fix: prevent Enter from sending message during recording, play error cue

- Add 'error' cue to playCue() (sawtooth 150Hz)
- Return true instead of false on Enter during recording to consume the key
- Suppress message send when Enter is pressed while recording

extensions/index.ts

@@ -144,11 +144,13 @@ function parseBooleanish(input: string): boolean | undefined {
   return undefined;
 }
 
-function playCue(kind: "start" | "stop") {
+function playCue(kind: "start" | "stop" | "error") {
   if (!config.soundsEnabled) return;
   const args = kind === "start"
     ? ["-q", "-n", "synth", "0.05", "sine", "880", "fade", "q", "0.01", "0.05", "0.02"]
-    : ["-q", "-n", "synth", "0.04", "sine", "660:440", "fade", "q", "0.005", "0.04", "0.02"];
+    : kind === "stop"
+      ? ["-q", "-n", "synth", "0.04", "sine", "660:440", "fade", "q", "0.005", "0.04", "0.02"]
+      : ["-q", "-n", "synth", "0.15", "sawtooth", "150", "fade", "q", "0.01", "0.15", "0.02"];
   const proc = spawn("play", args, { stdio: "ignore", detached: true });
   proc.on("error", () => {});
   proc.unref();
@@ -438,8 +440,9 @@ export default function (pi: ExtensionAPI) {
     Reflect.set(globalThis, VOICE_HANDLER_SYMBOL, (data: string): boolean => {
       if (recording && matchesKey(data, Key.enter)) {
         keyPressed = false;
+        playCue("error");
         void stopRecording(ctx, pi, false, true);
-        return false;
+        return true;
       }
 
       if (recording && config.mode === "paste" && !isKeyRelease(data) && !matchesKey(data, keyId)) {