameters<typeof fsp.mkdir>[1]) => {
+  assertLocalPaths("mkdir", s(p));
+  return fsp.mkdir(p, o);
+}) as typeof fsp.mkdir;
+
+export const writeFile: typeof fsp.writeFile = async (p, data, o) => {
+  assertLocalPaths("writeFile", s(p));
+  return fsp.writeFile(p, data, o);
+};
+
+export const rename: typeof fsp.rename = async (a, b) => {
+  assertLocalPaths("rename", s(a), s(b));
+  return fsp.rename(a, b);
+};
+
+export const copyFile: typeof fsp.copyFile = async (a, b, mode) => {
+  assertLocalPaths("copyFile", s(a), s(b));
+  return fsp.copyFile(a, b, mode);
+};
+
+export const rm: typeof fsp.rm = async (p, o) => {
+  assertLocalPaths("rm", s(p));
+  return fsp.rm(p, o);
+};
+
+export const rmdir: typeof fsp.rmdir = async (p, o) => {
+  assertLocalPaths("rmdir", s(p));
+  return fsp.rmdir(p, o);
+};
+
+export const unlink: typeof fsp.unlink = async (p) => {
+  assertLocalPaths("unlink", s(p));
+  return fsp.unlink(p);
+};
+
+export const link: typeof fsp.link = async (a, b) => {
+  assertLocalPaths("link", s(a), s(b));
+  return fsp.link(a, b);
+};
+
+/** open:写 / 追加 / 新建模式才拦;只读打开放行(虚拟路径只会 ENOENT) */
+export const open: typeof fsp.open = (async (
+  p: Parameters<typeof fsp.open>[0],
+  flags?: string | number,
+  mode?: number,
+) => {
+  if (flags !== undefined && flags !== "r") assertLocalPaths("open", s(p));
+  return fsp.open(p, flags, mode);
+}) as typeof fsp.open;

apps/server/src/storage/transfer.ts

@@ -1,7 +1,7 @@
 import { randomUUID } from "node:crypto";
-import { mkdir, rename, rm, stat, unlink } from "node:fs/promises";
 import { basename, dirname, join, posix } from "node:path";
 import { AlistError, type ProgressCallback } from "@umt/adapters";
+import { mkdir, rename, rm, stat, unlink } from "./local-fs.ts";
 import { invalidateRemote, relayDir, remote, remoteError } from "./vfs.ts";
 import { parseVPath, sameStorage } from "./vpath.ts";
 

apps/server/src/storage/vfs.ts

@@ -1,5 +1,4 @@
 import { createHash, randomUUID } from "node:crypto";
-import { lstat, mkdir, readdir, readFile, realpath, rename, rm, writeFile } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import { basename, dirname, join, posix } from "node:path";
 import {
@@ -12,6 +11,7 @@ import {
   type StatResult,
   statSafe,
 } from "@umt/adapters";
+import { lstat, mkdir, readdir, readFile, realpath, rename, rm, writeFile } from "./local-fs.ts";
 import { storageDataDir, storageEntry } from "./registry.ts";
 import { parseVPath, toVPath, type VPath } from "./vpath.ts";