chore: Improve CLAUDE.md with clearer Effect usage examples

CLAUDE.md

@@ -12,11 +12,14 @@ When making significant changes to the architecture or solving notable problems,
 
 Use functional programming style using effect-ts.
 When doing array operations, use effects Array for mapping, folding, etc.
-When running multiple effects on an array, use the Effect.forEach pattern:
+When running multiple effects on an array, use the `Effect.forEach` pattern:
+```ts
 const results = yield* pipe(items, Effect.forEach(item => Effect.gen(function*(){ ... })))
-When creating Effect services, use Effect.Service pattern:
+```
+When creating Effect services, use `Effect.Service` pattern:
 
-// :white_check_mark: Correct: Class-based service with Effect.Service
+```ts
+// ✅ Correct: Class-based service with Effect.Service
 export class EpisodeService extends Effect.Service<EpisodeService>()(
   "EpisodeService",
   {
@@ -31,7 +34,7 @@ export class EpisodeService extends Effect.Service<EpisodeService>()(
     })
   }
 ) {}
-
+```
 
 Prefer type aliases over interfaces.
 Use react-icons remix icons when you choose a new icon.