fix: 修复桌面字体转换依赖启动崩溃

apps/desktop/tests/release-build.test.ts

@@ -92,6 +92,23 @@ describe("桌面发行构建链", () => {
     expect(buildScript).toContain("dist/docx-media-filter.lua");
   });
 
+  it("为 ESM 主进程中的 CommonJS 字体转换依赖保留 __dirname", () => {
+    const buildScript = readFileSync(
+      `${desktopRoot}/scripts/build-main.mjs`,
+      "utf8"
+    );
+
+    expect(buildScript).toContain(
+      'dirname as __mdToPdfDirname'
+    );
+    expect(buildScript).toContain(
+      'fileURLToPath as __mdToPdfFileURLToPath'
+    );
+    expect(buildScript).toContain(
+      "const __dirname = __mdToPdfDirname(__mdToPdfFileURLToPath(import.meta.url));"
+    );
+  });
+
   it("在 Docker Web 构建前复制样例并保留到运行镜像", () => {
     const dockerfile = readFileSync(
       `${projectRoot}/deploy/Dockerfile`,