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

tests/ai-toolbar.test.ts

@@ -506,6 +506,24 @@ describe("AI toolbar paste capture", () => {
 		expect(onAiCreate).not.toHaveBeenCalled();
 	});
 
+	test("Mod+Enter ignores combined Ctrl+Meta modifiers", async () => {
+		const onAiCreate = mock();
+
+		const { textareaProps } = await renderToolbarBoundary({
+			aiPrompt: "Draft a kickoff",
+			onAiCreate,
+		});
+		const event = createTextareaKeydownEvent({
+			ctrlKey: true,
+			metaKey: 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();
 
@@ -683,6 +701,36 @@ describe("AI toolbar paste capture", () => {
 		);
 	});
 
+	test("clipboard fallback reuses the same synthesized file name for identical clipboard content", async () => {
+		const onImagesSelect = mock();
+		const clipboardRead = mock(async () => [
+			{
+				types: ["image/png"],
+				getType: async () => new Blob(["same-image"], { 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 }),
+		);
+		await handleDocumentKeydown(
+			createDocumentKeydownEvent({ ctrlKey: true }),
+		);
+
+		expect(onImagesSelect).toHaveBeenCalledTimes(2);
+		expect(onImagesSelect.mock.calls[0]?.[0][0]?.name).toBe(
+			onImagesSelect.mock.calls[1]?.[0][0]?.name,
+		);
+	});
+
 	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 () => [