feat: add route-backed project case studies

package.json

@@ -8,7 +8,9 @@
     "start": "next start",
     "lint": "eslint . --max-warnings=0",
     "typecheck": "tsc --noEmit",
-    "test": "node --test tests/*.test.mjs"
+    "test": "node --test tests/*.test.mjs",
+    "pretest:e2e": "node scripts/prepare-standalone.mjs",
+    "test:e2e": "playwright test"
   },
   "dependencies": {
     "lucide-react": "^1.16.0",
@@ -19,6 +21,7 @@
     "three": "^0.180.0"
   },
   "devDependencies": {
+    "@playwright/test": "^1.63.0",
     "@types/node": "^22.13.4",
     "@types/react": "^19.0.10",
     "@types/react-dom": "^19.0.4",