fix(pets): dynamically position cat at PetZone DOM element

Cat position is now measured from the [data-petzone] DOM element's
getBoundingClientRect(), so it always aligns with the PetZone section
regardless of window size or sidebar content height.
Removed Live2DCat import from PetZone (cat renders on shared stage).

frontend/src/components/Live2DStage.tsx

@@ -12,49 +12,38 @@ interface Props {
  *   - Mochi the cat (PetZone, bottom of right sidebar)
  *
  * Canvas sits behind UI panels (z-0, pointer-events: none).
+ * Cat position is dynamically measured from the [data-petzone] DOM element.
  */
 
-// --- Layout constants (must match Tailwind in App.tsx) ---
-// Left sidebar: w-72 = 288px, gap-4 = 16px, px-4 = 16px
-// Right sidebar: w-64 = 256px, bottom bar: ~40px
 const PAD = 16;
 const LEFT_W = 288;
 const GAP = 16;
 const RIGHT_W = 256;
-const BOTTOM_BAR_H = 40;
 
-function positionModels(
-  kira: any, cat: any,
-  appW: number, appH: number,
-) {
-  // Center panel center
+function positionKira(kira: any, appW: number, appH: number) {
   const centerLeft = PAD + LEFT_W + GAP;
   const centerRight = appW - GAP - RIGHT_W - PAD;
   const centerMidX = (centerLeft + centerRight) / 2;
   const centerMidY = appH * 0.46;
 
-  if (kira) {
   const s = Math.min(((centerRight - centerLeft) * 0.78) / kira.width, (appH * 0.78) / kira.height);
   kira.scale.set(s);
   kira.anchor.set(0.5, 0.5);
   kira.position.set(centerMidX, centerMidY);
 }
 
-  // Right sidebar center
-  const rightLeft = appW - RIGHT_W - PAD;
-  const rightMidX = rightLeft + RIGHT_W / 2;
-  const catY = appH - BOTTOM_BAR_H - 50;
+function positionCat(cat: any) {
+  const el = document.querySelector('[data-petzone]');
+  if (!el || !cat) return;
+  const r = el.getBoundingClientRect();
 
-  if (cat) {
-    // Set scale to 1 first to get natural bounds, then compute target
   cat.scale.set(1);
   const naturalH = cat.getLocalBounds().height;
-    const targetPx = 100; // ~100px tall rendered
+  const targetPx = 100;
   const cs = naturalH > 0 ? targetPx / naturalH : 0.05;
   cat.scale.set(cs);
   cat.anchor.set(0.5, 0.5);
-    cat.position.set(rightMidX, catY);
-  }
+  cat.position.set(r.left + r.width / 2, r.top + r.height / 2 + 10);
 }
 
 export default function Live2DStage({ onKiraReady, onReady }: Props) {
@@ -92,7 +81,8 @@ export default function Live2DStage({ onKiraReady, onReady }: Props) {
 
         const onResize = () => {
           app.renderer.resize(window.innerWidth, window.innerHeight);
-          positionModels(kiraModel, catModel, app.screen.width, app.screen.height);
+          if (kiraModel) positionKira(kiraModel, app.screen.width, app.screen.height);
+          if (catModel) positionCat(catModel);
         };
         window.addEventListener('resize', onResize);
 
@@ -102,7 +92,7 @@ export default function Live2DStage({ onKiraReady, onReady }: Props) {
         });
         if (!mounted) { app.destroy(true); return; }
 
-        positionModels(kiraModel, null, app.screen.width, app.screen.height);
+        positionKira(kiraModel, app.screen.width, app.screen.height);
         (kiraModel as any).isInteractive = () => false;
         app.stage.addChild(kiraModel as any);
 
@@ -118,7 +108,9 @@ export default function Live2DStage({ onKiraReady, onReady }: Props) {
           });
           if (!mounted) return;
 
-          positionModels(kiraModel, catModel, app.screen.width, app.screen.height);
+          // Small delay to ensure PetZone DOM is rendered
+          await new Promise(r => setTimeout(r, 100));
+          positionCat(catModel);
           (catModel as any).isInteractive = () => false;
           app.stage.addChild(catModel as any);
 

frontend/src/components/PetZone.tsx

@@ -1,14 +1,11 @@
-import Live2DCat from './Live2DCat';
-
 export default function PetZone() {
   return (
-    <div className="p-4 relative overflow-hidden" style={{ minHeight: 160 }}>
+    <div data-petzone className="p-4 relative overflow-hidden" style={{ minHeight: 140 }}>
       <h3 className="text-sm font-bold text-kira-plum mb-2 flex items-center gap-2">
         <span>🐱</span> Pet Zone
       </h3>
-      <div className="flex flex-col items-center">
-        <Live2DCat className="w-28 h-28" />
-        <span className="text-[10px] text-kira-plum/60 mt-1 font-medium">Mochi</span>
+      <div className="flex flex-col items-center pt-2">
+        <span className="text-[10px] text-kira-plum/60 font-medium">Mochi</span>
       </div>
     </div>
   );