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/types/index.ts

@@ -96,10 +96,25 @@ export interface InfluenceLink {
   movement_color?: string;
 }
 
+export interface PaintingAnnotation {
+  id: number;
+  label: string | null;
+  body: string;
+  category: string;
+  pos_x: number | null;
+  pos_y: number | null;
+  source_author: string | null;
+  source: string | null;
+  source_url: string | null;
+  sort_order: number;
+  confidence?: string;
+}
+
 export interface PaintingDetail {
   painting: Painting & { artist_name: string; artist_portrait: string | null };
   influencedBy: InfluenceLink[];
   influenced: InfluenceLink[];
+  annotations?: PaintingAnnotation[];
 }
 
 export interface ArtistDetail {
@@ -108,6 +123,11 @@ export interface ArtistDetail {
   paintings: Painting[];
 }
 
+export interface MovementGalleryDetail {
+  movement: ArtMovement & { era_name?: string };
+  paintings: Painting[];
+}
+
 export interface TimelineData {
   eras: HistoricalEra[];
   movements: ArtMovement[];