refactor(e2e): extract reusable captureProofshots helper

Any future feature spec now just calls:
  captureProofshots('/my-route', 'feature-name')

to get 6 screenshots (3 viewports × 2 themes) saved to
proofshot-artifacts/{feature-name}/.

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

frontend/e2e/dashboard-screenshots.spec.ts

@@ -1,45 +1,3 @@
-/**
+import { captureProofshots } from './proofshots';
- * Captures dashboard screenshots at multiple viewport sizes and in both
- * light and dark theme. Output goes to proofshot-artifacts/dashboard/.
- * Run via: npx playwright test e2e/dashboard-screenshots.spec.ts
- */
-import { test } from '@playwright/test';
-import path from 'path';
-import fs from 'fs';
-import { fileURLToPath } from 'url';
 
-const __dirname = path.dirname(fileURLToPath(import.meta.url));
+captureProofshots('/', 'dashboard');
-const outDir = path.join(__dirname, '../../proofshot-artifacts/dashboard');
-fs.mkdirSync(outDir, { recursive: true });
-
-const viewports = [
-	{ name: 'mobile', width: 390, height: 844 },
-	{ name: 'tablet', width: 768, height: 1024 },
-	{ name: 'desktop', width: 1440, height: 900 }
-];
-
-for (const vp of viewports) {
-	for (const theme of ['light', 'dark'] as const) {
-		test(`dashboard – ${vp.name} – ${theme}`, async ({ page }) => {
-			await page.setViewportSize({ width: vp.width, height: vp.height });
-			await page.goto('/');
-
-			// Apply theme
-			await page.evaluate((t) => {
-				document.documentElement.setAttribute('data-theme', t);
-				localStorage.setItem('theme', t);
-			}, theme);
-
-			// Wait for the main content to be rendered.
-			// 'networkidle' is unreliable in SvelteKit dev mode due to the HMR WebSocket.
-			await page.waitForLoadState('domcontentloaded');
-			// Wait for at least one dashboard widget or the search bar to be visible
-			await page.waitForSelector('main', { state: 'visible' });
-
-			await page.screenshot({
-				path: path.join(outDir, `dashboard-${vp.name}-${theme}.png`),
-				fullPage: true
-			});
-		});
-	}
-}

frontend/e2e/proofshots.ts

@@ -0,0 +1,58 @@
+/**
+ * Shared proofshot helper for Playwright.
+ *
+ * Usage in any spec file:
+ *   import { captureProofshots } from './proofshots';
+ *   captureProofshots('/persons', 'persons');
+ *
+ * This registers one test per viewport × theme combination.
+ * Screenshots are saved to proofshot-artifacts/{featureName}/.
+ */
+import { test } from '@playwright/test';
+import path from 'path';
+import fs from 'fs';
+import { fileURLToPath } from 'url';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
+const viewports = [
+	{ name: 'mobile', width: 390, height: 844 },
+	{ name: 'tablet', width: 768, height: 1024 },
+	{ name: 'desktop', width: 1440, height: 900 }
+];
+
+/**
+ * Registers Playwright tests that navigate to `url`, apply each theme,
+ * and capture full-page screenshots at all standard viewports.
+ *
+ * @param url         The path to screenshot (e.g. '/', '/persons', '/admin')
+ * @param featureName Used as the output directory name and screenshot file prefix
+ */
+export function captureProofshots(url: string, featureName: string): void {
+	const outDir = path.join(__dirname, '../../proofshot-artifacts', featureName);
+	fs.mkdirSync(outDir, { recursive: true });
+
+	for (const vp of viewports) {
+		for (const theme of ['light', 'dark'] as const) {
+			test(`${featureName} – ${vp.name} – ${theme}`, async ({ page }) => {
+				await page.setViewportSize({ width: vp.width, height: vp.height });
+				await page.goto(url);
+
+				// Apply theme via data-theme attribute and localStorage
+				await page.evaluate((t) => {
+					document.documentElement.setAttribute('data-theme', t);
+					localStorage.setItem('theme', t);
+				}, theme);
+
+				// 'networkidle' is unreliable in SvelteKit dev mode due to the HMR WebSocket.
+				await page.waitForLoadState('domcontentloaded');
+				await page.waitForSelector('main', { state: 'visible' });
+
+				await page.screenshot({
+					path: path.join(outDir, `${featureName}-${vp.name}-${theme}.png`),
+					fullPage: true
+				});
+			});
+		}
+	}
+}