docs: UX P6 backlog + Front#21 (toolbar, empty/toast, i18n).

Refs EventHub/EventHubFront#21

UX-BACKLOG.md

@@ -1,9 +1,11 @@
 # EventHub Front — UX backlog (после stage walk)
 
 Baseline ~6.8/10 → P0–P2 ~**8.0/10** → после P3–P4 deep walk ~**7.7/10** overall
-(код ~8.3, потолок съели litter + opaque id на Отзывах/Тикетах).
+→ после P5 + select fix ~**8.5–9/10**. Цель P6: ощущение **~10**.
 
 P3–P4: [EventHubFront#19](https://git.sabilin.com/EventHub/EventHubFront/issues/19) (closed).
+P5: [EventHubFront#20](https://git.sabilin.com/EventHub/EventHubFront/issues/20) (closed).
+P6: [EventHubFront#21](https://git.sabilin.com/EventHub/EventHubFront/issues/21) (in progress).
 
 Canvas: `eventhub-front-ux-review` → `eventhub-front-ux-rewalk` → **`eventhub-front-ux-deep`**.
 Трекер: [EventHubFront#17](https://git.sabilin.com/EventHub/EventHubFront/issues/17) (P0+P1),
@@ -51,3 +53,19 @@ Canvas: `eventhub-front-ux-review` → `eventhub-front-ux-rewalk` → **`eventhu
 - [x] Календари: overflow «⋯» для Edit/Delete; Pin/Open на виду
 - [x] Month: `title` tooltip на событии в ячейке
 - [x] More: MoodSwitcher checkmark как у Language
+
+## P6 (к ~10, UI 0.1.19+)
+
+Трекер: [EventHubFront#21](https://git.sabilin.com/EventHub/EventHubFront/issues/21). Вариант A (Front-first).
+
+- [x] Toolbar workspace: select + date nav без конфликта на desktop
+- [x] Empty states + CTA (месяц/неделя, отзывы, following)
+- [x] Toasts на create event / book / follow — i18n через `notify.*`
+- [x] i18n: Zod messages + aria date nav
+- [x] Verify: auto-submit `?token=` + redirect `/login?verified=1`
+- [ ] Login forgot password — вне scope A (нужен API → Back)
+
+## Вне scope / ops
+
+- Авто-чистка E2E litter на стендах
+- Полный booking journey polish / mobile gestures