Enhance contribution guidelines and improve FloatingGenerateBox component

- Updated CONTRIBUTING.md to include instructions for building with a local Qwen3-TTS development version, facilitating easier testing and development.
- Refactored FloatingGenerateBox component to streamline the rendering of text and instruct fields, improving code readability and maintainability.
- Added functionality to handle auto-resizing of text areas based on content changes, enhancing user experience.
- Improved event handling for keyboard interactions in StoryTrackEditor, allowing for play/pause functionality with the spacebar.
- Introduced a MiniSamplePlayer component in SampleList for better audio playback control, including play, pause, and seek features.
- Implemented sample update functionality in the backend, allowing users to edit reference text for audio samples, with appropriate error handling and user feedback.

app/src/components/VoiceProfiles/SampleList.tsx

@@ -1,11 +1,132 @@
-import { Plus, Trash2, Play } from 'lucide-react';
-import { useState } from 'react';
+import { Plus, Trash2, Play, Pencil, Check, X, Volume2, Pause } from 'lucide-react';
+import { useEffect, useRef, useState } from 'react';
 import { Button } from '@/components/ui/button';
+import { Textarea } from '@/components/ui/textarea';
+import { Slider } from '@/components/ui/slider';
+import { useToast } from '@/components/ui/use-toast';
 import { apiClient } from '@/lib/api/client';
-import { useDeleteSample, useProfileSamples } from '@/lib/hooks/useProfiles';
-import { usePlayerStore } from '@/stores/playerStore';
+import { useDeleteSample, useProfileSamples, useUpdateSample } from '@/lib/hooks/useProfiles';
+import { formatAudioDuration } from '@/lib/utils/audio';
+import { cn } from '@/lib/utils/cn';
 import { SampleUpload } from './SampleUpload';
 
+interface MiniSamplePlayerProps {
+  audioUrl: string;
+}
+
+function MiniSamplePlayer({ audioUrl }: MiniSamplePlayerProps) {
+  const audioRef = useRef<HTMLAudioElement | null>(null);
+  const [isPlaying, setIsPlaying] = useState(false);
+  const [currentTime, setCurrentTime] = useState(0);
+  const [duration, setDuration] = useState(0);
+  const [isLoading, setIsLoading] = useState(true);
+
+  useEffect(() => {
+    const audio = new Audio(audioUrl);
+    audioRef.current = audio;
+
+    const handleLoadedMetadata = () => {
+      setDuration(audio.duration);
+      setIsLoading(false);
+    };
+
+    const handleTimeUpdate = () => {
+      setCurrentTime(audio.currentTime);
+    };
+
+    const handleEnded = () => {
+      setIsPlaying(false);
+      setCurrentTime(0);
+    };
+
+    const handlePlay = () => setIsPlaying(true);
+    const handlePause = () => setIsPlaying(false);
+
+    audio.addEventListener('loadedmetadata', handleLoadedMetadata);
+    audio.addEventListener('timeupdate', handleTimeUpdate);
+    audio.addEventListener('ended', handleEnded);
+    audio.addEventListener('play', handlePlay);
+    audio.addEventListener('pause', handlePause);
+
+    return () => {
+      audio.pause();
+      audio.removeEventListener('loadedmetadata', handleLoadedMetadata);
+      audio.removeEventListener('timeupdate', handleTimeUpdate);
+      audio.removeEventListener('ended', handleEnded);
+      audio.removeEventListener('play', handlePlay);
+      audio.removeEventListener('pause', handlePause);
+      audio.src = '';
+    };
+  }, [audioUrl]);
+
+  const handlePlayPause = () => {
+    if (!audioRef.current) return;
+    if (isPlaying) {
+      audioRef.current.pause();
+    } else {
+      audioRef.current.play();
+    }
+  };
+
+  const handleSeek = (value: number[]) => {
+    if (!audioRef.current || duration === 0) return;
+    const progress = value[0] / 100;
+    audioRef.current.currentTime = progress * duration;
+  };
+
+  const handleStop = () => {
+    if (audioRef.current) {
+      audioRef.current.pause();
+      audioRef.current.currentTime = 0;
+    }
+    setIsPlaying(false);
+    setCurrentTime(0);
+  };
+
+  return (
+    <div className="border-t bg-muted/30 px-3 py-2 mt-2">
+      <div className="flex items-center gap-2">
+        <Button
+          type="button"
+          variant="ghost"
+          size="icon"
+          className="h-7 w-7 shrink-0"
+          onClick={handlePlayPause}
+          disabled={isLoading}
+        >
+          {isPlaying ? <Pause className="h-3.5 w-3.5" /> : <Play className="h-3.5 w-3.5 ml-0.5" />}
+        </Button>
+
+        <div className="flex-1 min-w-0 flex items-center gap-2">
+          <Slider
+            value={duration > 0 ? [(currentTime / duration) * 100] : [0]}
+            onValueChange={handleSeek}
+            max={100}
+            step={0.1}
+            className="flex-1"
+          />
+          <div className="flex items-center gap-1 text-xs text-muted-foreground shrink-0 min-w-[70px]">
+            <span className="font-mono">{formatAudioDuration(currentTime)}</span>
+            <span>/</span>
+            <span className="font-mono">{formatAudioDuration(duration)}</span>
+          </div>
+        </div>
+
+        <Button
+          type="button"
+          variant="ghost"
+          size="icon"
+          className="h-7 w-7 shrink-0"
+          onClick={handleStop}
+          title="Stop"
+        >
+          <X className="h-3.5 w-3.5" />
+        </Button>
+      </div>
+    </div>
+  );
+}
+
 interface SampleListProps {
   profileId: string;
 }
@@ -13,10 +134,11 @@ interface SampleListProps {
 export function SampleList({ profileId }: SampleListProps) {
   const { data: samples, isLoading } = useProfileSamples(profileId);
   const deleteSample = useDeleteSample();
+  const updateSample = useUpdateSample();
+  const { toast } = useToast();
   const [uploadOpen, setUploadOpen] = useState(false);
-  const setAudioWithAutoPlay = usePlayerStore((state) => state.setAudioWithAutoPlay);
-  const currentAudioId = usePlayerStore((state) => state.audioId);
-  const isPlaying = usePlayerStore((state) => state.isPlaying);
+  const [editingSampleId, setEditingSampleId] = useState<string | null>(null);
+  const [editedText, setEditedText] = useState<string>('');
 
   const handleDelete = (sampleId: string) => {
     if (confirm('Are you sure you want to delete this sample?')) {
@@ -24,9 +146,41 @@ export function SampleList({ profileId }: SampleListProps) {
     }
   };
 
-  const handlePlay = (referenceText: string, sampleId: string) => {
-    const audioUrl = apiClient.getSampleUrl(sampleId);
-    setAudioWithAutoPlay(audioUrl, sampleId, null, referenceText.substring(0, 50));
+  const handleStartEdit = (sampleId: string, currentText: string) => {
+    setEditingSampleId(sampleId);
+    setEditedText(currentText);
+  };
+
+  const handleCancelEdit = () => {
+    setEditingSampleId(null);
+    setEditedText('');
+  };
+
+  const handleSaveEdit = async (sampleId: string) => {
+    if (!editedText.trim()) {
+      toast({
+        title: 'Invalid text',
+        description: 'Reference text cannot be empty.',
+        variant: 'destructive',
+      });
+      return;
+    }
+
+    try {
+      await updateSample.mutateAsync({ sampleId, referenceText: editedText.trim() });
+      toast({
+        title: 'Sample updated',
+        description: 'Reference text has been updated successfully.',
+      });
+      setEditingSampleId(null);
+      setEditedText('');
+    } catch (error) {
+      toast({
+        title: 'Update failed',
+        description: error instanceof Error ? error.message : 'Failed to update sample',
+        variant: 'destructive',
+      });
+    }
   };
 
   if (isLoading) {
@@ -44,43 +198,109 @@ export function SampleList({ profileId }: SampleListProps) {
       </div>
 
       {samples && samples.length === 0 ? (
-        <div className="text-sm text-muted-foreground py-4">
-          No samples yet. Add your first audio sample.
+        <div className="flex flex-col items-center justify-center py-8 text-center border border-dashed rounded-lg">
+          <Volume2 className="h-8 w-8 text-muted-foreground/50 mb-2" />
+          <p className="text-sm text-muted-foreground">No samples yet</p>
+          <p className="text-xs text-muted-foreground/70 mt-1">Add your first audio sample to get started</p>
         </div>
       ) : (
         <div className="space-y-2">
-          {samples?.map((sample) => (
-            <div
-              key={sample.id}
-              className="flex items-center justify-between p-3 border rounded-lg"
-            >
-              <div className="flex-1">
-                <p className="text-sm font-medium">{sample.reference_text}</p>
-                <p className="text-xs text-muted-foreground mt-1">{sample.audio_path}</p>
+          {samples?.map((sample, index) => {
+            const isEditing = editingSampleId === sample.id;
+
+            return (
+              <div
+                key={sample.id}
+                className={cn(
+                  'group relative rounded-lg border bg-card transition-all duration-200',
+                  isEditing ? 'ring-2 ring-primary/20' : 'hover:border-primary/30'
+                )}
+              >
+                {isEditing ? (
+                  /* Edit Mode */
+                  <div className="p-4 space-y-3">
+                    <div className="flex items-center gap-2 text-xs text-muted-foreground mb-2">
+                      <Pencil className="h-3 w-3" />
+                      <span>Editing transcription</span>
+                    </div>
+                    <Textarea
+                      value={editedText}
+                      onChange={(e) => setEditedText(e.target.value)}
+                      className="min-h-[100px] text-sm resize-none"
+                      placeholder="Enter reference text..."
+                      autoFocus
+                    />
+                    <div className="flex items-center justify-end gap-2 pt-1">
+                      <Button
+                        type="button"
+                        size="sm"
+                        variant="ghost"
+                        onClick={handleCancelEdit}
+                        disabled={updateSample.isPending}
+                      >
+                        <X className="h-4 w-4 mr-1" />
+                        Cancel
+                      </Button>
+                      <Button
+                        type="button"
+                        size="sm"
+                        onClick={() => handleSaveEdit(sample.id)}
+                        disabled={updateSample.isPending}
+                      >
+                        <Check className="h-4 w-4 mr-1" />
+                        {updateSample.isPending ? 'Saving...' : 'Save'}
+                      </Button>
+                    </div>
+                  </div>
+                ) : (
+                  <>
+                    {/* View Mode */}
+                    <div className="flex items-center gap-3 p-3 h-[72px]">
+                      {/* Text Content */}
+                      <div className="flex-1 min-w-0 py-0.5">
+                        <p className="text-sm font-medium line-clamp-2 leading-snug">
+                          {sample.reference_text}
+                        </p>
+                      </div>
+
+                      {/* Action Buttons */}
+                      <div className="shrink-0 flex items-center gap-1 opacity-0 group-hover:opacity-100 transition-opacity">
+                        <Button
+                          type="button"
+                          variant="ghost"
+                          size="icon"
+                          className="h-8 w-8"
+                          title="Edit transcription"
+                          onClick={() => handleStartEdit(sample.id, sample.reference_text)}
+                        >
+                          <Pencil className="h-4 w-4" />
+                        </Button>
+                        <Button
+                          type="button"
+                          variant="ghost"
+                          size="icon"
+                          className="h-8 w-8 text-destructive hover:text-destructive"
+                          title="Delete sample"
+                          onClick={() => handleDelete(sample.id)}
+                          disabled={deleteSample.isPending}
+                        >
+                          <Trash2 className="h-4 w-4" />
+                        </Button>
+                      </div>
+
+                      {/* Sample Number Badge */}
+                      <div className="absolute top-1 right-2 text-[10px] text-muted-foreground/50 font-medium">
+                        #{index + 1}
+                      </div>
+                    </div>
+
+                    {/* Mini Player - Always visible */}
+                    <MiniSamplePlayer audioUrl={apiClient.getSampleUrl(sample.id)} />
+                  </>
+                )}
               </div>
-              <div className="flex gap-2">
-                <Button
-                  type="button"
-                  variant="ghost"
-                  size="sm"
-                  onClick={() => handlePlay(sample.reference_text, sample.id)}
-                  className={currentAudioId === sample.id && isPlaying ? 'text-primary' : ''}
-                >
-                  <Play className="h-4 w-4 mr-1" />
-                  Play
-                </Button>
-                <Button
-                  type="button"
-                  variant="ghost"
-                  size="sm"
-                  onClick={() => handleDelete(sample.id)}
-                  disabled={deleteSample.isPending}
-                >
-                  <Trash2 className="h-4 w-4 text-destructive" />
-                </Button>
-              </div>
-            </div>
-          ))}
+            );
+          })}
         </div>
       )}