feat(sprint-5.5): store block metadata (version, changelog) in PostgreSQL

- Prisma schema: added `changelog Json @default("[]")` to Block model
- Migration: 20260324141120_add_changelog_field
- Seed: 8 blocks with actual versions (v1.0–v1.2) and changelog entries
- API: PATCH /blocks/by-path accepts changelog field
- CORS: accept any localhost port (regex pattern)
- BlockChangelog component: renders version history from API or fallback
- BlockMetaBar: loads changelog from API, passes to BlockChangelog
  - Removed "API офлайн" text, replaced with subtle gray dot
  - Added defaultChangelog prop for offline fallback
- Block pages: removed hardcoded changelog JSX, use defaultChangelog prop
- Updated SPRINTS.md with completed tasks

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

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

@@ -1,6 +1,7 @@
 import type { Metadata } from "next";
 import { LlmBlock, LlmSection, LlmTable, LlmRules } from "@/components/llm/LlmBlock";
 import { BlockMetaBar } from "@/components/ui/BlockMetaBar";
+import { type ChangelogEntry } from "@/components/ui/BlockChangelog";
 import { ReviewsBlock } from "@/components/blocks/ReviewsBlock";
 
 export const metadata: Metadata = {
@@ -52,6 +53,16 @@ const LLM_REVIEWS_TEXT = `
 ✕ Не убирать навигационные стрелки
 `.trim();
 
+const CHANGELOG: ChangelogEntry[] = [
+  {
+    version: "v1.1",
+    date: "24.03.2026",
+    changes: [
+      "H2: размер с ~20px на 36px, цвет с #111827 на #000000, line-height 38px",
+    ],
+  },
+];
+
 export default function ReviewsBlockPage() {
   return (
     <div className="p-8 max-w-5xl mx-auto space-y-10">
@@ -66,7 +77,7 @@ export default function ReviewsBlockPage() {
         <h1 className="text-2xl font-bold mb-2" style={{ color: "var(--bb-text)" }}>
           Блок «Отзывы о нас»
         </h1>
-        <BlockMetaBar path="/blocks/reviews" defaultVersion="v1.1" defaultIsInPreview={false} />
+        <BlockMetaBar path="/blocks/reviews" defaultVersion="v1.1" defaultIsInPreview={false} defaultChangelog={CHANGELOG} />
         <p className="text-sm" style={{ color: "var(--bb-text-muted)" }}>
           Карусель отзывов с perm.oclinica.ru/lor — большая кавычка, текст, «Читать полностью», стрелки.
         </p>
@@ -157,19 +168,6 @@ export default function ReviewsBlockPage() {
         </div>
       </section>
 
-      {/* Changelog */}
-      <section className="space-y-3">
-        <h2 className="font-semibold text-base" style={{ color: "var(--bb-text)" }}>
-          История версий
-        </h2>
-        <div className="p-3 rounded-lg" style={{ background: "var(--bb-sidebar-bg)", border: "1px solid var(--bb-border)" }}>
-          <p className="font-semibold text-xs mb-1" style={{ color: "var(--bb-text)" }}>v1.1 — 24.03.2026</p>
-          <ul className="list-disc list-inside space-y-0.5 text-xs" style={{ color: "var(--bb-text-muted)" }}>
-            <li>H2: размер с ~20px на <strong>36px</strong>, цвет с #111827 на <strong>#000000</strong>, line-height 38px</li>
-          </ul>
-        </div>
-      </section>
-
       {/* LLM блок */}
       <LlmBlock path="/blocks/reviews" version="v1.1" specText={LLM_REVIEWS_TEXT}>
         <LlmSection title="Структура блока" />