feat(ui): semantic tokens on track detail and profile pages
Track detail: cover border, overlay, action cards, stats cards, skeleton; tabs list and count badge; back button hover; info metadata row, waveform container, metadata card → border-border, bg-card/80, bg-muted/*
Profile: skeleton card and tabs; tabs list, count badges, card borders; track/playlist/post cards (aspect-video bg, titles, overlay); header card, stats strip, divider → border-border, bg-card/80, text-foreground, muted
Co-authored-by: Cursor <cursoragent@cursor.com>
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