summary
Long DoughCalc build session (v19 through v42). Add-ins system, edit-in-place saved-recipe saving, Rename/Delete, a Print feature requiring three real bug fixes, dynamic Basic-steps instructions simplified to two states, collapsible sections (default hidden), Yeast/Malt moved to Add-ins. Fixed a blank-field bug and a Flour-label HTML bug. Logged real fermentation data: garlic suppression confirmed, rosemary/dill no notable slowdown. Corrected stale -08/-80 gov-naming guidance in knowledge-80.md and todo-80.md.