refactor(persons): update all callers for the paged /api/persons response

GET /api/persons now returns PersonSearchResult { items, … } instead of a bare
list. Update every caller: the dashboard top-persons path reads .items; the
unused full-list fetches in documents/new and documents/[id]/edit are dropped
(both pages use the self-fetching PersonTypeahead); the raw-fetch consumers
(PersonTypeahead, PersonMultiSelect, PersonMentionEditor) read body.items and
pass review=true so search still spans the whole directory. Specs updated to
the new envelope shape.

Refs #667

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

frontend/src/routes/+page.server.ts

@@ -52,7 +52,7 @@ export async function load({ fetch, parent }) {
 				await Promise.allSettled(readerFetches);
 
 			const readerStats = settled<StatsDTO>(statsRes);
-			const topPersons = settled<PersonSummaryDTO[]>(topPersonsRes) ?? [];
+			const topPersons = settled<{ items: PersonSummaryDTO[] }>(topPersonsRes)?.items ?? [];
 			const searchData = settled<{ items: { document: Document }[] }>(recentDocsRes);
 			const recentDocs = searchData?.items.map((i) => i.document) ?? [];
 			const recentStories = settled<Geschichte[]>(recentStoriesRes) ?? [];