cleanup: remove old unused tooling and reference configs

Remove:
- @lhci/cli + lighthouserc.cjs (Lighthouse CI, never used in CI pipeline)
- @playwright/test + e2e/ tests + playwright.config.ts (E2E tests not used)
- setup/ directory (emulator/nitro reference install configs)
- Build artifacts: .next.prev/, coverage/, backups/

e2e/admin.spec.ts

@@ -1,14 +0,0 @@
-import { expect, test } from "@playwright/test";
-
-test.describe("Admin panel", () => {
-	test("admin login page redirects unauthenticated users", async ({ page }) => {
-		await page.goto("/admin");
-		await expect(page).toHaveURL(/login/);
-	});
-
-	test("admin page has login form", async ({ page }) => {
-		await page.goto("/admin");
-		await expect(page.locator('input[name="username"]')).toBeVisible();
-		await expect(page.locator('input[name="password"]')).toBeVisible();
-	});
-});

e2e/auth.spec.ts

@@ -1,32 +0,0 @@
-import { expect, test } from "@playwright/test";
-
-test.describe("Authentication flows", () => {
-	test("login form validates required fields", async ({ page }) => {
-		await page.goto("/login");
-		await page.click('button[type="submit"]');
-		await expect(page.locator("text=required")).toBeVisible({ timeout: 5000 });
-	});
-
-	test("login with invalid credentials shows error", async ({ page }) => {
-		await page.goto("/login");
-		await page.fill('input[name="username"]', "nonexistent");
-		await page.fill('input[name="password"]', "wrongpassword");
-		await page.click('button[type="submit"]');
-		await expect(page.locator("text=invalid")).toBeVisible({ timeout: 5000 });
-	});
-
-	test("register page has password confirmation field", async ({ page }) => {
-		await page.goto("/register");
-		await expect(page.locator('input[name="confirmPassword"]')).toBeVisible();
-	});
-
-	test("register form validates password match", async ({ page }) => {
-		await page.goto("/register");
-		await page.fill('input[name="password"]', "Password123!");
-		await page.fill('input[name="confirmPassword"]', "DifferentPass123!");
-		await page.click('button[type="submit"]');
-		await expect(page.locator("text=match|komen overeen|kloppen")).toBeVisible({
-			timeout: 5000,
-		});
-	});
-});

e2e/example.spec.ts

@@ -1,16 +0,0 @@
-import { expect, test } from "@playwright/test";
-
-test("homepage has title", async ({ page }) => {
-	await page.goto("/");
-	await expect(page).toHaveTitle(/Magic Hotel|Atom/i);
-});
-
-test("register page loads", async ({ page }) => {
-	await page.goto("/register");
-	await expect(page).toHaveTitle(/registreer|register|konto/i);
-});
-
-test("login page loads", async ({ page }) => {
-	await page.goto("/login");
-	await expect(page).toHaveTitle(/inloggen|login/i);
-});

e2e/navigation.spec.ts

@@ -1,24 +0,0 @@
-import { expect, test } from "@playwright/test";
-
-test.describe("Public navigation", () => {
-	test("homepage loads with expected elements", async ({ page }) => {
-		await page.goto("/");
-		await expect(page.locator("nav")).toBeVisible();
-		await expect(page.locator("footer")).toBeVisible();
-	});
-
-	test("community page loads", async ({ page }) => {
-		await page.goto("/community");
-		await expect(page).toHaveTitle(/community/i);
-	});
-
-	test("shop page loads", async ({ page }) => {
-		await page.goto("/shop");
-		await expect(page.locator("h1, h2").first()).toBeVisible();
-	});
-
-	test("404 page for unknown routes", async ({ page }) => {
-		const response = await page.goto("/this-page-does-not-exist");
-		expect(response?.status()).toBe(404);
-	});
-});