feat: add Chatterbox TTS engine for multilingual voice cloning

- New ChatterboxTTSBackend wrapping ChatterboxMultilingualTTS (ResembleAI/chatterbox)
- Supports 23 languages including Hebrew, forces CPU on macOS (MPS issue)
- Monkey-patches torch.load for CPU loading, forces eager attention for compatibility
- trim_tts_output utility cuts trailing silence/hallucination from Chatterbox output
- Full engine integration: /generate, /generate/stream, model status/download/delete
- Hebrew (he) added to supported languages in frontend and backend validation
- Single flat model dropdown extended with Chatterbox option in both generation UIs
- ModelManagement UI groups LuxTTS and Chatterbox under 'Other Voice Models' section

app/src/lib/api/types.ts

@@ -34,7 +34,7 @@ export interface GenerationRequest {
   language: LanguageCode;
   seed?: number;
   model_size?: '1.7B' | '0.6B';
-  engine?: 'qwen' | 'luxtts';
+  engine?: 'qwen' | 'luxtts' | 'chatterbox';
   instruct?: string;
 }
 
@@ -119,12 +119,29 @@ export interface ModelProgress {
 export interface ModelStatus {
   model_name: string;
   display_name: string;
+  hf_repo_id?: string; // HuggingFace repository ID
   downloaded: boolean;
   downloading: boolean; // True if download is in progress
   size_mb?: number;
   loaded: boolean;
 }
 
+export interface HuggingFaceModelInfo {
+  id: string;
+  author: string;
+  lastModified: string;
+  pipeline_tag?: string;
+  library_name?: string;
+  downloads: number;
+  likes: number;
+  tags: string[];
+  cardData?: {
+    license?: string;
+    language?: string[];
+    pipeline_tag?: string;
+  };
+}
+
 export interface ModelStatusListResponse {
   models: ModelStatus[];
 }

app/src/lib/constants/languages.ts

@@ -1,6 +1,6 @@
 /**
- * Supported languages for Qwen3-TTS
- * Based on: https://github.com/QwenLM/Qwen3-TTS
+ * Supported languages for voice generation.
+ * Most languages use Qwen3-TTS; Hebrew uses Chatterbox TTS.
  */
 
 export const SUPPORTED_LANGUAGES = {
@@ -14,6 +14,7 @@ export const SUPPORTED_LANGUAGES = {
   pt: 'Portuguese',
   es: 'Spanish',
   it: 'Italian',
+  he: 'Hebrew',
 } as const;
 
 export type LanguageCode = keyof typeof SUPPORTED_LANGUAGES;

app/src/lib/hooks/useGenerationForm.ts

@@ -16,7 +16,7 @@ const generationSchema = z.object({
   seed: z.number().int().optional(),
   modelSize: z.enum(['1.7B', '0.6B']).optional(),
   instruct: z.string().max(500).optional(),
-  engine: z.enum(['qwen', 'luxtts']).optional(),
+  engine: z.enum(['qwen', 'luxtts', 'chatterbox']).optional(),
 });
 
 export type GenerationFormValues = z.infer<typeof generationSchema>;
@@ -70,13 +70,20 @@ export function useGenerationForm(options: UseGenerationFormOptions = {}) {
       setIsGenerating(true);
 
       const engine = data.engine || 'qwen';
-      const modelName = engine === 'luxtts' ? 'luxtts' : `qwen-tts-${data.modelSize}`;
+      const modelName =
+        engine === 'luxtts'
+          ? 'luxtts'
+          : engine === 'chatterbox'
+            ? 'chatterbox-tts'
+            : `qwen-tts-${data.modelSize}`;
       const displayName =
         engine === 'luxtts'
           ? 'LuxTTS'
-          : data.modelSize === '1.7B'
-            ? 'Qwen TTS 1.7B'
-            : 'Qwen TTS 0.6B';
+          : engine === 'chatterbox'
+            ? 'Chatterbox TTS'
+            : data.modelSize === '1.7B'
+              ? 'Qwen TTS 1.7B'
+              : 'Qwen TTS 0.6B';
 
       try {
         const modelStatus = await apiClient.getModelStatus();
@@ -90,14 +97,15 @@ export function useGenerationForm(options: UseGenerationFormOptions = {}) {
         console.error('Failed to check model status:', error);
       }
 
+      const isQwen = engine === 'qwen';
       const result = await generation.mutateAsync({
         profile_id: selectedProfileId,
         text: data.text,
         language: data.language,
         seed: data.seed,
-        model_size: engine === 'luxtts' ? undefined : data.modelSize,
+        model_size: isQwen ? data.modelSize : undefined,
         engine,
-        instruct: engine === 'luxtts' ? undefined : data.instruct || undefined,
+        instruct: isQwen ? data.instruct || undefined : undefined,
       });
 
       toast({