Document markup and improve choice tags

public/js/elevenlabs-tts-module.js

@@ -177,7 +177,7 @@ export class ElevenLabsTTSModule extends ApiTTSModuleBase {
      * @param {string} text - Text to generate speech for
      * @returns {Promise<Object>} - Audio data object
      */
-    async generateSpeechAudio(text) {
+    async generateSpeechAudio(text, options = {}) {
         // Don't attempt to call the API if no API key is set or text is empty
         if (!text || !this.apiKey) {
             return { success: false, reason: 'missing_api_key_or_text' };
@@ -208,7 +208,8 @@ export class ElevenLabsTTSModule extends ApiTTSModuleBase {
                     'xi-api-key': this.apiKey,
                     'Accept': 'audio/mpeg'
                 },
-                body: JSON.stringify(payload)
+                body: JSON.stringify(payload),
+                signal: options.signal
             });
 
             if (!response.ok) {