view data fixes

docs/architecture/website/BUILDERS.md

@@ -36,7 +36,7 @@ Transform API DTOs directly into ViewData for templates.
 **Pattern**:
 ```typescript
 export class LeagueViewDataBuilder {
-  static build(apiDto: LeagueApiDto): LeagueDetailViewData {
+  static build(apiDto: LeagueApiDto): LeagueDetailViewData extends ViewData {
     return {
       leagueId: apiDto.id,
       name: apiDto.name,
@@ -192,7 +192,7 @@ export class RaceResultsDataTransformer {
 ✅ **Correct**: Use ViewDataBuilder
 ```typescript
 export class RaceResultsViewDataBuilder {
-  static build(...): RaceResultsViewData { ... }
+  static build(...): RaceResultsViewData extends ViewData { ... }
 }
 ```