refactor: consolidate provider factory test seams into shared named types

Define audio.ProviderFactory, image.PromptAwareClient,
image.OpenAIClientFactory, image.NanoBananaClientFactory, and
image.ClientFactories as the single source of truth for the three injectable
factory signatures that were previously duplicated across processor.Processor,
gui.Application, and gui.GenerationOrchestrator. Replace all three separate
function-type fields with imageFactories image.ClientFactories +
newAudioProvider audio.ProviderFactory, eliminating the parallel field
declarations and the local promptAwareImageClient interface in gui/generator.go.

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

1 files changed, 2 insertions, 2 deletions

diff --git a/internal/gui/generator_test.go b/internal/gui/generator_test.go
index c8bcf42..40c0e2c 100644
--- a/internal/gui/generator_test.go
+++ b/internal/gui/generator_test.go
@@ -107,7 +107,7 @@ func TestGenerateImagesWithPromptUsesNanoBananaProvider(t *testing.T) {
 		},
 		currentWord: "друго",
 	}
-	app.newNanoBananaImageClient = func(config *image.NanoBananaConfig) promptAwareImageClient {
+	app.imageFactories.NewNanoBananaClient = func(config *image.NanoBananaConfig) image.PromptAwareClient {
 		capturedConfig = &image.NanoBananaConfig{
 			APIKey:    config.APIKey,
 			Model:     config.Model,
@@ -115,7 +115,7 @@ func TestGenerateImagesWithPromptUsesNanoBananaProvider(t *testing.T) {
 		}
 		return fakeClient
 	}
-	app.newOpenAIImageClient = func(*image.OpenAIConfig) promptAwareImageClient {
+	app.imageFactories.NewOpenAIClient = func(*image.OpenAIConfig) image.PromptAwareClient {
 		t.Fatal("unexpected OpenAI image client construction")
 		return nil
 	}