feat: support multiple image uploads for AI event generation 🖼️

- Updated OpenRouter integration to accept an array of image URLs
- Updated ImagePicker to use the `multiple` attribute natively
- Added `appendImagesDeduped` for handling client-side image deduplication
- Enhanced clipboard pasting to extract multiple images at once
- Rendered multiple images in a horizontal thumbnail strip in the AIToolbar
- Added tests to cover multi-image logic and AI request mapping

src/components/events-list.tsx

@@ -19,13 +19,13 @@ export const EventsList = ({ events, onEdit, onDelete }: EventsListProps) => {
 				animate={{ opacity: 1 }}
 				className="flex flex-col items-center justify-center py-16 text-center"
 			>
-			<Calendar1Icon className="h-10 w-10 text-muted-foreground/40 mb-3" />
-			<h3 className="text-sm font-medium text-muted-foreground">
-				No events yet
-			</h3>
-			<p className="text-xs text-muted-foreground/60 mt-1">
-				Create your first event to get started
-			</p>
+				<Calendar1Icon className="h-10 w-10 text-muted-foreground/40 mb-3" />
+				<h3 className="text-sm font-medium text-muted-foreground">
+					No events yet
+				</h3>
+				<p className="text-xs text-muted-foreground/60 mt-1">
+					Create your first event to get started
+				</p>
 			</motion.div>
 		);
 	}