Update extension UI, spelling rules, and benchmark artifacts

Fix structural regressions

Fix 30 NLP edge cases in Grammar, Spelling, and Punctuation (Phase 10 results and Extension UI improvements)

fix: enable punctuation model for clean texts while keeping structural guards

feat: enhance extension UI and improve Smart Colon Guard

feat(extension): update icons, fix logo in ui, and improve content script positioning/observers

add the new version of the extention

delete the extention to add the new version due to bug

Phase 7.1: Cleanup & Stabilization Sprint