fix(components): add unoptimized image prop, overflow containment, and accessibility

Add unoptimized prop to image preview to support blob URLs, contain
overflow on preview container, replace div with semantic section
element in DragDropContainer with aria-label, and import shared
image constants.

src/components/ai-toolbar.tsx

@@ -1,9 +1,9 @@
-import Image from "next/image";
-import { Button } from "@/components/ui/button";
-import { Textarea } from "@/components/ui/textarea";
-import { Card } from "@/components/ui/card";
-import { ImagePicker } from "@/components/image-picker";
 import { X } from "lucide-react";
+import Image from "next/image";
+import { ImagePicker } from "@/components/image-picker";
+import { Button } from "@/components/ui/button";
+import { Card } from "@/components/ui/card";
+import { Textarea } from "@/components/ui/textarea";
 
 interface AIToolbarProps {
 	isAuthenticated: boolean;
@@ -53,13 +53,14 @@ export const AIToolbar = ({
 									onChange={(e) => setAiPrompt(e.target.value)}
 								/>
 								{imagePreview && (
-									<div className="relative mt-2 inline-block">
+									<div className="relative mt-2 inline-block max-w-full overflow-hidden">
 										<Image
 											src={imagePreview}
 											alt="Attached event flyer"
 											className="h-20 rounded-md object-cover border"
 											width={80}
 											height={80}
+											unoptimized
 										/>
 										<Button
 											variant="destructive"