Refactor API and enhance Angular integration

- Removed `ciTargetName` from `nx.json`.
- Updated `package.json` to include new dependencies: `@types/seedrandom`, `fast-check`, `happy-dom`, and `@nestjs/schedule`.
- Modified `pnpm-lock.yaml` to reflect the addition of new packages and their versions.
- Improved project documentation in `PROJECT_CONTEXT.md` to clarify the use of Zod schemas and Angular framework decisions.
- Introduced new Angular components and patterns in the `.agents/skills/frontend-angular` directory, including examples and reference materials for Angular 21+ features.

apps/overlay/src/app/ebs/auth.interceptor.ts

@@ -0,0 +1,9 @@
+import { HttpInterceptorFn } from '@angular/common/http';
+import { inject } from '@angular/core';
+import { TwitchAuthService } from '../twitch/twitch-auth.service';
+
+export const authInterceptor: HttpInterceptorFn = (req, next) => {
+  const token = inject(TwitchAuthService).auth()?.token;
+  if (!token) return next(req);
+  return next(req.clone({ setHeaders: { Authorization: `Bearer ${token}` } }));
+};