fix(ai-toolbar): use stable clipboard fallback identities

src/components/ai-toolbar.tsx

@@ -40,12 +40,24 @@ function useOs(): Os {
 	return os;
 }
 
-function createClipboardFallbackFile(blob: Blob, index: number): File {
-	const createdAt = Date.now() + index;
+async function getClipboardBlobIdentity(blob: Blob): Promise<string> {
+	const bytes = new Uint8Array(await blob.arrayBuffer());
+	let hash = 2166136261;
+
+	for (const byte of bytes) {
+		hash ^= byte;
+		hash = Math.imul(hash, 16777619);
+	}
+
+	return (hash >>> 0).toString(16).padStart(8, "0");
+}
+
+async function createClipboardFallbackFile(blob: Blob): Promise<File> {
+	const identity = await getClipboardBlobIdentity(blob);
 	const extension = blob.type.split("/")[1] || "png";
-	return new File([blob], `clipboard-image-${createdAt}.${extension}`, {
+	return new File([blob], `clipboard-image-${identity}.${extension}`, {
 		type: blob.type,
-		lastModified: createdAt,
+		lastModified: 0,
 	});
 }
 
@@ -229,7 +241,7 @@ export const AIToolbar = ({
 					for (const mimeType of typesToTry) {
 						try {
 							const blob = await clipboardItem.getType(mimeType);
-							files.push(createClipboardFallbackFile(blob, files.length));
+							files.push(await createClipboardFallbackFile(blob));
 							break; // got this item, move to next clipboardItem
 						} catch {
 							// NotFoundError — type not present, try next
@@ -317,6 +329,7 @@ export const AIToolbar = ({
 									if (
 										e.key === "Enter" &&
 										(e.metaKey || e.ctrlKey) &&
+										!(e.metaKey && e.ctrlKey) &&
 										!e.shiftKey &&
 										!e.altKey &&
 										!aiLoading &&