test(ai-toolbar): prove textarea paste bypasses global listener

tests/ai-toolbar.test.ts

@@ -333,6 +333,49 @@ describe("AI capture redesign", () => {
 		expect(onImagesSelect).toHaveBeenCalledWith([image]);
 	});
 
+	test("textarea-targeted paste bypasses the document listener and is handled only by the textarea path", async () => {
+		const onImagesSelect = mock();
+		const image = new File(["image-bytes"], "clipboard.png", {
+			type: "image/png",
+		});
+
+		const textareaProps = await renderToolbarBoundary({ onImagesSelect });
+		const handleCapturePaste = getDocumentListener(
+			"paste",
+			(entry) => entry.options?.capture === true,
+		);
+		const handleDocumentPaste = getDocumentListener(
+			"paste",
+			(entry) => !entry.options?.capture,
+		);
+		const preventDefault = mock();
+		const textareaTarget = {
+			tagName: "TEXTAREA",
+			isContentEditable: false,
+		} as HTMLTextAreaElement;
+		const pasteEvent = {
+			target: textareaTarget,
+			currentTarget: textareaTarget,
+			clipboardData: createClipboardData([image]),
+			preventDefault,
+		};
+
+		handleCapturePaste(pasteEvent as unknown as Event);
+		expect(preventDefault).not.toHaveBeenCalled();
+		expect(onImagesSelect).not.toHaveBeenCalled();
+
+		textareaProps.onPaste?.(
+			pasteEvent as unknown as React.ClipboardEvent<HTMLTextAreaElement>,
+		);
+		expect(preventDefault).toHaveBeenCalledTimes(1);
+		expect(onImagesSelect).toHaveBeenCalledTimes(1);
+		expect(onImagesSelect).toHaveBeenCalledWith([image]);
+
+		handleDocumentPaste(pasteEvent as unknown as Event);
+		expect(preventDefault).toHaveBeenCalledTimes(1);
+		expect(onImagesSelect).toHaveBeenCalledTimes(1);
+	});
+
 	test("document paste forwards clipboard images to onImagesSelect only for non-editable targets", async () => {
 		const onImagesSelect = mock();
 		const image = new File(["image-bytes"], "clipboard.png", {