diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 83cd314..803768c 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -31,6 +31,11 @@ jobs:
       - name: Build application
         run: yarn build
 
+      - name: Install sharp platform binaries
+        run: |
+          npm install --os=win32 --cpu=x64 sharp
+          npm install --os=win32 --cpu=arm64 sharp
+
       - name: Build Windows installer
         run: yarn dist:win
         env:
@@ -63,6 +68,11 @@ jobs:
       - name: Build application
         run: yarn build
 
+      - name: Install sharp platform binaries
+        run: |
+          npm install --os=darwin --cpu=x64 sharp
+          npm install --os=darwin --cpu=arm64 sharp
+
       - name: Build macOS installer
         run: yarn dist:mac
         env:
@@ -95,6 +105,11 @@ jobs:
       - name: Build application
         run: yarn build
 
+      - name: Install sharp platform binaries
+        run: |
+          npm install --os=linux --cpu=x64 sharp
+          npm install --os=linux --cpu=arm64 sharp
+
       - name: Build Linux installer
         run: yarn dist:linux
         env:
diff --git a/electron-builder.yml b/electron-builder.yml
index 66d87d0..9f2cb9b 100644
--- a/electron-builder.yml
+++ b/electron-builder.yml
@@ -21,6 +21,9 @@ files:
   - "!scripts/*.ts"
 
 asar: true
+asarUnpack:
+  - "**/node_modules/sharp/**"
+  - "**/node_modules/@img/**"
 
 extraResources:
   - from: data
diff --git a/env/.env.dev b/env/.env.dev
deleted file mode 100644
index 584000d..0000000
--- a/env/.env.dev
+++ /dev/null
@@ -1,4 +0,0 @@
-NODE_ENV=dev
-PORT=10588
-OSSURL=http://127.0.0.1:10588/
-
diff --git a/env/.env.prod b/env/.env.prod
deleted file mode 100644
index db28ae4..0000000
--- a/env/.env.prod
+++ /dev/null
@@ -1,4 +0,0 @@
-NODE_ENV=prod
-PORT=10588
-OSSURL=http://127.0.0.1:10588/
-
diff --git a/scripts/build.ts b/scripts/build.ts
index 3cd22bf..097d927 100644
--- a/scripts/build.ts
+++ b/scripts/build.ts
@@ -28,6 +28,7 @@ const external = [
   "vm2",
   "sqlite3",
   "better-sqlite3",
+  "sharp",
   "mysql",
   "mysql2",
   "pg",
diff --git a/scripts/main.ts b/scripts/main.ts
index d4472a8..0b63644 100644
--- a/scripts/main.ts
+++ b/scripts/main.ts
@@ -15,20 +15,26 @@ declare const __APP_VERSION__: string | undefined;
 
 function getVersionFromUpdateJson(filePath: string): string | null {
   try {
-    if (fs.existsSync(filePath)) {
-      const data = JSON.parse(fs.readFileSync(filePath, "utf8"));
-      return data.version ?? null;
-    }
+    return JSON.parse(fs.readFileSync(filePath, "utf8")).version ?? null;
   } catch {}
   return null;
 }
 
-function copyDirForce(src: string, dest: string): void {
+const SKIP_ENTRIES = new Set(["logs", "oss", "db2.sqlite"]);
+
+function copyDir(src: string, dest: string, overwrite = false): void {
   if (!fs.existsSync(src)) return;
-  if (fs.existsSync(dest)) {
-    fs.rmSync(dest, { recursive: true, force: true });
+  fs.mkdirSync(dest, { recursive: true });
+  for (const entry of fs.readdirSync(src, { withFileTypes: true })) {
+    if (SKIP_ENTRIES.has(entry.name)) continue;
+    const srcPath = path.join(src, entry.name);
+    const destPath = path.join(dest, entry.name);
+    if (entry.isDirectory()) {
+      copyDir(srcPath, destPath, overwrite);
+    } else if (overwrite || !fs.existsSync(destPath)) {
+      fs.copyFileSync(srcPath, destPath);
+    }
   }
-  copyDirRecursive(src, dest);
 }
 
 function initializeData(): void {
@@ -38,34 +44,23 @@ function initializeData(): void {
   const currentVersion = typeof __APP_VERSION__ !== "undefined" ? __APP_VERSION__ : "0.0.0";
   const userVersion = getVersionFromUpdateJson(updateJsonFile);
 
-  // 首次安装或无update.json，直接全量拷贝
-  if (!fs.existsSync(destDir) || !userVersion) {
-    copyDirRecursive(srcDir, destDir);
+  if (!userVersion) {
+    copyDir(srcDir, destDir);
     return;
   }
 
-  // 版本号不同则覆盖 serve 和 web 目录
   if (userVersion !== currentVersion) {
-    copyDirForce(path.join(srcDir, "serve"), path.join(destDir, "serve"));
-    copyDirForce(path.join(srcDir, "web"), path.join(destDir, "web"));
-  }
-}
-
-function copyDirRecursive(src: string, dest: string): void {
-  if (!fs.existsSync(src)) return;
-  if (!fs.existsSync(dest)) fs.mkdirSync(dest, { recursive: true });
-  for (const entry of fs.readdirSync(src, { withFileTypes: true })) {
-    // 跳过 oss 文件夹和 db2.sqlite 文件
-    if (entry.isDirectory() && entry.name === "logs") continue;
-    if (entry.isDirectory() && entry.name === "oss") continue;
-    if (!entry.isDirectory() && entry.name === "db2.sqlite") continue;
-    const srcPath = path.join(src, entry.name);
-    const destPath = path.join(dest, entry.name);
-    if (entry.isDirectory()) {
-      copyDirRecursive(srcPath, destPath);
-    } else if (!fs.existsSync(destPath)) {
-      fs.copyFileSync(srcPath, destPath);
+    for (const dir of ["serve", "web"]) {
+      const dest = path.join(destDir, dir);
+      if (fs.existsSync(dest)) fs.rmSync(dest, { recursive: true, force: true });
+      copyDir(path.join(srcDir, dir), dest);
     }
+    copyDir(srcDir, destDir);
+    try {
+      const data = JSON.parse(fs.readFileSync(updateJsonFile, "utf8"));
+      data.version = currentVersion;
+      fs.writeFileSync(updateJsonFile, JSON.stringify(data, null, 4), "utf8");
+    } catch {}
   }
 }
 
diff --git a/src/app.ts b/src/app.ts
index 4cb5e0c..48b87f6 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -12,7 +12,6 @@ import fs from "fs";
 import u from "@/utils";
 import jwt from "jsonwebtoken";
 import socketInit from "@/socket/index";
-import path from "path";
 
 const app = express();
 const server = http.createServer(app);
@@ -52,7 +51,7 @@ export default async function startServe(randomPort: Boolean = false) {
     express.static(skillsDir),
   );
 
-    // assets 静态资源
+  // assets 静态资源
   const assetsDir = u.getPath("assets");
   if (!fs.existsSync(assetsDir)) {
     fs.mkdirSync(assetsDir, { recursive: true });
@@ -105,7 +104,7 @@ export default async function startServe(randomPort: Boolean = false) {
     res.status(err.status || 500).send(err);
   });
 
-  const port = randomPort ? 0 : parseInt(process.env.PORT || "10588");
+  const port = randomPort ? 0 : 10588;
   return await new Promise((resolve) => {
     server.listen(port, async () => {
       const address = server.address();
diff --git a/src/env.ts b/src/env.ts
index d1af1b4..db8f322 100644
--- a/src/env.ts
+++ b/src/env.ts
@@ -1,12 +1,3 @@
-import { readFileSync, existsSync, writeFileSync, mkdirSync } from "fs";
-import path from "path";
-
-// 默认环境变量（当 env 文件不存在时自动创建）
-const defaultEnvValues: Record<string, string> = {
-  dev: `NODE_ENV=dev\nPORT=10588\nOSSURL=http://127.0.0.1:10588/oss/`,
-  prod: `NODE_ENV=prod\nPORT=10588\nOSSURL=http://127.0.0.1:10588/oss/`,
-};
-
 // 判断是否为打包后的 Electron 环境
 const isElectron = typeof process.versions?.electron !== "undefined";
 let isPackaged = false;
@@ -16,35 +7,9 @@ if (isElectron) {
 }
 
 //加载环境变量（打包环境默认使用 prod）
-const env = process.env.NODE_ENV ?? (isPackaged ? "prod" : "dev");
+const env = process.env.NODE_ENV;
 if (!env) {
-  console.log("[环境变量为空]");
-  process.exit(1);
-} else {
-  // Electron 打包环境使用 userData 目录，开发环境使用项目根目录
-  let envDir: string;
-  if (isElectron) {
-    const { app } = require("electron");
-    envDir = path.join(app.getPath("userData"), "env");
-  } else {
-    envDir = path.resolve("env");
-  }
-  const envFilePath = path.join(envDir, `.env.${env}`);
-
-  // 自动创建 env 目录和文件（.gitignore 可能忽略了这些文件）
-  if (!existsSync(envDir)) {
-    mkdirSync(envDir, { recursive: true });
-  }
-  if (!existsSync(envFilePath)) {
-    const content = defaultEnvValues[env] ?? defaultEnvValues.prod;
-    writeFileSync(envFilePath, content, "utf8");
-    console.log(`[环境变量] 自动创建 ${envFilePath}`);
-  }
-
-  const text = readFileSync(envFilePath, "utf8");
-  for (const line of text.split("\n")) {
-    const idx = line.indexOf("=");
-    if (idx > 0) process.env[line.slice(0, idx).trim()] = line.slice(idx + 1).trim();
-  }
-  console.log(`[环境变量] ${env}`);
+  if (isElectron) process.env.NODE_ENV = "prod";
+  else process.env.NODE_ENV = "dev";
+  console.log(`[环境变量：${process.env.NODE_ENV}]`);
 }
diff --git a/src/routes/production/exportImage.ts b/src/routes/production/exportImage.ts
index 8789b0f..71a5e99 100644
--- a/src/routes/production/exportImage.ts
+++ b/src/routes/production/exportImage.ts
@@ -33,19 +33,8 @@ export default router.post(
       const absPath = path.join(getPath("oss"), item.filePath!);
       zipStream.addEntry(absPath, { relativePath: `${index}.${ext}` });
     });
-
-    const fileName = `分镜.zip`;
-    const zipFilePath = getPath(["oss", "temp", fileName]);
-    await new Promise<void>((resolve, reject) => {
-      const fs = require("fs");
-      fs.mkdirSync(getPath(["oss", "temp"]), { recursive: true });
-      const writeStream = fs.createWriteStream(zipFilePath);
-      zipStream.pipe(writeStream);
-      writeStream.on("finish", resolve);
-      writeStream.on("error", reject);
-    });
-
-    const downloadUrl = `${process.env.OSSURL || "http://127.0.0.1:10588/"}temp/${fileName}`;
-    res.json(success({ url: downloadUrl }));
+    res.setHeader("Content-Type", "application/zip");
+    res.setHeader("Content-Disposition", "attachment; filename=export.zip");
+    zipStream.pipe(res);
   },
 );
diff --git a/src/utils/oss.ts b/src/utils/oss.ts
index 370bac7..a5088f5 100644
--- a/src/utils/oss.ts
+++ b/src/utils/oss.ts
@@ -50,7 +50,7 @@ class OSS {
     await this.ensureInit();
     const safePath = normalizeUserPath(userRelPath);
     // URL 始终使用 /，所以这里需要将系统分隔符转回 /
-    let url = `${process.env.OSSURL}${prefix}/` || `http://127.0.0.1:10588/${prefix}/`;
+    let url = `http://127.0.0.1:10588/${prefix}/`;
     if (isEletron()) url = `http://localhost:${process.env.PORT}/${prefix}/`;
     return `${url}${safePath.split(path.sep).join("/")}`;
   }