## CHANGES
- Add Spotify plugin with OAuth token handling and metadata
- Wire --spotify flag into CLI processing and output
- Register Spotify in plugin setup, env, and registry
- Update shell completions to include --spotify option
- Add i18n strings for Spotify configuration errors
- Add unit and integration tests for Spotify API
- Set gopls integration build tags for workspace
- Replace hardcoded strings with i18n.T translations
- Add en and es JSON locale files
- Implement custom translated help system
- Enable language detection from CLI args
- Add locale download capability
- Localize error messages throughout codebase
- Support TTS and notification translations
### CHANGES
- Add early return if registry is nil to prevent panics.
- Introduce early return for non-chat tool operations.
- Update error message to use original input on HTML readability failure.
- Enhance error wrapping for playlist video fetching.
- Modify temp patterns folder name with timestamp for uniqueness.
- Improve error handling for patterns directory access.
### CHANGES
* Extract chat processing logic into separate function
* Create modular command handlers for setup, configuration, listing, management, and extensions
* Improve patterns loader with migration support and better error handling
* Simplify main CLI logic by delegating to specialized handlers
* Enhance code organization and maintainability
* Add tool processing for YouTube and web scraping functionality
