feat: Ford legacy support, EMEX browser pooling, collapsible sidebar

- Add PL24 Ford legacy service for fordt_parts architecture
- Refactor EMEX to use persistent browser pool instead of per-call instances
- Make vehicle decode resilient: fallback to PL24 when Corgi doesn't recognize VIN
- Add collapsible sidebar with persistent user preference
- Improve brand access guard and categories service
- Add debug/test scripts for VIN e2e testing

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/api/package.json

@@ -49,7 +49,7 @@
     "@types/node": "^22.0.0",
     "@vitest/coverage-v8": "^3.2.4",
     "drizzle-kit": "^0.31.4",
-    "puppeteer": "^23.0.0",
+    "playwright": "^1.50.0",
     "tsx": "^4.19.0",
     "typescript": "^5.7.0",
     "vitest": "^3.0.0"