fix(sprint-5): sync block CSS styles with real site perm.oclinica.ru/lor

- H1: 36px #cb9768 (was ~20px #53514e)
- H2 sections: 36px #000 (was ~20-30px #111827)
- Hero title: 22px #333 (was 16px #111827)
- Hero CTA: pill style (was outline)
- Contact forms bg: #d4f6f8 for both (was #b8e6ed / #fff)
- News bg: #f2fee6 (was #fff)
- Added version changelogs to all block pages
- Updated typography, LLM_CONTEXT v4.3, SPRINTS.md

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

apps/web/components/blocks/NewsBlock.tsx

@@ -25,9 +25,9 @@ export function NewsBlock() {
   return (
     <div
       className="rounded-xl p-8 space-y-6"
-      style={{ background: "#fff", border: "1px solid var(--bb-border)" }}
+      style={{ background: "#f2fee6" }}
     >
-      <h2 className="text-xl font-bold" style={{ color: "#111827" }}>
+      <h2 className="font-bold" style={{ color: "#000000", fontSize: 36, lineHeight: "38px" }}>
         Новости
       </h2>
       <div className="grid grid-cols-2 md:grid-cols-4 gap-4">