Add view-layer mapping that categorises tasting notes into 9 colour
families (floral, fruity, citrus, sweet, nutty, spice, roasted, sour,
vegetal) based on the SCA Coffee Tasting Wheel. Matching uses
case-insensitive exact lookup against ~90 known terms, then substring
fallback, with pill-muted as the default for unrecognised notes.
- Add tasting_notes module with NoteCategory enum and categorize()
- Add 9 pill CSS variants with light and dark mode support
- Update roast list and timeline templates to render coloured pills
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