Phase 7: structured ruleset data (Open5e 5e + Foundry PF2e classes)

- Scrapers scripts/fetch_open5e.ts (classes/races/backgrounds/feats, CC-BY/OGL) and
  fetch_foundry_pf2e.ts (25 PF2e classes, OGL/ORC) → normalized JSON in src/data/srd
  + public/data/pf2e/classes.json.
- src/lib/ruleset/normalize.ts: pure, tested normalizers → unified RulesetClass
  (hit die, key abilities, saves/ranks, perception, skills, caster, subclasses, profs).
- compendium loaders (loadClasses/loadRaces5e/loadBackgrounds5e) + a "Classes" tab for
  both systems (ClassDetail) with full stats; Bestiary stays the default category.
- Data-source attribution in Settings. Feeds the Phase 5 builder.

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

scripts/fetch_open5e.ts

@@ -0,0 +1,48 @@
+/* Scrape Open5e (SRD 5.1, CC-BY-4.0 / OGL) → normalized JSON in src/data/srd/.
+ * Run: bunx tsx scripts/fetch_open5e.ts */
+import { writeFileSync } from 'node:fs';
+import { normalizeOpen5eClass, type Open5eClass } from '../src/lib/ruleset/normalize';
+
+const BASE = 'https://api.open5e.com/v1';
+
+async function all<T = Record<string, unknown>>(path: string): Promise<T[]> {
+  let url: string | null = `${BASE}/${path}/?limit=500`;
+  const out: T[] = [];
+  while (url) {
+    const r = await fetch(url);
+    if (!r.ok) throw new Error(`${path}: ${r.status}`);
+    const j = (await r.json()) as { results: T[]; next: string | null };
+    out.push(...j.results);
+    url = j.next;
+  }
+  return out;
+}
+
+const first = (s: string | undefined): string => {
+  const p = (s ?? '').replace(/[#*_`>]/g, '').split('\n').map((x) => x.trim()).filter(Boolean)[0] ?? '';
+  return p.length > 500 ? `${p.slice(0, 497)}…` : p;
+};
+
+async function main() {
+  const classes = (await all<Open5eClass>('classes')).map(normalizeOpen5eClass).sort((a, b) => a.name.localeCompare(b.name));
+  writeFileSync('src/data/srd/classes.json', JSON.stringify(classes));
+
+  const races = (await all<Record<string, string>>('races')).map((r) => ({
+    slug: r.slug, name: r.name, desc: first(r.desc), asi: r.asi_desc ?? '', speed: r.speed_desc ?? '', vision: r.vision ?? '', traits: first(r.traits),
+  })).sort((a, b) => a.name.localeCompare(b.name));
+  writeFileSync('src/data/srd/races.json', JSON.stringify(races));
+
+  const backgrounds = (await all<Record<string, string>>('backgrounds')).map((b) => ({
+    slug: b.slug, name: b.name, desc: first(b.desc), skills: b.skill_proficiencies ?? '', tools: b.tool_proficiencies ?? '', languages: b.languages ?? '', feature: b.feature ?? '',
+  })).sort((a, b) => a.name.localeCompare(b.name));
+  writeFileSync('src/data/srd/backgrounds.json', JSON.stringify(backgrounds));
+
+  const feats = (await all<Record<string, string>>('feats')).map((f) => ({
+    slug: f.slug, name: f.name, desc: first(f.desc), prerequisite: f.prerequisite ?? '',
+  })).sort((a, b) => a.name.localeCompare(b.name));
+  writeFileSync('src/data/srd/feats.json', JSON.stringify(feats));
+
+  console.log(`5e: classes ${classes.length}, races ${races.length}, backgrounds ${backgrounds.length}, feats ${feats.length}`);
+}
+
+main().catch((e) => { console.error(e); process.exit(1); });