Introduces a fetchWithRetry method to handle network errors and rate limiting (503, 429) with exponential backoff in AudibleService. Updates getPopularAudiobooks and getNewReleases to use this retry logic and improves error handling to stop pagination on errors but return collected results. Test cases are updated to use non-retryable errors (404) for more accurate coverage.
Introduced a Vitest-based backend unit testing framework with supporting scripts, helpers, and GitHub Actions integration. Refactored the admin settings page to a modular architecture, splitting monolithic logic into feature-specific tabs and hooks for improved maintainability and testability. Updated documentation to reflect the new testing setup and settings architecture, and added new dependencies for testing utilities.
kikootwo