Add movement gallery wings with period interiors and expand timeline features.

Movement galleries split large catalogs into chronological wings (~55 works), use era-themed 3D interiors with side-wall windows, wing navigator on the back exit, and front archways between wings. Also adds painting annotations, timeline event guides, portrait hover highlights, and documentation/API updates.

Co-authored-by: Cursor <cursoragent@cursor.com>

client/src/api/client.ts

@@ -3,6 +3,7 @@ import type {
   YearBounds,
   Artist,
   ArtistDetail,
+  MovementGalleryDetail,
   PaintingDetail,
   ArtistNavigation,
 } from '../types';
@@ -126,6 +127,8 @@ export interface DebugImageSearchResultItem {
   imageUrl: string;
   thumbUrl?: string;
   source: string;
+  width?: number;
+  height?: number;
 }
 
 export interface DebugImageSearchManyResult {
@@ -173,6 +176,8 @@ export const api = {
 
   getArtist: (id: number) => fetchJson<ArtistDetail>(`${API}/artists/${id}`),
 
+  getMovementGallery: (id: number) => fetchJson<MovementGalleryDetail>(`${API}/movements/${id}/gallery`),
+
   getArtistNavigation: (id: number) =>
     fetchJson<ArtistNavigation>(`${API}/artists/${id}/navigation`),