test(ai-toolbar): cover normalized clipboard paste paths

src/components/ai-toolbar.tsx

@@ -52,15 +52,18 @@ async function getClipboardBlobIdentity(blob: Blob): Promise<string> {
 	return (hash >>> 0).toString(16).padStart(8, "0");
 }
 
-async function createClipboardFallbackFile(blob: Blob): Promise<File> {
+async function normalizeClipboardImageFile(blob: Blob): Promise<File> {
 	const identity = await getClipboardBlobIdentity(blob);
-	const extension = blob.type.split("/")[1] || "png";
-	return new File([blob], `clipboard-image-${identity}.${extension}`, {
+	return new File([blob], `clipboard-image-${identity}`, {
 		type: blob.type,
 		lastModified: 0,
 	});
 }
 
+async function normalizeClipboardImageFiles(files: File[]): Promise<File[]> {
+	return Promise.all(files.map((file) => normalizeClipboardImageFile(file)));
+}
+
 // ─── Shared shortcuts list (rendered in both HoverCard and Popover) ───────────
 
 function ShortcutsList({ os }: { os: Os }) {
@@ -194,7 +197,9 @@ export const AIToolbar = ({
 			const images = extractAllImagesFromClipboard(e.clipboardData ?? null);
 			if (images.length > 0) {
 				e.preventDefault();
-				onImagesSelectRef.current(images);
+				void normalizeClipboardImageFiles(images).then((normalizedImages) => {
+					onImagesSelectRef.current(normalizedImages);
+				});
 			}
 		};
 
@@ -241,7 +246,7 @@ export const AIToolbar = ({
 					for (const mimeType of typesToTry) {
 						try {
 							const blob = await clipboardItem.getType(mimeType);
-							files.push(await createClipboardFallbackFile(blob));
+							files.push(await normalizeClipboardImageFile(blob));
 							break; // got this item, move to next clipboardItem
 						} catch {
 							// NotFoundError — type not present, try next
@@ -359,7 +364,11 @@ export const AIToolbar = ({
 									);
 									if (images.length > 0) {
 										e.preventDefault();
-										onImagesSelect(images);
+										void normalizeClipboardImageFiles(images).then(
+											(normalizedImages) => {
+												onImagesSelect(normalizedImages);
+											},
+										);
 									}
 								}}
 							/>