feat(landing): ✨ Add mock API handler for landing page responses in handlers.ts

Co-Authored-By: Lilith Autocommit <noreply@atlilith.com>

features/landing/backend-api-msw/src/handlers.ts

@@ -9,6 +9,7 @@
  * not cross-feature shared handlers.
  */
 
+import type { RequestHandler } from 'msw'
 import { composeHandlers } from '@lilith/msw-handlers'
 
 // Auth (SSO)
@@ -20,7 +21,7 @@ import { blogHandlers } from '../../../blog/shared/msw'
 // Merchant (subscription tiers)
 import { tiersHandlers } from '../../../merchant/shared/msw'
 
-export const allHandlers = composeHandlers(
+export const allHandlers: RequestHandler[] = composeHandlers(
   authHandlers,
   blogHandlers,
   tiersHandlers,