fix(ai-toolbar): tighten modifier and clipboard fallback guards

tests/ai-toolbar.test.ts

@@ -488,6 +488,24 @@ describe("AI toolbar paste capture", () => {
 		expect(onAiCreate).toHaveBeenCalledTimes(1);
 	});
 
+	test("Mod+Enter ignores extra modifiers so Shift+Ctrl+Enter does not generate", async () => {
+		const onAiCreate = mock();
+
+		const { textareaProps } = await renderToolbarBoundary({
+			aiPrompt: "Draft a kickoff",
+			onAiCreate,
+		});
+		const event = createTextareaKeydownEvent({
+			ctrlKey: true,
+			shiftKey: true,
+		});
+
+		textareaProps.onKeyDown?.(event);
+
+		expect(event.preventDefault).not.toHaveBeenCalled();
+		expect(onAiCreate).not.toHaveBeenCalled();
+	});
+
 	test("Mod+Enter does not trigger AI generation while loading", async () => {
 		const onAiCreate = mock();
 
@@ -630,6 +648,41 @@ describe("AI toolbar paste capture", () => {
 		expect(onImagesSelect.mock.calls[0]?.[0][0]?.type).toBe("image/png");
 	});
 
+	test("clipboard fallback creates distinct files for same-sized clipboard images", async () => {
+		const onImagesSelect = mock();
+		const clipboardRead = mock(async () => [
+			{
+				types: ["image/png"],
+				getType: async () => new Blob(["abcd"], { type: "image/png" }),
+			},
+			{
+				types: ["image/png"],
+				getType: async () => new Blob(["wxyz"], { type: "image/png" }),
+			},
+		]);
+
+		(globalThis as { navigator?: Navigator }).navigator = {
+			clipboard: { read: clipboardRead },
+		} as Navigator;
+
+		await renderToolbar({ onImagesSelect });
+
+		const handleDocumentKeydown = getDocumentListener("keydown");
+
+		await handleDocumentKeydown(
+			createDocumentKeydownEvent({ ctrlKey: true }),
+		);
+
+		expect(onImagesSelect).toHaveBeenCalledTimes(1);
+		expect(onImagesSelect.mock.calls[0]?.[0]).toHaveLength(2);
+		expect(onImagesSelect.mock.calls[0]?.[0][0]?.name).not.toBe(
+			onImagesSelect.mock.calls[0]?.[0][1]?.name,
+		);
+		expect(onImagesSelect.mock.calls[0]?.[0][0]?.size).toBe(
+			onImagesSelect.mock.calls[0]?.[0][1]?.size,
+		);
+	});
+
 	test("async clipboard fallback does not double-handle a paste already handled by the synchronous document paste flow", async () => {
 		const onImagesSelect = mock();
 		const clipboardRead = mock(async () => [