feat: harden kanban responsiveness and visual system

scripts/capture-kanban.mjs

@@ -0,0 +1,31 @@
+import { chromium } from 'playwright';
+import path from 'node:path';
+
+const url = process.argv[2];
+const mode = process.argv[3];
+
+if (!url || !mode) {
+  console.error('Usage: node scripts/capture-kanban.mjs <url> <before|after>');
+  process.exit(1);
+}
+
+const shots = [
+  { name: 'mobile', width: 390, height: 844 },
+  { name: 'tablet', width: 768, height: 1024 },
+  { name: 'desktop', width: 1440, height: 900 },
+];
+
+const browser = await chromium.launch({ headless: true });
+
+for (const shot of shots) {
+  const page = await browser.newPage({ viewport: { width: shot.width, height: shot.height } });
+  await page.goto(url, { waitUntil: 'networkidle' });
+  await page.waitForTimeout(700);
+  await page.screenshot({
+    path: path.join('artifacts', `kanban-${shot.name}-${mode}.png`),
+    fullPage: true,
+  });
+  await page.close();
+}
+
+await browser.close();