Add Obsidian Wrapped feature (inside-LMS, client-side vault parsing)

- WrappedRun Prisma model + migration (aggregates only, no note names/text)
- /wrapped authed route: FSA + webkitdirectory + drag-drop reader, Web Worker parser
- archetype + score heuristics, ДС-2 result card
- POST /api/wrapped/run (userId from session), public /share/wrapped/[token]
- next/og OG image (Satori+resvg-wasm, alpine-safe) + Fira Mono ttf
- middleware: /share/wrapped public

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/app/(student)/wrapped/_client/parse.worker.ts

@@ -0,0 +1,81 @@
+// Web Worker: парсит .md-тексты в агрегаты (off-main, без фриза UI).
+// Получает RawNote[], возвращает Stats. Тексты заметок дальше воркера не идут.
+
+import type { RawNote, Stats, Period, Archetype } from "./types";
+
+const WIKILINK = /\[\[([^\]|#]+)/g;
+const TAG = /(^|\s)#([\p{L}\d_/-]+)/gu;
+const DAY = 864e5;
+
+function filterByPeriod(notes: RawNote[], period: Period): RawNote[] {
+  if (period === "all") return notes;
+  const cutoff = Date.now() - (period === "year" ? 365 * DAY : 90 * DAY);
+  return notes.filter((n) => n.mtime >= cutoff);
+}
+
+function buildStats(
+  notes: RawNote[],
+  degree: Map<string, number>,
+  tags: Map<string, number>,
+  linkCount: number,
+  period: Period,
+): Stats {
+  const noteCount = notes.length;
+  const topTags = [...tags.entries()].sort((a, b) => b[1] - a[1]).slice(0, 5).map(([tag, n]) => ({ tag, n }));
+  const topLinked = [...degree.entries()].sort((a, b) => b[1] - a[1]).slice(0, 5).map(([name, d]) => ({ name, degree: d }));
+
+  // Сирота — заметка, на которую никто не ссылается (грубая оценка по имени).
+  const linkedTargets = new Set(degree.keys());
+  const orphans = notes.filter((n) => !linkedTargets.has(n.name.replace(/\.md$/i, ""))).length;
+
+  const months = new Map<string, number>();
+  for (const n of notes) {
+    const d = new Date(n.mtime);
+    const k = `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, "0")}`;
+    months.set(k, (months.get(k) ?? 0) + 1);
+  }
+  const busiestMonth = [...months.entries()].sort((a, b) => b[1] - a[1])[0]?.[0] ?? "";
+
+  const linkDensity = noteCount ? linkCount / noteCount : 0;
+  const tagDensity = noteCount ? tags.size / noteCount : 0;
+  const orphanRatio = noteCount ? orphans / noteCount : 1;
+
+  let archetype: Archetype;
+  if (linkDensity >= 2) archetype = "architect";
+  else if (tagDensity >= 0.5) archetype = "librarian";
+  else if (orphanRatio >= 0.4) archetype = "gardener";
+  else archetype = "pragmatist";
+
+  const score = Math.max(0, Math.min(100, Math.round(
+    Math.min(linkDensity / 3, 1) * 45 + Math.min(tagDensity, 1) * 25 + Math.min(noteCount / 300, 1) * 30,
+  )));
+
+  const achievements: string[] = [];
+  if (noteCount >= 100) achievements.push(`${noteCount} заметок`);
+  if (linkCount >= 200) achievements.push(`${linkCount} связей`);
+  if (tags.size >= 30) achievements.push(`${tags.size} тегов`);
+  if (linkDensity >= 3) achievements.push("Плотная сеть знаний");
+  if (orphanRatio < 0.1 && noteCount >= 50) achievements.push("Почти нет сирот");
+
+  return { noteCount, linkCount, tagCount: tags.size, topTags, topLinked, orphans, busiestMonth, achievements, archetype, score, period };
+}
+
+self.onmessage = (e: MessageEvent<{ notes: RawNote[]; period: Period }>) => {
+  const { notes, period } = e.data;
+  const filtered = filterByPeriod(notes, period);
+  const degree = new Map<string, number>();
+  const tags = new Map<string, number>();
+  let linkCount = 0;
+  for (const n of filtered) {
+    for (const m of n.text.matchAll(WIKILINK)) {
+      linkCount++;
+      const t = m[1].trim();
+      if (t) degree.set(t, (degree.get(t) ?? 0) + 1);
+    }
+    for (const m of n.text.matchAll(TAG)) {
+      const t = m[2];
+      tags.set(t, (tags.get(t) ?? 0) + 1);
+    }
+  }
+  self.postMessage(buildStats(filtered, degree, tags, linkCount, period));
+};