docs: note the CREATE form's folds and the white/black point rows

The web form (recipes-web f17cb08) now folds its six categorical groups and
carries EXPOSURE, EV, WHITE and BLACK. WHITE/BLACK do not exist in
ColorAdjustments on either side, so the note spells out the two model fields
and the wh/bl uniforms the tone pass needs — an input row without them would be
dead. A TODO in RecipeCreateModal's header points here.

src/components/RecipeCreateModal.tsx

@@ -18,6 +18,15 @@ import { DEFAULT_ADJUSTMENTS, FILM_SIMS } from '../utils/defaultRecipes';
 // plain textboxes (typed fast, one row each), categorical knobs are chip
 // dropdowns. Used to enter Fuji-style recipes (DR/Highlight/Shadow/Color/NR/
 // Sharpness/Clarity/Grain/CC/CCB/WB+shift/ISO/EV) without touching sliders.
+//
+// TODO (chưa làm — xem `6_CREATE_COLLAPSE.md`, bản web đối chiếu commit
+// f17cb08 của nhánh recipes-web):
+//   1. Gấp sáu nhóm: SIMULATION, DYNAMIC RANGE, GRAIN EFFECT, COLOR CHROME
+//      EFFECT, COLOR CHROME EFFECT BLUE, WHITE BALANCE (WB SHIFT đi kèm WB).
+//   2. Thêm bốn ô số: EXPOSURE, EV (đổi tên từ EXPOSURE COMP.), WHITE, BLACK.
+//      WHITE/BLACK chưa có trong `ColorAdjustments` — phải thêm cả hai field
+//      (src/types/index.ts) và cặp uniform `wh`/`bl` trong `src/utils/toneShader.ts`
+//      (cubic end-weights), nếu không hai ô đó là ô chết.
 
 const haptic = () => Haptics.impactAsync(Haptics.ImpactFeedbackStyle.Light);