feat: add Qwen CustomVoice preset engine

app/src/components/Generation/EngineModelSelector.tsx

@@ -19,6 +19,8 @@ import type { GenerationFormValues } from '@/lib/hooks/useGenerationForm';
 const ENGINE_OPTIONS = [
   { value: 'qwen:1.7B', label: 'Qwen3-TTS 1.7B', engine: 'qwen' },
   { value: 'qwen:0.6B', label: 'Qwen3-TTS 0.6B', engine: 'qwen' },
+  { value: 'qwen_custom_voice:1.7B', label: 'Qwen CustomVoice 1.7B', engine: 'qwen_custom_voice' },
+  { value: 'qwen_custom_voice:0.6B', label: 'Qwen CustomVoice 0.6B', engine: 'qwen_custom_voice' },
   { value: 'luxtts', label: 'LuxTTS', engine: 'luxtts' },
   { value: 'chatterbox', label: 'Chatterbox', engine: 'chatterbox' },
   { value: 'chatterbox_turbo', label: 'Chatterbox Turbo', engine: 'chatterbox_turbo' },
@@ -29,6 +31,7 @@ const ENGINE_OPTIONS = [
 
 const ENGINE_DESCRIPTIONS: Record<string, string> = {
   qwen: 'Multi-language, two sizes',
+  qwen_custom_voice: '9 preset voices, instruct control',
   luxtts: 'Fast, English-focused',
   chatterbox: '23 languages, incl. Hebrew',
   chatterbox_turbo: 'English, [laugh] [cough] tags',
@@ -49,12 +52,22 @@ function getAvailableOptions(selectedProfile?: VoiceProfileResponse | null) {
 
 function getSelectValue(engine: string, modelSize?: string): string {
   if (engine === 'qwen') return `qwen:${modelSize || '1.7B'}`;
+  if (engine === 'qwen_custom_voice') return `qwen_custom_voice:${modelSize || '1.7B'}`;
   if (engine === 'tada') return `tada:${modelSize || '1B'}`;
   return engine;
 }
 
 function handleEngineChange(form: UseFormReturn<GenerationFormValues>, value: string) {
-  if (value.startsWith('qwen:')) {
+  if (value.startsWith('qwen_custom_voice:')) {
+    const [, modelSize] = value.split(':');
+    form.setValue('engine', 'qwen_custom_voice');
+    form.setValue('modelSize', modelSize as '1.7B' | '0.6B');
+    const currentLang = form.getValues('language');
+    const available = getLanguageOptionsForEngine('qwen_custom_voice');
+    if (!available.some((l) => l.value === currentLang)) {
+      form.setValue('language', available[0]?.value ?? 'en');
+    }
+  } else if (value.startsWith('qwen:')) {
     const [, modelSize] = value.split(':');
     form.setValue('engine', 'qwen');
     form.setValue('modelSize', modelSize as '1.7B' | '0.6B');

app/src/components/Generation/GenerationForm.tsx

@@ -91,7 +91,7 @@ export function GenerationForm() {
               )}
             />
 
-            {form.watch('engine') === 'qwen' && (
+            {(form.watch('engine') === 'qwen' || form.watch('engine') === 'qwen_custom_voice') && (
               <FormField
                 control={form.control}
                 name="instruct"

app/src/components/ServerSettings/ModelManagement.tsx

@@ -68,6 +68,10 @@ const MODEL_DESCRIPTIONS: Record<string, string> = {
     'HumeAI TADA 3B Multilingual — built on Llama 3.2 3B. Supports 10 languages with high-fidelity voice cloning via text-acoustic dual alignment.',
   kokoro:
     'Kokoro 82M by hexgrad. Tiny 82M-parameter TTS that runs at CPU realtime. Supports 8 languages with pre-built voice styles. Apache 2.0 licensed.',
+  'qwen-custom-voice-1.7B':
+    'Qwen3-TTS CustomVoice 1.7B by Alibaba. 9 premium preset voices with instruct-based style control for tone, emotion, and prosody. Supports 10 languages.',
+  'qwen-custom-voice-0.6B':
+    'Qwen3-TTS CustomVoice 0.6B by Alibaba. Lightweight version with the same 9 preset voices and instruct control. Faster inference for lower-end hardware.',
   'whisper-base':
     'Smallest Whisper model (74M parameters). Fast transcription with moderate accuracy.',
   'whisper-small':
@@ -396,6 +400,7 @@ export function ModelManagement() {
     modelStatus?.models.filter(
       (m) =>
         m.model_name.startsWith('qwen-tts') ||
+        m.model_name.startsWith('qwen-custom-voice') ||
         m.model_name.startsWith('luxtts') ||
         m.model_name.startsWith('chatterbox') ||
         m.model_name.startsWith('tada') ||

app/src/components/VoiceProfiles/ProfileCard.tsx

@@ -17,6 +17,12 @@ import { useDeleteProfile, useExportProfile } from '@/lib/hooks/useProfiles';
 import { cn } from '@/lib/utils/cn';
 import { useUIStore } from '@/stores/uiStore';
 
+/** Human-readable display names for preset engine badges. */
+const ENGINE_DISPLAY_NAMES: Record<string, string> = {
+  kokoro: 'Kokoro',
+  qwen_custom_voice: 'CustomVoice',
+};
+
 interface ProfileCardProps {
   profile: VoiceProfileResponse;
 }
@@ -99,7 +105,7 @@ export function ProfileCard({ profile }: ProfileCardProps) {
             </Badge>
             {profile.voice_type === 'preset' && (
               <Badge variant="secondary" className="text-xs h-5 px-1.5">
-                {profile.preset_engine}
+                {ENGINE_DISPLAY_NAMES[profile.preset_engine ?? ''] ?? profile.preset_engine}
               </Badge>
             )}
             {profile.voice_type === 'designed' && (

app/src/components/VoiceProfiles/ProfileForm.tsx

@@ -60,9 +60,10 @@ import { AudioSampleUpload } from './AudioSampleUpload';
 import { SampleList } from './SampleList';
 
 const MAX_AUDIO_DURATION_SECONDS = 30;
-const PRESET_ONLY_ENGINES = new Set(['kokoro']);
+const PRESET_ONLY_ENGINES = new Set(['kokoro', 'qwen_custom_voice']);
 const DEFAULT_ENGINE_OPTIONS = [
   { value: 'qwen', label: 'Qwen3-TTS' },
+  { value: 'qwen_custom_voice', label: 'Qwen CustomVoice' },
   { value: 'luxtts', label: 'LuxTTS' },
   { value: 'chatterbox', label: 'Chatterbox' },
   { value: 'chatterbox_turbo', label: 'Chatterbox Turbo' },
@@ -849,6 +850,7 @@ export function ProfileForm() {
                               </FormControl>
                               <SelectContent>
                                 <SelectItem value="kokoro">Kokoro 82M</SelectItem>
+                                <SelectItem value="qwen_custom_voice">Qwen CustomVoice</SelectItem>
                               </SelectContent>
                             </Select>
                           </FormItem>

app/src/components/VoiceProfiles/ProfileList.tsx

@@ -7,11 +7,12 @@ import { ProfileCard } from './ProfileCard';
 import { ProfileForm } from './ProfileForm';
 
 /** Engines that use preset (built-in) voices instead of cloned profiles. */
-const PRESET_ENGINES = new Set(['kokoro']);
+const PRESET_ENGINES = new Set(['kokoro', 'qwen_custom_voice']);
 
 /** Human-readable engine names for empty state messages. */
 const ENGINE_NAMES: Record<string, string> = {
   kokoro: 'Kokoro',
+  qwen_custom_voice: 'Qwen CustomVoice',
 };
 
 export function ProfileList() {