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]>

package-lock.json

@@ -35,6 +35,7 @@
         "zustand": "^5.0.8"
       },
       "devDependencies": {
+        "@playwright/test": "^1.61.0",
         "@resvg/resvg-js": "^2.6.2",
         "@tailwindcss/typography": "^0.5.10",
         "@testing-library/jest-dom": "^6.9.1",
@@ -3236,6 +3237,22 @@
         "node": ">=14"
       }
     },
+    "node_modules/@playwright/test": {
+      "version": "1.61.0",
+      "resolved": "https://registry.npmjs.org/@playwright/test/-/test-1.61.0.tgz",
+      "integrity": "sha512-cKA5B6lpFEMyMGjxF54QihfYpB4FkEGH+qZhtArDEG+wezQAJY8Pq6C7T1SjWz+FFzt3TbyoXBQYk/0292TdJA==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "playwright": "1.61.0"
+      },
+      "bin": {
+        "playwright": "cli.js"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@polka/url": {
       "version": "1.0.0-next.29",
       "resolved": "https://registry.npmjs.org/@polka/url/-/url-1.0.0-next.29.tgz",