feat(transcription): add shared voice input support (#4232)

* feat(webui): add voice transcription input

* feat(webui): render ANSI output in code blocks

* refactor(webui): isolate voice recorder logic

* refactor(transcription): keep websocket ingress thin

* refactor(transcription): resolve channel audio settings on demand

* style(webui): neutralize voice waveform color

* feat(webui): add voice input tooltip

* feat(webui): add voice input keyboard shortcut

* fix(webui): distinguish voice shortcut platforms

* fix(webui): place voice button after model selector

* refactor(webui): share voice hold recording helpers

* fix(desktop): allow microphone voice input

* fix(webui): stabilize token usage month labels

* feat(webui): show voice input on settings overview

* fix(webui): label voice capability as recognition

* fix(webui): align capability overview status

* refactor(webui): isolate transcription socket handling

* fix(webui): soften silent voice waveform

* refactor(audio): clarify transcription service location

* docs(transcription): clarify audio and provider boundaries

* fix(exec): reduce session output polling flake

tests/webui/test_settings_api.py

@@ -18,6 +18,7 @@ from nanobot.webui.settings_api import (
     update_agent_settings,
     update_model_configuration,
     update_network_safety_settings,
+    update_transcription_settings,
 )
 
 
@@ -243,6 +244,75 @@ def test_settings_payload_includes_network_safety_fields(
     assert payload["advanced"]["ssrf_whitelist_count"] == 1
 
 
+def test_settings_payload_includes_effective_transcription_config(
+    tmp_path,
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    config_path = tmp_path / "config.json"
+    config = Config()
+    config.channels.transcription_provider = "openai"
+    config.channels.transcription_language = "en"
+    config.providers.openai.api_key = "sk-test"
+    save_config(config, config_path)
+    monkeypatch.setattr("nanobot.config.loader._current_config_path", config_path)
+
+    payload = settings_payload()
+
+    assert payload["transcription"]["enabled"] is True
+    assert payload["transcription"]["provider"] == "openai"
+    assert payload["transcription"]["provider_configured"] is True
+    assert payload["transcription"]["model"] == "whisper-1"
+    assert payload["transcription"]["language"] == "en"
+
+
+def test_update_transcription_settings_writes_top_level_only(
+    tmp_path,
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    config_path = tmp_path / "config.json"
+    config = Config()
+    config.channels.transcription_provider = "openai"
+    config.channels.transcription_language = "en"
+    config.providers.groq.api_key = "gsk-test"
+    save_config(config, config_path)
+    monkeypatch.setattr("nanobot.config.loader._current_config_path", config_path)
+
+    payload = update_transcription_settings(
+        {
+            "enabled": ["true"],
+            "provider": ["groq"],
+            "model": ["whisper-large-v3-turbo"],
+            "language": ["ko"],
+            "maxDurationSec": ["90"],
+            "maxUploadMb": ["20"],
+        }
+    )
+
+    saved = load_config(config_path)
+    assert saved.channels.transcription_provider == "openai"
+    assert saved.channels.transcription_language == "en"
+    assert saved.transcription.enabled is True
+    assert saved.transcription.provider == "groq"
+    assert saved.transcription.model == "whisper-large-v3-turbo"
+    assert saved.transcription.language == "ko"
+    assert saved.transcription.max_duration_sec == 90
+    assert saved.transcription.max_upload_mb == 20
+    assert payload["transcription"]["provider"] == "groq"
+    assert payload["transcription"]["provider_configured"] is True
+
+
+def test_update_transcription_settings_validates_language(
+    tmp_path,
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    config_path = tmp_path / "config.json"
+    save_config(Config(), config_path)
+    monkeypatch.setattr("nanobot.config.loader._current_config_path", config_path)
+
+    with pytest.raises(WebUISettingsError, match="transcription language"):
+        update_transcription_settings({"language": ["en-US"]})
+
+
 def test_settings_payload_includes_token_usage_summary(
     tmp_path,
     monkeypatch: pytest.MonkeyPatch,