feat: add model and vocabulary settings

src/voice_transcriptor/ui/settings_dialog.py

@@ -10,11 +10,13 @@ from PySide6.QtWidgets import (
     QDialog,
     QDialogButtonBox,
     QCheckBox,
+    QComboBox,
     QFileDialog,
     QFormLayout,
     QHBoxLayout,
     QLineEdit,
     QMessageBox,
+    QPlainTextEdit,
     QPushButton,
     QSpinBox,
     QToolButton,
@@ -24,7 +26,17 @@ from PySide6.QtWidgets import (
 
 from voice_transcriptor.models import AppSettings
 from voice_transcriptor.services.credentials import CredentialError, CredentialService
-from voice_transcriptor.services.settings import SettingsError, SettingsRepository
+from voice_transcriptor.services.settings import SUPPORTED_MODEL_SUGGESTIONS, SettingsError, SettingsRepository
+
+
+class EditableModelCombo(QComboBox):
+    """Editable model picker with the previous line-edit convenience API."""
+
+    def text(self) -> str:
+        return self.currentText()
+
+    def setText(self, value: str) -> None:
+        self.setCurrentText(value)
 
 
 class SettingsDialog(QDialog):
@@ -44,7 +56,10 @@ class SettingsDialog(QDialog):
         self._credentials = credentials
         self.setWindowTitle("Settings")
 
-        self.model_input = QLineEdit(settings.model, self)
+        self.model_input = EditableModelCombo(self)
+        self.model_input.setEditable(True)
+        self.model_input.addItems(SUPPORTED_MODEL_SUGGESTIONS)
+        self.model_input.setCurrentText(settings.model)
         self.model_input.setObjectName("modelInput")
         self.language_input = QLineEdit(settings.language, self)
         self.language_input.setObjectName("languageInput")
@@ -53,6 +68,9 @@ class SettingsDialog(QDialog):
         self.api_key_input.setEchoMode(QLineEdit.EchoMode.Password)
         self.output_directory_input = QLineEdit(str(settings.output_directory), self)
         self.output_directory_input.setObjectName("outputDirectoryInput")
+        self.context_input = QPlainTextEdit(settings.context_vocabulary, self)
+        self.context_input.setObjectName("contextVocabularyInput")
+        self.context_input.setPlaceholderText("Names, acronyms, technical terms, and conversation context")
         self.choose_directory_button = QPushButton("Browse…", self)
         self.choose_directory_button.setObjectName("chooseDirectoryButton")
         self.choose_directory_button.clicked.connect(self.choose_output_directory)
@@ -65,6 +83,7 @@ class SettingsDialog(QDialog):
         form.addRow("OpenAI API key", self.api_key_input)
         form.addRow("Model", self.model_input)
         form.addRow("Language", self.language_input)
+        form.addRow("Context / Vocabulary", self.context_input)
         form.addRow("Output directory", output_directory_layout)
 
         self.advanced_toggle = QToolButton(self)
@@ -133,7 +152,7 @@ class SettingsDialog(QDialog):
             )
             return
 
-        model = self.model_input.text().strip()
+        model = self.model_input.currentText().strip()
         language = self.language_input.text().strip()
         if not model or not language:
             QMessageBox.warning(self, "Invalid settings", "Model and language are required.")
@@ -146,7 +165,7 @@ class SettingsDialog(QDialog):
             return
         updated_settings = AppSettings(
             model, language, output_directory, chunk_duration, overlap,
-            self.retain_temporary_files_input.isChecked(),
+            self.retain_temporary_files_input.isChecked(), self.context_input.toPlainText().strip(),
         )
         try:
             self._repository.save(updated_settings)

tests/ui/test_settings_dialog.py

@@ -3,11 +3,12 @@ from __future__ import annotations
 from pathlib import Path
 
 import pytest
-from PySide6.QtWidgets import QLineEdit, QMessageBox
+from PySide6.QtWidgets import QComboBox, QLineEdit, QMessageBox
 
 from voice_transcriptor.models import AppSettings
 from voice_transcriptor.services.credentials import CredentialError
 from voice_transcriptor.services.settings import SettingsError
+from voice_transcriptor.services.settings import SUPPORTED_MODEL_SUGGESTIONS
 from voice_transcriptor.ui.settings_dialog import SettingsDialog
 
 
@@ -53,6 +54,10 @@ def test_populates_fields_from_settings(qtbot, settings: AppSettings) -> None:
     assert dialog.advanced_panel.isVisible() is False
     assert dialog.chunk_duration_input.value() == 900
     assert dialog.chunk_overlap_input.value() == 15
+    assert isinstance(dialog.model_input, QComboBox)
+    assert dialog.model_input.isEditable()
+    assert tuple(dialog.model_input.itemText(i) for i in range(dialog.model_input.count())) == SUPPORTED_MODEL_SUGGESTIONS
+    assert dialog.context_input.toPlainText() == settings.context_vocabulary
 
 
 def test_advanced_settings_are_saved(qtbot, settings: AppSettings) -> None:
@@ -98,10 +103,11 @@ def test_save_persists_new_api_key_and_emits_saved_settings(qtbot, settings: App
 
     dialog.api_key_input.setText(supplied_key)
     dialog.model_input.setText("gpt-4o-mini-transcribe")
+    dialog.context_input.setPlainText("Pix, Banco do Brasil")
     dialog.save()
 
     assert saved_with.args == [
-        AppSettings("gpt-4o-mini-transcribe", "pt-BR", settings.output_directory)
+        AppSettings("gpt-4o-mini-transcribe", "pt-BR", settings.output_directory, context_vocabulary="Pix, Banco do Brasil")
     ]
     assert credentials.api_key == supplied_key
     assert repository.saved == saved_with.args