TUI Theme V2 Migration Checklist

Add semantic accent foreground and border tokens so components stop reading hue.accent[300] directly.
Add paired badge or label foreground/background tokens to replace V1 secondary usages.
Add strong warning and error background treatments with matching readable foregrounds.
Use text.default for active cursors, background.surface.offset for disabled cursors, and a lighter accent hue for focused form borders.
Add background.surface.offset and background.surface.overlay, map them from V1 panel/menu backgrounds, and use them as contextual surface defaults.
Replace selectedForeground with complete V2 foreground/background pairs or a V2 contrast helper that supports transparent themes.
Decide whether thinking opacity is fixed at 0.6 or belongs in a separate presentation-token system.
Generate syntax styles from resolved V2 tokens, then migrate each UI surface and remove the V1 proxy once no flat V1 color reads remain.