Academy v4: 3 research-backed lessons (30 slides + audio); new bean logo; custom plan/lot names

Co-Authored-By: Claude Fable 5 <[email protected]>

db/migrations/012_custom_names.sql

@@ -0,0 +1,5 @@
+-- Additive only. Custom display names for roast plans and green bean lots, layered on top of
+-- (not replacing) worksheet field 0.1 "Coffee / lot" — COALESCE(NULLIF(name,''), field 0.1) is
+-- the fallback everywhere a plan title is shown.
+ALTER TABLE roast_plans ADD COLUMN name text NOT NULL DEFAULT '';
+ALTER TABLE green_bean_lots ADD COLUMN name text NOT NULL DEFAULT '';