fix(onboarding): use storageServiceProvider instead of raw StorageService

[KashifKhn]

Summary

• Converts OnboardingScreen from StatefulWidget to ConsumerStatefulWidget
• Replaces the raw StorageService() instantiation and manual init() call with ref.read(storageServiceProvider), consistent with every other screen in the app
• Removes the now-unused storage_service.dart import and adds alarm_provider.dart

Root Cause

_OnboardingScreenState._next() was constructing a second StorageService instance and calling init() on it independently, which could race or diverge from the singleton managed by Riverpod.

Testing

• flutter analyze --fatal-infos — zero issues
• flutter test — all 30 tests pass
• dart format — no changes needed

Closes #13

[vercel]

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Project	Deployment	Actions	Updated (UTC)
drawbell	Ready	Preview	Aug 11, 2026 5:31am