Replace activity bar icons with distinct, memorable designs: tree
(folders), pin (bookmarks), highlighter (highlights), dinosaur
(history), flask (analysis), hourglass (time gaps), eye (search
configs), clapperboard (video), lightning (live). Make bottom panel
active tab brighter (#fff) with accent border. Add toolbar scroll
shadow indicators to hint at off-screen buttons.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>