Add standalone API proxy via curl (bypasses WAF TLS fingerprinting)

Modern.js SSR intercepts all routes before any Express middleware,
so the API proxy runs as a separate Express server on port 8080.
Modern.js runs on 8081. The proxy uses curl subprocesses which go
through the system HTTPS proxy (GOST) with a proper TLS fingerprint
that the Aeroflot WAF accepts.

Usage: node scripts/dev-server.mjs (replaces pnpm dev for full-stack)

Also: remove stray e2e-angular test directory, fix env default to
same-origin /api.

tests/e2e-angular/visual/flight-board.spec.ts

@@ -0,0 +1,23 @@
+import { test, expect } from '@playwright/test';
+import { todayStr } from '../../src/lib/date-utils';
+
+const today = todayStr();
+const dateParam = today.replace(/-/g, '');
+
+test.describe('Flight board visual regression', () => {
+  test('departures view matches screenshot', async ({ page }) => {
+    await page.goto(`/ru-ru/onlineboard/departure/MOW-${dateParam}`);
+    await page.waitForLoadState('networkidle');
+    await expect(page).toHaveScreenshot('flight-board-departures.png', {
+      fullPage: true,
+    });
+  });
+
+  test('arrivals view matches screenshot', async ({ page }) => {
+    await page.goto(`/ru-ru/onlineboard/arrival/MOW-${dateParam}`);
+    await page.waitForLoadState('networkidle');
+    await expect(page).toHaveScreenshot('flight-board-arrivals.png', {
+      fullPage: true,
+    });
+  });
+});

tests/e2e-angular/visual/flight-expanded.spec.ts

@@ -0,0 +1,21 @@
+import { test, expect } from '@playwright/test';
+import { todayStr } from '../../src/lib/date-utils';
+
+const today = todayStr();
+const dateParam = today.replace(/-/g, '');
+
+test.describe('Expanded flight card visual regression', () => {
+  test('expanded card matches screenshot', async ({ page }) => {
+    await page.goto(`/ru-ru/onlineboard/departure/MOW-${dateParam}`);
+    await page.waitForLoadState('networkidle');
+
+    await page.waitForSelector('[class*="card"]', { timeout: 10000 });
+
+    const firstCard = page.locator('[class*="card"]').first();
+    await firstCard.click();
+
+    const expandedSection = page.locator('[class*="expanded"]').first();
+    await expect(expandedSection).toBeVisible();
+    await expect(expandedSection).toHaveScreenshot('flight-expanded.png', { timeout: 10000 });
+  });
+});

tests/e2e-angular/visual/landing.spec.ts

@@ -0,0 +1,15 @@
+import { test, expect } from '@playwright/test';
+import { todayStr } from '../../src/lib/date-utils';
+
+const today = todayStr();
+const dateParam = today.replace(/-/g, '');
+
+test.describe('Landing page visual regression', () => {
+  test('matches landing page screenshot', async ({ page }) => {
+    await page.goto(`/ru-ru/onlineboard/departure/MOW-${dateParam}`);
+    await page.waitForLoadState('networkidle');
+    await expect(page).toHaveScreenshot('landing.png', {
+      fullPage: true,
+    });
+  });
+});