chore: close Sprint 4, open Sprint 5

- Sidebar: Hero/CEO-текст unlocked (not soon), Sprint 5 · v0.5.0
- SPRINTS.md: Sprint 4 marked ✅ ЗАВЕРШЁН, Sprint 5 plan updated
- LLM_CONTEXT.md: v4.1 — cards/badges/alerts section 9b added

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/web/components/layout/Sidebar.tsx

@@ -40,8 +40,8 @@ const NAV: NavSection[] = [
   {
     title: "Блоки",
     items: [
-      { label: "Hero", href: "/blocks/hero", soon: true },
-      { label: "CEO-текст", href: "/blocks/ceo", soon: true },
+      { label: "Hero", href: "/blocks/hero" },
+      { label: "CEO-текст", href: "/blocks/ceo" },
       { label: "Наши врачи", href: "/blocks/doctors", soon: true },
       { label: "Отзывы", href: "/blocks/reviews", soon: true },
       { label: "Новости", href: "/blocks/news", soon: true },
@@ -170,7 +170,7 @@ export function Sidebar() {
           color: "var(--bb-sidebar-text-muted)",
         }}
       >
-        Sprint 4 · v0.4.0
+        Sprint 5 · v0.5.0
       </div>
     </aside>
   );