task 00e: inject phonetic.Fetcher and translation.Translator into gui.New()

Add PhoneticFetcher and Translator fields to gui.Config so callers can
inject ready-to-use instances. gui.New() uses the injected values when
non-nil and falls back to constructing from provider/key fields otherwise.
The processor composition root now builds both dependencies and sets them
on gui.Config, keeping construction logic out of gui.New().

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2 files changed, 47 insertions, 10 deletions

diff --git a/internal/gui/app.go b/internal/gui/app.go
index f9d941d..666c763 100644
--- a/internal/gui/app.go
+++ b/internal/gui/app.go
@@ -127,6 +127,11 @@ type Config struct {
 	TranslationProvider translation.Provider
 	PhoneticProvider    phonetic.Provider
 	AutoPlay            bool // Whether to automatically play audio when generated or navigated to
+
+	// Injectable dependencies — when non-nil, New() uses them directly instead of
+	// constructing new instances from the provider/key fields above.
+	PhoneticFetcher *phonetic.Fetcher
+	Translator      *translation.Translator
 }
 
 const (
@@ -221,12 +226,24 @@ func New(config *Config) *Application {
 
 	// Set up audio configuration
 	app.audioConfig = audioConfigForApp(config)
-	app.phoneticFetcher = phonetic.NewFetcher(&phonetic.Config{
-		Provider:     config.PhoneticProvider,
-		OpenAIKey:    config.OpenAIKey,
-		GoogleAPIKey: config.GoogleAPIKey,
-	})
-	app.translator = translation.NewTranslator(translationConfigForApp(config))
+
+	// Use injected phonetic fetcher when provided; otherwise construct from config fields.
+	if config.PhoneticFetcher != nil {
+		app.phoneticFetcher = config.PhoneticFetcher
+	} else {
+		app.phoneticFetcher = phonetic.NewFetcher(&phonetic.Config{
+			Provider:     config.PhoneticProvider,
+			OpenAIKey:    config.OpenAIKey,
+			GoogleAPIKey: config.GoogleAPIKey,
+		})
+	}
+
+	// Use injected translator when provided; otherwise construct from config fields.
+	if config.Translator != nil {
+		app.translator = config.Translator
+	} else {
+		app.translator = translation.NewTranslator(translationConfigForApp(config))
+	}
 
 	app.setupUI()
 
diff --git a/internal/processor/processor.go b/internal/processor/processor.go
index 54c99c3..c79e892 100644
--- a/internal/processor/processor.go
+++ b/internal/processor/processor.go
@@ -714,19 +714,39 @@ func (p *Processor) guiConfigForRunMode() *gui.Config {
 		imageProvider = gui.DefaultConfig().ImageProvider
 	}
 
+	openAIKey := cli.GetOpenAIKey()
+	googleAPIKey := cli.GetGoogleAPIKey()
+	translationProvider := translation.Provider(viper.GetString("translation.provider"))
+	phoneticProvider := phonetic.Provider(viper.GetString("phonetic.provider"))
+
+	// Construct and inject phonetic/translation dependencies at the composition root
+	// so gui.New() receives ready-to-use instances rather than raw config strings.
+	phoneticFetcher := phonetic.NewFetcher(&phonetic.Config{
+		Provider:     phoneticProvider,
+		OpenAIKey:    openAIKey,
+		GoogleAPIKey: googleAPIKey,
+	})
+	translator := translation.NewTranslator(&translation.Config{
+		Provider:    translationProvider,
+		OpenAIKey:   openAIKey,
+		GeminiModel: viper.GetString("translation.gemini_model"),
+	})
+
 	return &gui.Config{
 		AudioFormat:         p.effectiveAudioFormat(),
 		AudioProvider:       p.audioProviderName(),
 		ImageProvider:       imageProvider,
-		OpenAIKey:           cli.GetOpenAIKey(),
-		GoogleAPIKey:        cli.GetGoogleAPIKey(),
+		OpenAIKey:           openAIKey,
+		GoogleAPIKey:        googleAPIKey,
 		NanoBananaModel:     p.nanoBananaModelForRunMode(),
 		NanoBananaTextModel: p.nanoBananaTextModelForRunMode(),
 		GeminiTTSModel:      p.geminiTTSModel(),
 		GeminiVoice:         p.geminiVoice(),
-		TranslationProvider: translation.Provider(viper.GetString("translation.provider")),
-		PhoneticProvider:    phonetic.Provider(viper.GetString("phonetic.provider")),
+		TranslationProvider: translationProvider,
+		PhoneticProvider:    phoneticProvider,
 		AutoPlay:            !p.flags.NoAutoPlay, // Invert the flag (--no-auto-play disables auto-play)
+		PhoneticFetcher:     phoneticFetcher,
+		Translator:          translator,
 	}
 }