fix(avatar): declarative canvas element in JSX; remove manual DOM append

React was potentially clearing the canvas on re-render because we
appended it manually to a div. Now using a <canvas ref={canvasRef}>
element directly in JSX that React manages. Pixi app uses .
Scale set to 82% of container.

frontend/src/components/KiraAvatar.tsx

@@ -23,7 +23,7 @@ const OUTFIT_TEXTURES: Record<string, string> = {
 };
 
 export default function KiraAvatar(props: Props) {
-  const wrapRef = useRef<HTMLDivElement>(null);
+  const canvasRef = useRef<HTMLCanvasElement>(null);
   const modelRef = useRef<any>(null);
   const textureRef = useRef<any>(null);
   const lipSyncRef = useRef<number>(0);
@@ -32,11 +32,10 @@ export default function KiraAvatar(props: Props) {
   const [loadError, setLoadError] = useState(false);
   const [currentExpression, setCurrentExpression] = useState<ExpressionName>('Normal');
 
-  // Initialize Live2D
   useEffect(() => {
     let mounted = true;
-    const container = wrapRef.current;
-    if (!container) return;
+    const canvas = canvasRef.current;
+    if (!canvas) return;
 
     let app: any = null;
     let model: any = null;
@@ -51,8 +50,13 @@ export default function KiraAvatar(props: Props) {
         const { Live2DModel } = await import('pixi-live2d-display/cubism4');
         (Live2DModel as any).registerTicker(Ticker as any);
 
+        const w = canvas.clientWidth || 260;
+        const h = canvas.clientHeight || 320;
+
         app = new Application({
-          resizeTo: container,
+          view: canvas,
+          width: w,
+          height: h,
           antialias: true,
           resolution: Math.min(window.devicePixelRatio || 1, 2),
           backgroundAlpha: 0,
@@ -60,8 +64,6 @@ export default function KiraAvatar(props: Props) {
         });
         if (!mounted) { app.destroy(true); return; }
 
-        container.appendChild(app.view as HTMLCanvasElement);
-
         model = await Live2DModel.from('/live2d/models/kira/kira.model3.json', {
           autoInteract: false,
         });
@@ -70,9 +72,7 @@ export default function KiraAvatar(props: Props) {
         const fit = () => {
           const sw = app.screen.width;
           const sh = app.screen.height;
-          // Scale to fit within the container, leaving margin so nothing clips
-          const margin = 0.9; // 90% of container
-          const s = Math.min((sw * margin) / model.width, (sh * margin) / model.height);
+          const s = Math.min((sw * 0.82) / model.width, (sh * 0.82) / model.height);
           model.scale.set(s);
           model.anchor.set(0.5, 0.5);
           model.position.set(sw / 2, sh / 2);
@@ -82,9 +82,6 @@ export default function KiraAvatar(props: Props) {
         app.stage.addChild(model as any);
         (model as any).isInteractive = () => false;
 
-        // Re-fit on resize
-        app.renderer.on('resize', fit);
-
         try {
           textureRef.current = {
             index: 2,
@@ -191,10 +188,14 @@ export default function KiraAvatar(props: Props) {
   return (
     <div className="flex flex-col items-center w-full h-full overflow-hidden">
       <div className="relative w-full flex-1" style={{ minHeight: 250 }}>
-        {/* Pixi canvas mounts here */}
-        <div ref={wrapRef} className="w-full h-full" />
+        {/* Live2D canvas */}
+        <canvas
+          ref={canvasRef}
+          className="w-full h-full block"
+          style={{ opacity: live2dReady ? 1 : 0 }}
+        />
 
-        {/* SVG fallback when Live2D fails */}
+        {/* SVG fallback */}
         {(!live2dReady || loadError) && (
           <div className="absolute inset-0 flex items-center justify-center">
             <AnimatedAvatar
@@ -207,7 +208,7 @@ export default function KiraAvatar(props: Props) {
           </div>
         )}
 
-        {/* Loading spinner */}
+        {/* Loading */}
         {!live2dReady && !loadError && (
           <div className="absolute inset-0 flex flex-col items-center justify-center gap-2">
             <div className="w-8 h-8 border-3 border-kira-pink border-t-transparent rounded-full animate-spin" />
@@ -215,7 +216,7 @@ export default function KiraAvatar(props: Props) {
           </div>
         )}
 
-        {/* Expression buttons overlay top */}
+        {/* Expression buttons */}
         {live2dReady && (
           <>
             <div className="absolute top-1 left-0 right-0 flex gap-1 justify-center flex-wrap pointer-events-none">
@@ -238,7 +239,7 @@ export default function KiraAvatar(props: Props) {
               </div>
             </div>
 
-            {/* Talk button overlay bottom-center */}
+            {/* Talk button */}
             <div className="absolute bottom-2 left-0 right-0 flex justify-center pointer-events-none">
               <button
                 onClick={props.onTalkToggle}
@@ -253,7 +254,7 @@ export default function KiraAvatar(props: Props) {
               </button>
             </div>
 
-            {/* Status overlay bottom-right */}
+            {/* Status */}
             <div className="absolute bottom-2 right-3 flex items-center gap-2 text-xs text-kira-plum/50 pointer-events-none">
               <span className={`w-2 h-2 rounded-full ${
                 props.isSpeaking ? 'bg-kira-pink animate-pulse'