fix: set 1920x1080 @2x viewport before capture

Wide tables (商品件重尺) were getting cut off at the right edge.
Now emulates a 1920x1080 PC viewport at 2x scale before navigating,
ensuring all columns fit in screenshots.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/index.ts

@@ -191,6 +191,15 @@ export async function run(
 
     await cdp.send('Page.enable');
     await cdp.send('Runtime.enable');
+
+    // Set wide PC viewport to ensure tables fit without horizontal overflow
+    await cdp.send('Emulation.setDeviceMetricsOverride', {
+      width: 1920,
+      height: 1080,
+      deviceScaleFactor: 2,
+      mobile: false,
+    });
+
     await cdp.send('Page.navigate', { url });
 
     // Wait for page load + dynamic content