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/src/integrations/pl24/pl24.module.ts

@@ -1,9 +1,10 @@
 import { Module } from "@nestjs/common";
 import { PL24Service } from "./pl24.service";
 import { PL24AuthService } from "./pl24-auth.service";
+import { PL24FordLegacyService } from "./pl24-ford-legacy.service";
 
 @Module({
-  providers: [PL24Service, PL24AuthService],
-  exports: [PL24Service, PL24AuthService],
+  providers: [PL24Service, PL24AuthService, PL24FordLegacyService],
+  exports: [PL24Service, PL24AuthService, PL24FordLegacyService],
 })
 export class PL24Module {}