refactor: Phase 3a — Global color class migration to SUMI semantics
- Replace all kodo-* color classes across ~100 TSX files:
kodo-void → background, kodo-ink → card, kodo-graphite → muted,
kodo-steel → muted-foreground, kodo-cyan → primary, kodo-magenta → destructive,
kodo-lime → success, kodo-red → destructive, kodo-gold → warning
- Replace cyan-500, magenta-500, lime-500 default Tailwind colors with
semantic equivalents (primary, destructive, success)
- Fix WaveformVisualizer hardcoded hex colors to SUMI values
- Delete global-effects.css (conflicting, redundant with index.css)
Co-authored-by: Cursor <cursoragent@cursor.com>
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