- Created comprehensive state middleware (stateMiddleware.ts) with:
* Logging: State change logging with configurable filters
* Analytics: Event tracking for state changes, actions, errors, performance
* Error handling: Automatic error capture and reporting
* Sanitization: Remove sensitive data from logs
* Performance tracking: Monitor async action durations
- Applied middleware to LibraryStore as example
- Added comprehensive test suite (7 tests, all passing)
- Configurable options for all features
- Global handlers for analytics and errors
