* feat(settings): add Advanced tab with whisper.cpp anti-hallucination parameters
Add a new Advanced settings tab that exposes whisper.cpp decoding
parameters to help users reduce hallucinations and tune recognition
behavior.
Parameters exposed:
- No Timestamps (default: on)
- Suppress Non-Speech Tokens (default: on)
- No Context (default: on)
- Initial Prompt (default: empty)
- Temperature (default: 0.0)
- Temperature Increment (default: -1.0, disables fallback)
- Entropy Threshold (default: 2.4)
- Logprob Threshold (default: -1.0)
- No-Speech Threshold (default: 0.6)
All parameters are saved under the advanced config section and are
only active when the whisper.cpp engine is selected. The UI grays out
these settings and shows an explanatory note when another engine is
active.
Changes:
- config_manager.py: add whisper.cpp keys to DEFAULT_CONFIG[advanced]
- recognition_manager.py: read params from kwargs/config, pass to Model()
- main.py: pass advanced settings from config to SpeechRecognitionManager
- settings_dialog.py: new Advanced tab with switches, spin buttons, entry
- tests: update test_main.py assertions, add whispercpp_advanced_defaults
and whispercpp_advanced_persistence tests
Fixes#363
* fix(whispercpp): gracefully filter unsupported params for pywhispercpp 1.4.1
pywhispercpp 1.4.1 does not expose no_timestamps or suppress_non_speech_tokens
to Python even though they exist in the underlying whisper.cpp C struct.
This causes AttributeError on startup.
Add _load_model_with_compatible_params() which catches AttributeError,
identifies the unsupported param from the error message, removes it, and
retries until the model loads successfully or a non-AttributeError occurs.
Also refactor _build_whispercpp_model_kwargs() from _load_whispercpp_model()
for testability.
Fixes local startup crash reported during PR testing.
* fix(whispercpp): persist advanced settings correctly
* chore(config): add advanced power-user default
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
* feat(settings): gate advanced controls behind power-user opt-in
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
* fix(whispercpp): prefilter unsupported native params
* fix(settings): polish advanced whispercpp controls
