fix(ai-toolbar): keep textarea paste on component path

tests/ai-toolbar.test.ts

@@ -376,6 +376,24 @@ describe("AI capture redesign", () => {
 		expect(onImagesSelect).toHaveBeenCalledTimes(1);
 	});
 
+	test("capture-phase document paste ignores textarea targets before reading clipboard data", async () => {
+		await renderToolbar();
+
+		const handleCapturePaste = getDocumentListener(
+			"paste",
+			(entry) => entry.options?.capture === true,
+		);
+
+		expect(() =>
+			handleCapturePaste({
+				target: { tagName: "TEXTAREA", isContentEditable: false },
+				get clipboardData() {
+					throw new Error("editable paste should stay on the component path");
+				},
+			} as unknown as Event),
+		).not.toThrow();
+	});
+
 	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", {