v0.2.2 — Popup Dictionary & UI Improvements

• Smoother popup dictionary — reduced scroll jitter across all surfaces (YouTube, Netflix, Prime Video, webpages)
• Compact popup header — word, frequency rank, and transliteration now on one line
• Consistent popup sizing — proportional width and height across all viewports
• Status button hover effects now work correctly in all popup contexts
• Mine Sentence button hover effect added
• Compact extension popup — action buttons replaced with icon buttons (subtitles browser, study mode, video stats, mining deck, romanized)
• Icon buttons have tooltips on hover and adapt to light/dark mode
• Subtitle browser cards now have visible borders in light mode
• Prime Video SPA navigation — subtitles detected without page refresh when navigating from Amazon browse pages
• Responsive status button sizing across viewport sizes