diff --git a/docs/microsoft-store-pwa.md b/docs/microsoft-store-pwa.md
index 962c1a1..1c5e6f8 100644
--- a/docs/microsoft-store-pwa.md
+++ b/docs/microsoft-store-pwa.md
@@ -4,7 +4,7 @@
 
 1. 在 GitHub Actions 手动运行 `PWA Store Build`。
 2. 确认 `production_url` 是最终公开 HTTPS 地址，例如 `https://cs.houlang.cloud/`。
-3. workflow 会执行 `pnpm run build:store`，生成并校验 `dist/manifest.webmanifest`、`dist/sw.js`、图标和 HTML PWA hint。
+3. workflow 会执行 `pnpm run build:store`，生成并校验 `dist/manifest.webmanifest`、`dist/sw.js`、图标、截图和 HTML PWA hint。
 4. 下载 `classworks-pwa-dist` 和 `microsoft-store-handoff` artifacts，作为 PWABuilder 或 Partner Center 提交前的构建记录。
 
 ## 提交到 Microsoft Store
diff --git a/images/1.jpeg b/images/1.jpeg
new file mode 100644
index 0000000..f6b8d1d
Binary files /dev/null and b/images/1.jpeg differ
diff --git a/images/2.jpeg b/images/2.jpeg
new file mode 100644
index 0000000..4d13a96
Binary files /dev/null and b/images/2.jpeg differ
diff --git a/public/images/1.jpeg b/public/images/1.jpeg
new file mode 100644
index 0000000..f6b8d1d
Binary files /dev/null and b/public/images/1.jpeg differ
diff --git a/public/images/2.jpeg b/public/images/2.jpeg
new file mode 100644
index 0000000..4d13a96
Binary files /dev/null and b/public/images/2.jpeg differ
diff --git a/scripts/validate-pwa-build.js b/scripts/validate-pwa-build.js
index c101989..415dca0 100644
--- a/scripts/validate-pwa-build.js
+++ b/scripts/validate-pwa-build.js
@@ -40,6 +40,10 @@ if (!manifest) {
     }
   }
 
+  if (manifest.id !== '7C24F2B3.ClassworksPWA') {
+    fail('manifest.id 必须是 7C24F2B3.ClassworksPWA。');
+  }
+
   if (!['standalone', 'fullscreen', 'minimal-ui'].includes(manifest.display)) {
     fail('manifest.display 应为 standalone、fullscreen 或 minimal-ui。');
   }
@@ -56,6 +60,36 @@ if (!manifest) {
   if (!Array.isArray(manifest.categories) || manifest.categories.length === 0) {
     fail('manifest 缺少 categories，Microsoft Store/PWABuilder 会降低质量评分。');
   }
+
+  const screenshots = Array.isArray(manifest.screenshots) ? manifest.screenshots : [];
+  if (screenshots.length === 0) {
+    fail('manifest 缺少 screenshots。');
+  }
+
+  for (const screenshot of screenshots) {
+    if (!screenshot.src || !screenshot.sizes || !screenshot.type) {
+      fail(`截图条目不完整: ${JSON.stringify(screenshot)}`);
+    } else if (!fileExistsFromManifest(screenshot.src)) {
+      fail(`截图文件不存在: ${screenshot.src}`);
+    }
+  }
+
+  const fileHandlers = Array.isArray(manifest.file_handlers) ? manifest.file_handlers : [];
+  const fileExtensions = new Set(
+    fileHandlers.flatMap((handler) => Object.values(handler.accept || {}).flat())
+  );
+  if (!fileExtensions.has('.csb') || !fileExtensions.has('.csi')) {
+    fail('manifest.file_handlers 必须允许 .csb 和 .csi。');
+  }
+
+  const protocolHandlers = Array.isArray(manifest.protocol_handlers) ? manifest.protocol_handlers : [];
+  if (!protocolHandlers.some((handler) => handler.protocol === 'cs' && handler.url?.includes('%s'))) {
+    fail('manifest.protocol_handlers 必须声明 cs:// 协议处理。');
+  }
+
+  if (manifest.edge_side_panel) {
+    fail('manifest 不应声明 edge_side_panel。');
+  }
 }
 
 if (!fs.existsSync(indexPath)) {
diff --git a/vite.config.mjs b/vite.config.mjs
index f59cd55..60c76b1 100644
--- a/vite.config.mjs
+++ b/vite.config.mjs
@@ -123,7 +123,7 @@ export default defineConfig({
         importScripts: ['sw-cache-manager.js']
       },
       manifest: {
-        id: './',
+        id: '7C24F2B3.ClassworksPWA',
         name: 'Classworks作业板',
         short_name: 'Classworks',
         description: '适用于班级大屏的作业板小工具，支持记录、查看并同步作业。',
@@ -132,18 +132,47 @@ export default defineConfig({
         lang: 'zh-CN',
         dir: 'ltr',
         display: 'standalone',
-        display_override: ['window-controls-overlay', 'standalone', 'minimal-ui'],
+        display_override: ['window-controls-overlay', 'standalone', 'minimal-ui', 'fullscreen'],
         start_url: './',
         scope: './',
         orientation: 'any',
         categories: ['education', 'productivity', 'utilities'],
         prefer_related_applications: false,
         launch_handler: {
-          client_mode: ['navigate-existing', 'auto'],
-        },
-        edge_side_panel: {
-          default_path: './',
+          client_mode: 'navigate-existing',
         },
+        screenshots: [
+          {
+            src: './images/1.jpeg',
+            sizes: '1901x1080',
+            type: 'image/jpeg',
+            form_factor: 'wide',
+            label: 'Classworks 作业板主界面',
+          },
+          {
+            src: './images/2.jpeg',
+            sizes: '1901x1080',
+            type: 'image/jpeg',
+            form_factor: 'wide',
+            label: 'Classworks 设置与管理界面',
+          },
+        ],
+        file_handlers: [
+          {
+            action: './?file-handler=true',
+            accept: {
+              'application/octet-stream': ['.csb', '.csi'],
+              'application/x-classworks-backup': ['.csb'],
+              'application/x-classworks-install': ['.csi'],
+            },
+          },
+        ],
+        protocol_handlers: [
+          {
+            protocol: 'cs',
+            url: './?protocol=%s',
+          },
+        ],
         icons: [
           {
             src: './pwa/image/pwa-64x64.png',