Regenerate as new version, UI polish, and bugfixes

- Add /generate/{id}/regenerate endpoint that creates a new take version
- Wire regenerate into history dropdown with SSE progress + autoplay
- Add normalize_audio to regenerate path
- Remove duplicate Regenerate menu item
- Show disabled ellipsis menu during generation instead of hiding it
- Fix sf.write format kwarg broken by asyncio.to_thread migration
- Rename clean version label to 'original', effects to 'version-N'
- Show effects chain names in version list instead of 'N fx'
- Include all versions in export package
- Clean up version panel padding

app/src/components/AudioPlayer/AudioPlayer.tsx

@@ -157,8 +157,21 @@ export function AudioPlayer() {
       const wavesurfer = wavesurferRef.current;
       if (!wavesurfer) return;
 
-      // Update store when time changes
+      // Update store when time changes, stop if past duration
       wavesurfer.on('timeupdate', (time) => {
+        const dur = usePlayerStore.getState().duration;
+        if (dur > 0 && time >= dur) {
+          setCurrentTime(dur);
+          const loop = usePlayerStore.getState().isLooping;
+          if (loop) {
+            wavesurfer.seekTo(0);
+            wavesurfer.play();
+          } else {
+            wavesurfer.pause();
+            setIsPlaying(false);
+          }
+          return;
+        }
         setCurrentTime(time);
       });
 

app/src/components/History/HistoryTable.tsx

@@ -224,6 +224,20 @@ export function HistoryTable() {
     }
   };
 
+  const handleRegenerate = async (generationId: string) => {
+    try {
+      await apiClient.regenerateGeneration(generationId);
+      addPendingGeneration(generationId);
+      queryClient.invalidateQueries({ queryKey: ['history'] });
+    } catch (error) {
+      toast({
+        title: 'Regenerate failed',
+        description: error instanceof Error ? error.message : 'Could not regenerate',
+        variant: 'destructive',
+      });
+    }
+  };
+
   const handleApplyEffects = (generationId: string) => {
     setEffectsTargetId(generationId);
     setEffectsChain([]);
@@ -457,7 +471,7 @@ export function HistoryTable() {
                         >
                           <RotateCcw className="h-4 w-4" />
                         </Button>
-                      ) : isPlayable ? (
+                      ) : (
                         <>
                           <DropdownMenu>
                             <DropdownMenuTrigger asChild>
@@ -466,6 +480,7 @@ export function HistoryTable() {
                                 size="icon"
                                 className="h-8 w-8"
                                 aria-label="Actions"
+                                disabled={isGenerating}
                               >
                                 <MoreHorizontal className="h-4 w-4" />
                               </Button>
@@ -495,6 +510,10 @@ export function HistoryTable() {
                                 <Wand2 className="mr-2 h-4 w-4" />
                                 Apply Effects
                               </DropdownMenuItem>
+                              <DropdownMenuItem onClick={() => handleRegenerate(gen.id)}>
+                                <RotateCcw className="mr-2 h-4 w-4" />
+                                Regenerate
+                              </DropdownMenuItem>
                               <DropdownMenuItem
                                 onClick={() => handleDeleteClick(gen.id, gen.profile_name)}
                                 disabled={deleteGeneration.isPending}
@@ -519,7 +538,7 @@ export function HistoryTable() {
                             </Button>
                           )}
                         </>
-                      ) : null}
+                      )}
                     </div>
                   </div>
 
@@ -533,13 +552,13 @@ export function HistoryTable() {
                         transition={{ duration: 0.2, ease: 'easeOut' }}
                         className="overflow-hidden"
                       >
-                        <div className="border-t border-border/50 px-3 pb-2 pt-2">
+                        <div className="border-t border-border/50">
                           <div className="divide-y divide-border/40">
                             {gen.versions.map((v) => (
                               <button
                                 key={v.id}
                                 type="button"
-                                className="flex items-center gap-2 w-full h-9 px-2 text-left hover:bg-muted/50 transition-colors"
+                                className="flex items-center gap-2 w-full h-9 px-3 text-left hover:bg-muted/50 transition-colors"
                                 onClick={() => {
                                   handlePlayVersion(gen.id, v.id, gen.text, gen.profile_id);
                                   if (!v.is_default) {
@@ -550,8 +569,8 @@ export function HistoryTable() {
                                 <Play className="h-3 w-3 shrink-0 text-muted-foreground" />
                                 <span className="truncate text-xs font-medium">{v.label}</span>
                                 {v.effects_chain && v.effects_chain.length > 0 && (
-                                  <span className="text-[10px] text-muted-foreground">
+                                  <span className="text-[10px] text-muted-foreground truncate">
-                                    {v.effects_chain.length} fx
+                                    {v.effects_chain.map((e) => e.type).join(' → ')}
                                   </span>
                                 )}
                                 <span className="flex-1" />

app/src/lib/api/client.ts

@@ -212,6 +212,12 @@ class ApiClient {
     });
   }
 
+  async regenerateGeneration(generationId: string): Promise<GenerationResponse> {
+    return this.request<GenerationResponse>(`/generate/${generationId}/regenerate`, {
+      method: 'POST',
+    });
+  }
+
   // History
   async listHistory(query?: HistoryQuery): Promise<HistoryListResponse> {
     const params = new URLSearchParams();

backend/export_import.py

@@ -13,7 +13,7 @@ from typing import Optional
 from sqlalchemy.orm import Session
 
 from .models import VoiceProfileResponse
-from .database import VoiceProfile as DBVoiceProfile, ProfileSample as DBProfileSample, Generation as DBGeneration
+from .database import VoiceProfile as DBVoiceProfile, ProfileSample as DBProfileSample, Generation as DBGeneration, GenerationVersion as DBGenerationVersion
 from .profiles import create_profile, add_profile_sample
 from .models import VoiceProfileCreate
 from . import config
@@ -269,16 +269,33 @@ def export_generation_to_zip(generation_id: str, db: Session) -> bytes:
     if not profile:
         raise ValueError(f"Profile {generation.profile_id} not found")
     
-    # Get audio file
+    # Get all versions for this generation
-    audio_path = Path(generation.audio_path)
+    versions = (
-    if not audio_path.exists():
+        db.query(DBGenerationVersion)
-        raise ValueError(f"Audio file not found: {audio_path}")
+        .filter_by(generation_id=generation_id)
+        .order_by(DBGenerationVersion.created_at)
+        .all()
+    )
 
     # Create ZIP in memory
     zip_buffer = io.BytesIO()
     
     with zipfile.ZipFile(zip_buffer, 'w', zipfile.ZIP_DEFLATED) as zip_file:
-        # Create manifest.json
+        # Build version manifest entries
+        version_entries = []
+        for v in versions:
+            v_path = Path(v.audio_path)
+            effects_chain = None
+            if v.effects_chain:
+                effects_chain = json.loads(v.effects_chain)
+            version_entries.append({
+                "id": v.id,
+                "label": v.label,
+                "is_default": v.is_default,
+                "effects_chain": effects_chain,
+                "filename": v_path.name,
+            })
+
         manifest = {
             "version": "1.0",
             "generation": {
@@ -295,13 +312,22 @@ def export_generation_to_zip(generation_id: str, db: Session) -> bytes:
                 "name": profile.name,
                 "description": profile.description,
                 "language": profile.language,
-            }
+            },
+            "versions": version_entries,
         }
         zip_file.writestr("manifest.json", json.dumps(manifest, indent=2))
         
-        # Add audio file
+        # Add all version audio files
-        filename = audio_path.name
+        for v in versions:
-        zip_file.write(audio_path, f"audio/{filename}")
+            v_path = Path(v.audio_path)
+            if v_path.exists():
+                zip_file.write(v_path, f"audio/{v_path.name}")
+
+        # Fallback: if no versions exist, include the generation's main audio
+        if not versions:
+            audio_path = Path(generation.audio_path)
+            if audio_path.exists():
+                zip_file.write(audio_path, f"audio/{audio_path.name}")
     
     zip_buffer.seek(0)
     return zip_buffer.read()

backend/main.py

@@ -828,7 +828,7 @@ async def generate_speech(
             # Create clean version entry
             versions_mod.create_version(
                 generation_id=generation_id,
-                label="clean",
+                label="original",
                 audio_path=str(clean_audio_path),
                 db=bg_db,
                 effects_chain=None,
@@ -849,7 +849,7 @@ async def generate_speech(
                     final_audio_path = str(processed_path)
                     versions_mod.create_version(
                         generation_id=generation_id,
-                        label="processed",
+                        label="version-2",
                         audio_path=str(processed_path),
                         db=bg_db,
                         effects_chain=effects_chain_config,
@@ -978,6 +978,118 @@ async def retry_generation(generation_id: str, db: Session = Depends(get_db)):
     return models.GenerationResponse.model_validate(gen)
 
 
+@app.post(
+    "/generate/{generation_id}/regenerate",
+    response_model=models.GenerationResponse,
+)
+async def regenerate_generation(generation_id: str, db: Session = Depends(get_db)):
+    """Re-run TTS with the same parameters and save the result as a new version."""
+    gen = db.query(DBGeneration).filter_by(id=generation_id).first()
+    if not gen:
+        raise HTTPException(status_code=404, detail="Generation not found")
+    if (gen.status or "completed") != "completed":
+        raise HTTPException(status_code=400, detail="Generation must be completed to regenerate")
+
+    from .backends import get_tts_backend_for_engine
+    from . import versions as versions_mod
+
+    regen_engine = gen.engine or "qwen"
+    regen_model_size = gen.model_size or "1.7B"
+    tts_model = get_tts_backend_for_engine(regen_engine)
+
+    # Set to generating so the UI shows the loader and SSE picks it up
+    gen.status = "generating"
+    gen.error = None
+    db.commit()
+    db.refresh(gen)
+
+    task_manager = get_task_manager()
+    task_manager.start_generation(
+        task_id=generation_id,
+        profile_id=gen.profile_id,
+        text=gen.text,
+    )
+
+    version_id = str(uuid.uuid4())
+
+    async def _run_regenerate():
+        bg_db = next(get_db())
+        try:
+            if regen_engine == "qwen":
+                await tts_model.load_model_async(regen_model_size)
+            else:
+                await tts_model.load_model()
+
+            voice_prompt = await profiles.create_voice_prompt_for_profile(
+                gen.profile_id,
+                bg_db,
+                use_cache=True,
+                engine=regen_engine,
+            )
+
+            from .utils.chunked_tts import generate_chunked
+
+            trim_fn = None
+            if regen_engine in ("chatterbox", "chatterbox_turbo"):
+                from .utils.audio import trim_tts_output
+                trim_fn = trim_tts_output
+
+            audio, sample_rate = await generate_chunked(
+                tts_model,
+                gen.text,
+                voice_prompt,
+                language=gen.language,
+                seed=None,  # New seed for variation
+                instruct=gen.instruct,
+                trim_fn=trim_fn,
+            )
+
+            from .utils.audio import normalize_audio, save_audio
+            audio = normalize_audio(audio)
+
+            duration = len(audio) / sample_rate
+            audio_path = config.get_generations_dir() / f"{generation_id}_{version_id[:8]}.wav"
+
+            save_audio(audio, str(audio_path), sample_rate)
+
+            # Count existing versions to auto-label
+            existing = versions_mod.list_versions(generation_id, bg_db)
+            label = f"take-{len(existing) + 1}"
+
+            versions_mod.create_version(
+                generation_id=generation_id,
+                label=label,
+                audio_path=str(audio_path),
+                db=bg_db,
+                effects_chain=None,
+                is_default=True,
+            )
+
+            await history.update_generation_status(
+                generation_id=generation_id,
+                status="completed",
+                db=bg_db,
+                audio_path=str(audio_path),
+                duration=duration,
+            )
+        except Exception as e:
+            import traceback
+            traceback.print_exc()
+            await history.update_generation_status(
+                generation_id=generation_id,
+                status="failed",
+                db=bg_db,
+                error=str(e),
+            )
+        finally:
+            task_manager.complete_generation(generation_id)
+            bg_db.close()
+
+    _enqueue_generation(_run_regenerate())
+
+    return models.GenerationResponse.model_validate(gen)
+
+
 @app.get("/generate/{generation_id}/status")
 async def get_generation_status(generation_id: str, db: Session = Depends(get_db)):
     """SSE endpoint that streams generation status updates.
@@ -1599,7 +1711,7 @@ async def preview_effects(
     # Write to in-memory buffer
     import soundfile as sf
     buf = io.BytesIO()
-    await asyncio.to_thread(sf.write, buf, processed, sample_rate, "WAV")
+    await asyncio.to_thread(lambda: sf.write(buf, processed, sample_rate, format="WAV"))
     buf.seek(0)
 
     return StreamingResponse(