Comprehensive refactoring to improve naming consistency and code quality:
- Rename all "V2" references to "fluent" across codebase
- Update CHANGELOG-BETA.md to use "fluent" scope consistently
- Update comments and documentation from "V2" to "fluent"
- Improve FluentTopNavigation notification count updates:
- Add async notification count loading to prevent UI blocking
- Add event listeners for CACHE_READY and TASK_CACHE_UPDATED
- Improve error handling for notification updates
- Fix ProjectDataCache to use ProjectConfigManager settings
- Improve type safety with explicit imports and type annotations
- Code formatting and cleanup across fluent components
- Remove unnecessary type casts and improve type definitions
This refactoring improves code readability and maintainability while
preserving all existing functionality.