Phase 5: campaign management & worldbuilding

- New entities (note/npc/quest/calendar): schemas, Dexie v4 tables, repos, hooks;
  campaign cascade-delete now covers them all
- Dashboard hub: campaign stats, navigation cards, party overview, recent rolls;
  opening a campaign lands here
- Notes/Wiki: tags, [[wiki-links]] with click-to-open/create, backlinks panel,
  full-text search, autosave
- NPC manager (role/location/faction/status) and Quest tracker (status +
  objectives checklist + reward)
- In-world Calendar: integer day counter + events (no real Date -> no timezone bug)
- Fix: calendarRepo.get is read-only (creating-on-read crashed inside liveQuery)

8 new unit tests (wikilinks + extended cascade), worldbuilding e2e.

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

src/lib/wikilinks.ts

@@ -0,0 +1,23 @@
+/** Extract the distinct titles referenced as [[Wiki Links]] in a body of text. */
+export function extractWikiLinks(text: string): string[] {
+  const set = new Set<string>();
+  for (const m of text.matchAll(/\[\[([^\]]+)\]\]/g)) {
+    const title = m[1]?.trim();
+    if (title) set.add(title);
+  }
+  return [...set];
+}
+
+/** Split text into plain segments and [[link]] segments for rendering. */
+export function splitWikiLinks(text: string): { text: string; link?: string }[] {
+  const parts: { text: string; link?: string }[] = [];
+  let last = 0;
+  for (const m of text.matchAll(/\[\[([^\]]+)\]\]/g)) {
+    const idx = m.index ?? 0;
+    if (idx > last) parts.push({ text: text.slice(last, idx) });
+    parts.push({ text: m[1]!.trim(), link: m[1]!.trim() });
+    last = idx + m[0].length;
+  }
+  if (last < text.length) parts.push({ text: text.slice(last) });
+  return parts;
+}