P1: path routing, prerender shells, E2E, and HelmetProvider donate fix.

Replace hash URLs with path-based routing, post-build prerender for money pages, Playwright smoke tests, and wrap the app in HelmetProvider so /donate mounts correctly.

Co-authored-by: Cursor <[email protected]>

playwright.config.ts

@@ -0,0 +1,17 @@
+import { defineConfig, devices } from '@playwright/test'
+
+export default defineConfig({
+  testDir: './e2e',
+  fullyParallel: true,
+  forbidOnly: !!process.env.CI,
+  retries: process.env.CI ? 1 : 0,
+  workers: process.env.CI ? 1 : undefined,
+  reporter: [['list']],
+  use: {
+    baseURL: process.env.MIM_E2E_BASE_URL || 'https://mim4u.org',
+    extraHTTPHeaders:
+      process.env.MIM_E2E_BASE_URL?.includes('192.168') ? { Host: 'mim4u.org' } : {},
+    trace: 'on-first-retry',
+  },
+  projects: [{ name: 'chromium', use: { ...devices['Desktop Chrome'] } }],
+})