feat: refine assistant logic and update docs

app/core/audio_manager.py

@@ -130,11 +130,9 @@ class AudioManager:
             if match_idx is not None:
                 return match_idx
 
-            raise RuntimeError(
-                "Audio input initialization failed: could not find an input device "
-                f"matching AUDIO_INPUT_DEVICE_NAME={AUDIO_INPUT_DEVICE_NAME!r}. "
-                "Available input devices:\n"
-                + self.describe_input_devices()
+            print(
+                "⚠️ AUDIO_INPUT_DEVICE_NAME was set but no matching input device was found: "
+                f"{AUDIO_INPUT_DEVICE_NAME!r}. Falling back to default input selection."
             )
 
         # Default input device (if PortAudio has one).
@@ -176,11 +174,9 @@ class AudioManager:
             )
             if match_idx is not None:
                 return match_idx
-            raise RuntimeError(
-                "Audio output initialization failed: could not find an output device "
-                f"matching AUDIO_OUTPUT_DEVICE_NAME={AUDIO_OUTPUT_DEVICE_NAME!r}. "
-                "Available output devices:\n"
-                + self.describe_output_devices()
+            print(
+                "⚠️ AUDIO_OUTPUT_DEVICE_NAME was set but no matching output device was found: "
+                f"{AUDIO_OUTPUT_DEVICE_NAME!r}. Falling back to default output selection."
             )
 
         default_idx = self._get_default_output_index()