feat: add event narrative and evidence workflow

src/exhibitRegistry.tsx

@@ -1,5 +1,5 @@
 import type { ComponentType } from 'react'
-import { BookOpen, FileText, Folder, FolderOpen, Image as ImageIcon, Pencil } from 'lucide-react'
+import { BookOpen, CalendarClock, FileText, Folder, FolderOpen, Image as ImageIcon, Pencil } from 'lucide-react'
 import type { CaseDocument, Evidence, EvidenceType, SourceFileType } from './types'
 import { folderIsOpen } from './boardDomain'
 
@@ -9,6 +9,7 @@ export type ExhibitWidgetProps = {
   onOpenSource: (id: string) => void
   onToggleFolder: (id: string) => void
   onEditFolder: (id: string) => void
+  onEditEvent: (id: string) => void
 }
 
 export type ExhibitWidgetDefinition = {
@@ -32,6 +33,14 @@ function StandardWidget({ exhibit, onOpenSource }: ExhibitWidgetProps) {
   </div>
 }
 
+function EventWidget({ exhibit, onEditEvent }: ExhibitWidgetProps) {
+  const supportCount = exhibit.supportingEvidenceIds?.length || 0
+  return <div className="card-content"><h3>{exhibit.title}</h3><p>{exhibit.content}</p>
+    {exhibit.eventDate && <time>{new Date(exhibit.eventDate).toLocaleString()}</time>}
+    <div className="event-actions"><span>{supportCount} SUPPORTING EXHIBIT{supportCount === 1 ? '' : 'S'}</span><button onClick={() => onEditEvent(exhibit.id)}><CalendarClock size={12}/> EDIT EVENT</button></div>
+  </div>
+}
+
 const standardPoint = (exhibit: Evidence) => ({ x: exhibit.x + exhibit.width / 2, y: exhibit.y + 68 })
 const folderDefinition: ExhibitWidgetDefinition = {
   visualType: 'folder', heading: (_exhibit, documents) => `EVIDENCE FOLDER / ${documents.length}`,
@@ -42,7 +51,7 @@ export const exhibitWidgetRegistry: Record<EvidenceType, ExhibitWidgetDefinition
   folder: folderDefinition,
   evidence: folderDefinition,
   note: { visualType: 'note', heading: () => 'INVESTIGATOR / NOTE', connectionPoint: exhibit => ({ x: exhibit.x + 54, y: exhibit.y + 12 }), Component: StandardWidget },
-  event: { visualType: 'event', heading: () => 'EVENT / THIS HAPPENED', connectionPoint: standardPoint, Component: StandardWidget },
+  event: { visualType: 'event', heading: () => 'EVENT / THIS HAPPENED', connectionPoint: standardPoint, Component: EventWidget },
 }
 
 export function exhibitWidget(type: EvidenceType) {