feat: wire guide data source and POI focus UI

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/domain/museum.ts

@@ -0,0 +1,123 @@
+export interface MuseumFloor {
+  id: string
+  label: string
+  order: number
+}
+
+export interface MuseumCategory {
+  id: string
+  label: string
+  iconType?: string
+}
+
+export interface MuseumPoi {
+  id: string
+  name: string
+  floorId: string
+  floorLabel: string
+  primaryCategory: MuseumCategory
+  categories: MuseumCategory[]
+  positionGltf?: [number, number, number]
+  sourceConfidence?: string
+  navigationReadiness?: string
+  accessible: boolean
+}
+
+export interface MuseumHall {
+  id: string
+  name: string
+  floorId?: string
+  floorLabel?: string
+  description?: string
+  image?: string
+  exhibitCount?: number
+  area?: string
+  poiId?: string
+}
+
+export interface MuseumExhibit {
+  id: string
+  name: string
+  hallId?: string
+  hallName?: string
+  floorId?: string
+  floorLabel?: string
+  image?: string
+  description?: string
+  poiId?: string
+  artist?: string
+  year?: string
+  material?: string
+  size?: string
+  tags?: string[]
+}
+
+export interface GuideLocationPreview {
+  poiId: string
+  name: string
+  floorId: string
+  floorLabel: string
+  primaryCategoryZh?: string
+  positionGltf?: [number, number, number]
+}
+
+export interface GuideStartLocation {
+  label: string
+  floor?: string
+  source?: string
+}
+
+export interface GuidePreviewStep {
+  id: string
+  text: string
+}
+
+export interface GuideLocationPreviewPlan {
+  id: string
+  facilityId: string
+  target: string
+  summary: string
+  steps: GuidePreviewStep[]
+  targetLocation: GuideLocationPreview | null
+  startLocation: GuideStartLocation | null
+}
+
+export interface GuideRouteReadiness {
+  ready: boolean
+  message: string
+  requiredData: string[]
+}
+
+export interface MediaAsset {
+  id: string
+  type: 'audio' | 'image' | 'transcript'
+  url?: string
+  duration?: number
+  language?: string
+  available: boolean
+  unavailableReason?: string
+}
+
+export interface ExplainTrack {
+  id: string
+  exhibitId?: string
+  hallId?: string
+  title: string
+  summary?: string
+  mediaId?: string
+  coverImage?: string
+  poiId?: string
+  floorId?: string
+  available: boolean
+}
+
+export interface SearchIndexItem {
+  id: string
+  name: string
+  desc: string
+  type: 'exhibit' | 'hall' | 'facility'
+  poiId?: string
+  floorId?: string
+  exhibitId?: string
+  hallId?: string
+}