refactor: Refine type definitions

- Enhance type safety for dashboard projects
- Generalize `withCacheControl` to accept any `Response`

app/(dashboard)/dashboard/page.tsx

@@ -78,7 +78,7 @@ export default async function DashboardPage() {
   }
   const workspaces = Array.from(workspaceMap, ([id, name]) => ({ id, name }));
 
-  const serializedProjects = projects.map((p) => ({
+  const serializedProjects = projects.map((p: typeof projects[0]) => ({
     id: p.id,
     name: p.name,
     description: p.description,

lib/api-response.ts

@@ -126,7 +126,7 @@ export function successResponse<T>(
   return NextResponse.json(body, { status });
 }
 
-export function withCacheControl<T>(response: NextResponse<T>, value: string): NextResponse<T> {
+export function withCacheControl<T>(response: Response, value: string): Response {
   response.headers.set('Cache-Control', value);
   return response;
 }