feat: add comprehensive end-to-end test suite

e2e/test_toggle_record_stop.ts

@@ -0,0 +1,51 @@
+import { setupTest, startEngine, startClientInTmux, openCmdFifo, writeFifoCommand, wait, readStatusNonBlock, teardownTest } from './test_utils';
+
+export async function testToggleRecordStop(): Promise<void> {
+  console.log("\nTest: TOGGLE RECORD / STOP");
+  setupTest();
+  const engine = await startEngine();
+  await startClientInTmux();
+  openCmdFifo();
+  await wait(500);
+
+  // Send 'record 0' via FIFO to start recording
+  writeFifoCommand("record 0");
+  await wait(1500);
+
+  // Read status non‑blocking and look for RECORD
+  const stAfterRecord = readStatusNonBlock();
+  if (stAfterRecord.includes("RECORD")) {
+    console.log("  PASS: Status shows RECORD");
+  } else {
+    // Wait a bit more and retry once
+    await wait(500);
+    const st2 = readStatusNonBlock();
+    if (st2.includes("RECORD")) {
+      console.log("  PASS: Status shows RECORD (after delay)");
+    } else {
+      console.log("  STATUS data: " + st2);
+      console.log("  WARN: Did not see RECORD in status");
+    }
+  }
+
+  // Stop
+  writeFifoCommand("stop");
+  await wait(1500);
+
+  const stAfterStop = readStatusNonBlock();
+  if (stAfterStop.includes("IDLE")) {
+    console.log("  PASS: Status shows IDLE after stop");
+  } else {
+    await wait(500);
+    const st3 = readStatusNonBlock();
+    if (st3.includes("IDLE")) {
+      console.log("  PASS: Status shows IDLE after stop (after delay)");
+    } else {
+      console.log("  WARN: Did not see IDLE in status");
+      console.log("  STATUS data: " + st3);
+    }
+  }
+
+  engine.kill();
+  teardownTest();
+}