feat: add style selection for TTS and update related functionality

internal/http/handlers/tts.go

@@ -153,6 +153,7 @@ func (h *TTSHandler) HandleTTS(w http.ResponseWriter, r *http.Request) {
 			Voice: q.Get("v"),
 			Rate:  q.Get("r"),
 			Pitch: q.Get("p"),
+			Style: q.Get("s"),
 		}
 	case http.MethodPost:
 		// 从POST JSON体获取
@@ -174,6 +175,7 @@ func (h *TTSHandler) HandleTTS(w http.ResponseWriter, r *http.Request) {
 				Voice: r.FormValue("voice"),
 				Rate:  r.FormValue("rate"),
 				Pitch: r.FormValue("pitch"),
+				Style: r.FormValue("style"),
 			}
 		}
 	default:

internal/models/tts.go

@@ -6,6 +6,7 @@ type TTSRequest struct {
 	Voice string `json:"voice"` // 语音ID
 	Rate  string `json:"rate"`  // 语速 (-100% 到 +100%)
 	Pitch string `json:"pitch"` // 语调 (-100% 到 +100%)
+	Style string `json:"style"` // 说话风格
 }
 
 // TTSResponse 表示一个语音合成响应

internal/tts/microsoft/client.go

@@ -25,7 +25,7 @@ const (
 	ttsEndpoint    = "https://%s.tts.speech.microsoft.com/cognitiveservices/v1"
 	ssmlTemplate   = `<speak version='1.0' xmlns='http://www.w3.org/2001/10/synthesis' xmlns:mstts="http://www.w3.org/2001/mstts" xml:lang='%s'>
     <voice name='%s'>
-        <mstts:express-as style="general" styledegree="1.0" role="default">
+        <mstts:express-as style="%s" styledegree="1.0" role="default">
             <prosody rate='%s%%' pitch='%s%%' volume="medium">
                 %s
             </prosody>
@@ -227,6 +227,11 @@ func (c *Client) createTTSRequest(ctx context.Context, req models.TTSRequest) (*
 		voice = c.defaultVoice
 	}
 
+	style := req.Style
+	if req.Style == "" {
+		style = "general"
+	}
+
 	rate := req.Rate
 	if rate == "" {
 		rate = c.defaultRate
@@ -249,7 +254,7 @@ func (c *Client) createTTSRequest(ctx context.Context, req models.TTSRequest) (*
 	escapedText := html.EscapeString(req.Text)
 
 	// 准备SSML内容
-	ssml := fmt.Sprintf(ssmlTemplate, locale, voice, rate, pitch, escapedText)
+	ssml := fmt.Sprintf(ssmlTemplate, locale, voice, style, rate, pitch, escapedText)
 
 	// 获取端点信息
 	endpoint, err := c.getEndpoint(ctx)