Require cancel listener availability before entering recording state

src/aman.py

@@ -77,11 +77,13 @@ class Daemon:
         self.vocabulary = VocabularyEngine(cfg.vocabulary)
         self._stt_hint_kwargs_cache: dict[str, Any] | None = None
 
-    def _arm_cancel_listener(self):
+    def _arm_cancel_listener(self) -> bool:
         try:
             self.desktop.start_cancel_listener(lambda: self.cancel_recording())
+            return True
         except Exception as exc:
             logging.error("failed to start cancel listener: %s", exc)
+            return False
 
     def _disarm_cancel_listener(self):
         try:
@@ -130,12 +132,23 @@ class Daemon:
         except Exception as exc:
             logging.error("record start failed: %s", exc)
             return
+        if not self._arm_cancel_listener():
+            try:
+                stream.stop()
+            except Exception:
+                pass
+            try:
+                stream.close()
+            except Exception:
+                pass
+            logging.error("recording start aborted because cancel listener is unavailable")
+            return
+
         self.stream = stream
         self.record = record
         prev = self.state
         self.state = State.RECORDING
         logging.debug("state: %s -> %s", prev, self.state)
-        self._arm_cancel_listener()
         logging.info("recording started")
         if self.timer:
             self.timer.cancel()