Improve editor behavior and UI options
- Fix Swift code being misclassified as C# by unifying language detection
- Remove conflicting AI-based language detection on paste
- Route paste, open, and edit events through LanguageDetector
- Add toggle for translucent editor background
- Persist translucency preference across sessions
- Minor cleanup of conflicting or redundant editor logic
Full Changelog: v0.2.7-alpha...v0.2.9-alpha