test: guard embedded subscribe mock calls

src/agents/pi-embedded-runner/run/llm-idle-timeout.test.ts

@@ -438,7 +438,7 @@ describe("streamWithIdleTimeout", () => {
     expect(error).toBeInstanceOf(Error);
     expect((error as Error).message).toMatch(/LLM idle timeout/);
     expect(onIdleTimeout).toHaveBeenCalledTimes(1);
-    const [timeoutError] = onIdleTimeout.mock.calls[0] ?? [];
+    const [timeoutError] = onIdleTimeout.mock.calls.at(0) ?? [];
     expect(timeoutError).toBeInstanceOf(Error);
     expect((timeoutError as Error).message).toMatch(/LLM idle timeout/);
   });

src/agents/pi-embedded-subscribe.handlers.tools.test.ts

@@ -179,7 +179,7 @@ describe("handleToolExecutionStart read path checks", () => {
     await handleToolExecutionStart(ctx, evt);
 
     expect(warn).toHaveBeenCalledTimes(1);
-    expect(String(warn.mock.calls[0]?.[0] ?? "")).toContain("read tool called without path");
+    expect(String(warn.mock.calls.at(0)?.[0] ?? "")).toContain("read tool called without path");
   });
 
   it("awaits onBlockReplyFlush before continuing tool start processing", async () => {

src/agents/pi-embedded-subscribe.subscribe-embedded-pi-session.includes-canvas-action-metadata-tool-summaries.test.ts

@@ -22,7 +22,7 @@ describe("subscribeEmbeddedPiSession", () => {
     await Promise.resolve();
 
     expect(onToolResult).toHaveBeenCalledTimes(1);
-    const payload = onToolResult.mock.calls[0][0];
+    const payload = onToolResult.mock.calls.at(0)?.[0];
     expect(payload.text).toContain("🖼️");
     expect(payload.text).toContain("Canvas");
     expect(payload.text).toContain("/tmp/a2ui.jsonl");

src/agents/pi-embedded-subscribe.subscribe-embedded-pi-session.reopens-fenced-blocks-splitting-inside-them.test.ts

@@ -34,6 +34,6 @@ describe("subscribeEmbeddedPiSession", () => {
     emitAssistantTextDeltaAndEnd({ emit, text });
 
     expect(onBlockReply).toHaveBeenCalledTimes(3);
-    expect(onBlockReply.mock.calls[1][0].text).toBe("~~~sh\nline1\nline2\n~~~");
+    expect(onBlockReply.mock.calls.at(1)?.[0].text).toBe("~~~sh\nline1\nline2\n~~~");
   });
 });

src/agents/pi-embedded-subscribe.subscribe-embedded-pi-session.subscribeembeddedpisession.test.ts

@@ -249,7 +249,7 @@ describe("subscribeEmbeddedPiSession", () => {
       await flushBlockReplyCallbacks();
 
       expect(onBlockReply).toHaveBeenCalledTimes(1);
-      expect(onBlockReply.mock.calls[0][0].text).toBe("Final answer");
+      expect(onBlockReply.mock.calls.at(0)?.[0].text).toBe("Final answer");
 
       const streamTexts = onReasoningStream.mock.calls
         .map((call) => call[0]?.text)