Refactor TTS architecture

internal/config/config.go

@@ -11,11 +11,41 @@ import (
 	"code.chimeric.al/chimerical/odidere/internal/llm"
 	"code.chimeric.al/chimerical/odidere/internal/stt"
 	"code.chimeric.al/chimerical/odidere/internal/tool"
-	"code.chimeric.al/chimerical/odidere/internal/tts"
 
 	"gopkg.in/yaml.v3"
 )
 
+// TTS holds the configuration for TTS.
+type TTS struct {
+	// URL is the base URL of kokoro-fastapi.
+	// For example, "http://localhost:8880".
+	URL string `yaml:"url"`
+	// Voice is the default voice ID to use (e.g., "af_heart").
+	Voice string `yaml:"voice"`
+	// Timeout is the maximum duration for a synthesis request.
+	// Defaults to 60s if empty.
+	Timeout string `yaml:"timeout"`
+	// VoiceMap maps whisper language names to voice IDs.
+	// Used by SelectVoice to auto-select voices based on detected
+	// language.
+	VoiceMap map[string]string `yaml:"voice_map"`
+}
+
+func (cfg TTS) Validate() error {
+	if cfg.URL == "" {
+		return fmt.Errorf("missing URL")
+	}
+	if cfg.Voice == "" {
+		return fmt.Errorf("missing voice")
+	}
+	if cfg.Timeout != "" {
+		if _, err := time.ParseDuration(cfg.Timeout); err != nil {
+			return fmt.Errorf("invalid timeout: %w", err)
+		}
+	}
+	return nil
+}
+
 // Config holds all application configuration sections.
 type Config struct {
 	// Address is the host:port to listen on.
@@ -36,7 +66,7 @@ type Config struct {
 	// Tools defines external commands available to the LLM.
 	Tools []tool.Tool `yaml:"tools"`
 	// TTS configures the text-to-speech client.
-	TTS tts.Config `yaml:"tts"`
+	TTS TTS `yaml:"tts"`
 }
 
 // ApplyDefaults sets default values for optional configuration fields.