feat: add Edge TTS rate/pitch sliders to voice settings (#629)

Add speed (rate) and pitch controls for Edge TTS provider:
- Frontend: speedToEdgeRate()/hzToEdgePitch() helpers + UI sliders
- Backend: rate/pitch passthrough in OpenaiTtsRequest and controller
- i18n: add edgeRate/edgePitch keys across all 8 languages
- Rate: 0.5x-2.0x slider, Pitch: -20Hz to +20Hz slider

packages/client/src/i18n/locales/de.ts

@@ -630,6 +630,11 @@ jobTriggered: 'Job ausgelost',
       edgeUrlPlaceholder: 'http://127.0.0.1:9882',
       edgeVoice: 'Stimme',
       edgeVoiceHint: 'Waehlen Sie eine Stimme fuer die Sprachsynthese',
+      edgeRate: 'Geschwindigkeit',
+      edgeRateHint: 'Sprachgeschwindigkeit anpassen (0,5x ~ 2,0x)',
+      edgePitch: 'Tonhöhe',
+      edgePitchHint: 'Tonhöhe anpassen (-20 ~ +20 Hz)',
+
 
       // Test
       testTitle: 'Sprachtest',

packages/client/src/i18n/locales/en.ts

@@ -793,6 +793,11 @@ export default {
       edgeUrlPlaceholder: 'http://127.0.0.1:9882',
       edgeVoice: 'Voice',
       edgeVoiceHint: 'Select a voice for speech synthesis',
+      edgeRate: 'Speed',
+      edgeRateHint: 'Adjust speech speed (0.5x ~ 2.0x)',
+      edgePitch: 'Pitch',
+      edgePitchHint: 'Adjust speech pitch (-20 ~ +20 Hz)',
+
 
       // Test
       testTitle: 'Test Voice',

packages/client/src/i18n/locales/es.ts

@@ -630,6 +630,11 @@ jobTriggered: 'Job ejecutado',
       edgeUrlPlaceholder: 'http://127.0.0.1:9882',
       edgeVoice: 'Voz',
       edgeVoiceHint: 'Seleccione una voz para la sintesis de voz',
+      edgeRate: 'Velocidad',
+      edgeRateHint: 'Ajustar velocidad del habla (0.5x ~ 2.0x)',
+      edgePitch: 'Tono',
+      edgePitchHint: 'Ajustar tono del habla (-20 ~ +20 Hz)',
+
 
       // Test
       testTitle: 'Prueba de voz',

packages/client/src/i18n/locales/fr.ts

@@ -630,6 +630,11 @@ jobTriggered: 'Job declenche',
       edgeUrlPlaceholder: 'http://127.0.0.1:9882',
       edgeVoice: 'Voix',
       edgeVoiceHint: 'Choisir une voix pour la synthese vocale',
+      edgeRate: 'Vitesse',
+      edgeRateHint: "Ajuster la vitesse de la voix (0.5x ~ 2.0x)",
+      edgePitch: 'Hauteur',
+      edgePitchHint: "Ajuster la hauteur de la voix (-20 ~ +20 Hz)",
+
 
       // Test
       testTitle: 'Test vocal',

packages/client/src/i18n/locales/ja.ts

@@ -630,6 +630,11 @@ export default {
       edgeUrlPlaceholder: 'http://127.0.0.1:9882',
       edgeVoice: '音色',
       edgeVoiceHint: '音声合成に使用する音色を選択',
+      edgeRate: '速度',
+      edgeRateHint: '音声の速度を調整（0.5～2.0倍）',
+      edgePitch: 'ピッチ',
+      edgePitchHint: '音声のピッチを調整（-20～+20 Hz）',
+
 
       // Test
       testTitle: '音声テスト',

packages/client/src/i18n/locales/ko.ts

@@ -630,6 +630,11 @@ export default {
       edgeUrlPlaceholder: 'http://127.0.0.1:9882',
       edgeVoice: '음색',
       edgeVoiceHint: '음성 합성에 사용할 음색 선택',
+      edgeRate: '속도',
+      edgeRateHint: '음성 속도 조절 (0.5~2.0배)',
+      edgePitch: '음높이',
+      edgePitchHint: '음성 음높이 조절 (-20~+20 Hz)',
+
 
       // Test
       testTitle: '음성 테스트',

packages/client/src/i18n/locales/pt.ts

@@ -630,6 +630,11 @@ jobTriggered: 'Job acionado',
       edgeUrlPlaceholder: 'http://127.0.0.1:9882',
       edgeVoice: 'Voz',
       edgeVoiceHint: 'Selecione uma voz para sintese de fala',
+      edgeRate: 'Velocidade',
+      edgeRateHint: 'Ajustar velocidade da fala (0.5x ~ 2.0x)',
+      edgePitch: 'Tom',
+      edgePitchHint: 'Ajustar tom da fala (-20 ~ +20 Hz)',
+
 
       // Test
       testTitle: 'Teste de voz',

packages/client/src/i18n/locales/zh.ts

@@ -785,6 +785,11 @@ export default {
       edgeUrlPlaceholder: 'http://127.0.0.1:9882',
       edgeVoice: '音色',
       edgeVoiceHint: '选择用于语音合成的音色',
+      edgeRate: '语速',
+      edgeRateHint: '调整语音速度（0.5～2.0 倍）',
+      edgePitch: '音调',
+      edgePitchHint: '调整语音音调（-20～+20 Hz）',
+
 
       // 试听
       testTitle: '试听测试',