feat: Add support for custom Whisper API endpoints with robust key ha…

…ndling

tests/basic/test_voice.py

@@ -111,12 +111,13 @@ def test_record_and_transcribe_no_api_key():
 
 def test_record_and_transcribe_custom_base_no_key():
     with patch("aider.voice.sf", MagicMock()):
-        voice = Voice()
-        with patch.dict(os.environ, {"WHISPER_API_BASE": "http://custom.api"}, clear=True):
-            with pytest.raises(Exception) as exc:
-                voice.record_and_transcribe()
-            assert "When using a custom WHISPER_API_BASE" in str(exc.value)
-            assert "via --api whisper=<key>" in str(exc.value)
+        with patch("aider.voice.Voice.raw_record_and_transcribe") as mock_record:
+            voice = Voice()
+            with patch.dict(os.environ, {"WHISPER_API_BASE": "http://custom.api"}, clear=True):
+                with pytest.raises(Exception) as exc:
+                    voice.record_and_transcribe()
+                assert "When using a custom WHISPER_API_BASE" in str(exc.value)
+                assert "via --api whisper=<key>" in str(exc.value)
 
 def test_record_and_transcribe_custom_base_with_key():
     with patch("aider.voice.sf", MagicMock()):