chore(sprint4): start Sprint 4 — cards

- Sidebar: Sprint 4 · v0.4.0, /components/cards removed from "soon"

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

apps/web/components/layout/Sidebar.tsx

@@ -29,7 +29,7 @@ const NAV: NavSection[] = [
     items: [
       { label: "Кнопки", href: "/components/buttons" },
       { label: "Форм-контролы", href: "/components/forms" },
-      { label: "Карточки", href: "/components/cards", soon: true },
+      { label: "Карточки", href: "/components/cards" },
       { label: "Бейджи и теги", href: "/components/badges", soon: true },
       { label: "Алерты", href: "/components/alerts", soon: true },
       { label: "Модальные окна", href: "/components/modals", soon: true },
@@ -170,7 +170,7 @@ export function Sidebar() {
           color: "var(--bb-sidebar-text-muted)",
         }}
       >
-        Sprint 3 · v0.3.0
+        Sprint 4 · v0.4.0
       </div>
     </aside>
   );