refactor: move navigation page from /components to /blocks section

- Moved /components/navigation → /blocks/navigation
- Updated Sidebar: navigation is now first item in "Блоки"
- Updated PreviewClient block path
- Updated seed block path
- Updated SPRINTS.md

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/web/app/blocks/navigation/page.tsx

@@ -53,12 +53,12 @@ export default function NavigationPage() {
           className="text-xs font-semibold uppercase tracking-widest mb-1"
           style={{ color: "var(--brand-053m)" }}
         >
-          Компоненты
+          Блоки
         </p>
         <h1 className="text-2xl font-bold mb-2" style={{ color: "var(--bb-text)" }}>
           Шапка и навигация
         </h1>
-        <BlockMetaBar path="/components/navigation" defaultVersion="v1.0" defaultIsInPreview={true} />
+        <BlockMetaBar path="/blocks/navigation" defaultVersion="v1.0" defaultIsInPreview={true} />
         <p className="text-sm" style={{ color: "var(--bb-text-muted)" }}>
           Точное воспроизведение шапки с perm.oclinica.ru/lor. Три зоны: топ-бар, логотип, главное меню.
         </p>
@@ -189,7 +189,7 @@ export default function NavigationPage() {
       </section>
 
       {/* LLM блок */}
-      <LlmBlock path="/components/navigation" version="v1.0" specText={LLM_NAV_TEXT}>
+      <LlmBlock path="/blocks/navigation" version="v1.0" specText={LLM_NAV_TEXT}>
         <LlmSection title="Зоны шапки" />
         <LlmTable
           headers={["Зона", "Высота", "Фон", "Содержимое"]}

apps/web/app/pages/preview/PreviewClient.tsx

@@ -49,8 +49,8 @@ const BLOCKS: BlockDef[] = [
   {
     id: "navigation",
     name: "Шапка / Навигация",
-    href: "/components/navigation",
-    path: "/components/navigation",
+    href: "/blocks/navigation",
+    path: "/blocks/navigation",
     defaultReady: true,
     component: <NavigationBlock />,
   },