feat: серии + count-up в Stats

- SeriesGrid: карточки серий с иконками (Sparkles/Plug/Zap/Layers) и цветовыми темами
- /series/[slug]: страница серии с интро и сеткой статей в порядке из article_ids
- Stats: count-up анимация (easeOutQuart 1.2s) при появлении в viewport через IntersectionObserver
- sitemap.xml: добавлены /notes и все серии

app/page.js

@@ -6,21 +6,23 @@ import HeroImage from '@/components/HeroImage';
 import Stats from '@/components/Stats';
 import NowBlock from '@/components/NowBlock';
 import NotesBlock from '@/components/NotesBlock';
+import SeriesGrid from '@/components/SeriesGrid';
 import Reveal from '@/components/Reveal';
-import { listArticles, listTags, getStats, getLive, listNotes } from '@/lib/engine';
+import { listArticles, listTags, getStats, getLive, listNotes, listSeries } from '@/lib/engine';
 import { Sparkles, ArrowRight } from 'lucide-react';
 
 export const dynamic = 'force-dynamic';
 
 export default async function HomePage() {
-  let articles = [], tags = [], stats = null, live = null, notes = [];
+  let articles = [], tags = [], stats = null, live = null, notes = [], series = [];
   try {
-    [articles, tags, stats, live, notes] = await Promise.all([
+    [articles, tags, stats, live, notes, series] = await Promise.all([
       listArticles({ limit: 13 }),
       listTags(),
       getStats(),
       getLive(),
       listNotes({ limit: 6 }),
+      listSeries(),
     ]);
   } catch (err) {
     console.error('Home load failed:', err.message);
@@ -88,6 +90,15 @@ export default async function HomePage() {
         </Reveal>
       )}
 
+      {/* Серии */}
+      {series.length > 0 && (
+        <Reveal>
+          <div className="reveal">
+            <SeriesGrid series={series} />
+          </div>
+        </Reveal>
+      )}
+
       {/* Rest */}
       {rest.length > 0 && (
         <Reveal>

app/series/[slug]/page.js

@@ -0,0 +1,83 @@
+import { notFound } from 'next/navigation';
+import Link from 'next/link';
+import Header from '@/components/Header';
+import Footer from '@/components/Footer';
+import ArticleCard from '@/components/ArticleCard';
+import { getSeries } from '@/lib/engine';
+import { Sparkles, Plug, Zap, Layers, ArrowLeft } from 'lucide-react';
+
+const ICONS = { Sparkles, Plug, Zap, Layers };
+const COLORS = {
+  emerald: { bg: 'rgb(16 185 129 / 0.1)', text: '#10b981' },
+  teal:    { bg: 'rgb(20 184 166 / 0.1)', text: '#14b8a6' },
+  amber:   { bg: 'rgb(245 158 11 / 0.1)', text: '#f59e0b' },
+  indigo:  { bg: 'rgb(99 102 241 / 0.1)', text: '#6366f1' },
+};
+
+export const dynamic = 'force-dynamic';
+
+export async function generateMetadata({ params }) {
+  const { slug } = await params;
+  const s = await getSeries(slug);
+  if (!s) return { title: 'Серия не найдена' };
+  return {
+    title: s.title,
+    description: s.intro,
+  };
+}
+
+export default async function SeriesPage({ params }) {
+  const { slug } = await params;
+  const s = await getSeries(slug);
+  if (!s) notFound();
+  const Icon = ICONS[s.icon] || Layers;
+  const color = COLORS[s.color] || COLORS.emerald;
+
+  return (
+    <>
+      <Header />
+      <main className="pt-8 pb-16">
+        <div className="container-wide mb-8">
+          <Link href="/" className="btn btn-ghost text-sm mb-6 -ml-2">
+            <ArrowLeft className="w-4 h-4" /> Все статьи
+          </Link>
+
+          <div className="flex items-center gap-3 mb-4">
+            <div
+              className="w-12 h-12 sm:w-14 sm:h-14 rounded-xl flex items-center justify-center"
+              style={{ background: color.bg }}
+            >
+              <Icon className="w-6 h-6 sm:w-7 sm:h-7" style={{ color: color.text }} />
+            </div>
+            <div className="text-xs mute uppercase tracking-widest">Серия</div>
+          </div>
+
+          <h1 className="text-3xl sm:text-5xl font-bold ink leading-tight mb-3">
+            {s.title}
+          </h1>
+          {s.intro && (
+            <p className="mute text-base sm:text-lg max-w-2xl leading-relaxed">{s.intro}</p>
+          )}
+          <div className="text-xs mute mt-4">
+            {s.articles?.length || 0} {(s.articles?.length || 0) === 1 ? 'материал' : 'материалов'} в серии
+          </div>
+        </div>
+
+        {s.articles?.length > 0 ? (
+          <div className="container-wide">
+            <div className="grid sm:grid-cols-2 lg:grid-cols-3 gap-5">
+              {s.articles.map(a => <ArticleCard key={a.id} article={a} />)}
+            </div>
+          </div>
+        ) : (
+          <div className="container-wide">
+            <div className="article-card p-8 text-center mute">
+              Скоро здесь появятся статьи. Серия только формируется.
+            </div>
+          </div>
+        )}
+      </main>
+      <Footer />
+    </>
+  );
+}

app/sitemap.js

@@ -1,16 +1,18 @@
-import { listArticles, listTags } from '@/lib/engine';
+import { listArticles, listTags, listSeries } from '@/lib/engine';
 
 const SITE = 'https://zeropost.ru';
 
 export default async function sitemap() {
-  const [articles, tags] = await Promise.all([
+  const [articles, tags, series] = await Promise.all([
     listArticles({ limit: 200 }).catch(() => []),
     listTags().catch(() => []),
+    listSeries().catch(() => []),
   ]);
 
   const staticPages = [
     { url: `${SITE}/`, lastModified: new Date(), changeFrequency: 'daily', priority: 1 },
     { url: `${SITE}/about`, lastModified: new Date(), changeFrequency: 'monthly', priority: 0.5 },
+    { url: `${SITE}/notes`, lastModified: new Date(), changeFrequency: 'daily', priority: 0.6 },
   ];
 
   const articlePages = articles.map(a => ({
@@ -27,5 +29,12 @@ export default async function sitemap() {
     priority: 0.6,
   }));
 
-  return [...staticPages, ...articlePages, ...tagPages];
+  const seriesPages = series.map(s => ({
+    url: `${SITE}/series/${s.slug}`,
+    lastModified: s.updated_at ? new Date(s.updated_at) : new Date(),
+    changeFrequency: 'weekly',
+    priority: 0.7,
+  }));
+
+  return [...staticPages, ...articlePages, ...seriesPages, ...tagPages];
 }