ui: unified frosted glass frame around Live2D stage

Single bg-white/40 backdrop-blur-xl container as CSS grid.
Sidebars, top bar, bottom bar are grid cells sharing one rounded frame.
Center cell transparent for Live2D. Thin border-white/20 dividers.

frontend/src/App.tsx

@@ -115,30 +115,30 @@ export default function App() {
       />
 
       <Particles type={currentScene.particles ?? 'none'} />
-      <div className="relative z-20 h-full flex flex-col">
+      <div className="relative z-20 h-full p-4">
-        {/* ── Top bar: scene selector + clock ── */}
+        <div className="h-full bg-white/40 backdrop-blur-xl rounded-2xl grid grid-rows-[auto_1fr_auto] grid-cols-[288px_1fr_256px] overflow-hidden">
-        <div className="flex items-center justify-between px-5 py-3 shrink-0 bg-white/40 backdrop-blur-xl rounded-2xl mx-4">
-          <div className="flex items-center gap-1">
-            {SCENES.map((s) => (
-              <button key={s.id} onClick={() => handleSceneChange(s.id)}
-                className={'w-8 h-8 rounded-full flex items-center justify-center text-sm transition-all '
-                  + (s.id === currentSceneId ? 'bg-white/60 shadow-sm scale-110' : 'hover:bg-white/30')}>
-                {s.icon}
-              </button>
-            ))}
-          </div>
-          <div className="flex items-center gap-4">
-            <span className="text-kira-plum/30 text-xs font-medium">
-              {new Date().toLocaleTimeString([], { hour: '2-digit', minute: '2-digit' })} &middot; {new Date().toLocaleDateString([], { weekday: 'short', month: 'short', day: 'numeric' })}
-            </span>
-            <span className="text-xs text-kira-plum/20">🌸 body double</span>
-          </div>
-        </div>
 
-        {/* ── Main three-column body ── */}
+          {/* ── Top bar: scene selector + clock ── */}
-        <div className="flex-1 flex min-h-0 px-4 gap-4">
+          <div className="col-span-3 flex items-center justify-between px-5 py-3 shrink-0">
-          {/* LEFT: Focus Timer + Chat + Input */}
+            <div className="flex items-center gap-1">
-          <div className="w-72 shrink-0 flex flex-col gap-3 bg-white/40 backdrop-blur-xl rounded-2xl p-3">
+              {SCENES.map((s) => (
+                <button key={s.id} onClick={() => handleSceneChange(s.id)}
+                  className={'w-8 h-8 rounded-full flex items-center justify-center text-sm transition-all '
+                    + (s.id === currentSceneId ? 'bg-white/60 shadow-sm scale-110' : 'hover:bg-white/30')}>
+                  {s.icon}
+                </button>
+              ))}
+            </div>
+            <div className="flex items-center gap-4">
+              <span className="text-kira-plum/30 text-xs font-medium">
+                {new Date().toLocaleTimeString([], { hour: '2-digit', minute: '2-digit' })} &middot; {new Date().toLocaleDateString([], { weekday: 'short', month: 'short', day: 'numeric' })}
+              </span>
+              <span className="text-xs text-kira-plum/20">🌸 body double</span>
+            </div>
+          </div>
+
+          {/* ── Left sidebar ── */}
+          <div className="flex flex-col gap-3 p-3 overflow-y-auto border-r border-white/20">
             <div className="shrink-0">
               <Timer />
             </div>
@@ -148,8 +148,8 @@ export default function App() {
             </div>
           </div>
 
-          {/* CENTER: Avatar UI overlay (Live2D renders on the background stage) */}
+          {/* ── Center: transparent for Live2D ── */}
-          <div className="flex-1 min-w-0 rounded-2xl bg-transparent overflow-hidden">
+          <div className="min-w-0 overflow-hidden">
             <KiraAvatar
               isSpeaking={isKiraSpeaking}
               isListening={isRecording}
@@ -161,32 +161,31 @@ export default function App() {
             />
           </div>
 
-          {/* RIGHT: Ambient + Companions */}
+          {/* ── Right sidebar ── */}
-          <div className="w-64 shrink-0 flex flex-col bg-white/40 backdrop-blur-xl rounded-2xl p-3">
+          <div className="flex flex-col p-3 overflow-y-auto border-l border-white/20">
             <div className="flex-1 flex flex-col gap-3 overflow-y-auto">
               <MusicPlayer />
               <WhiteNoise />
               <Wardrobe onOutfitChange={handleOutfitChange} onAccessoryChange={handleAccessoryChange} />
             </div>
-            <div className="shrink-0 pt-2">
+          </div>
+
+          {/* ── Bottom status bar ── */}
+          <div className="col-span-3 shrink-0 px-5 py-2 flex items-center justify-between text-[11px] text-kira-plum/30 border-t border-white/20">
+            <div className="flex items-center gap-2">
+              <span className={`w-1.5 h-1.5 rounded-full ${
+                isRecording ? 'bg-red-400 animate-pulse'
+                : isKiraSpeaking ? 'bg-kira-pink animate-pulse'
+                : 'bg-kira-mint'
+              }`} />
+              {isRecording ? 'listening...' : isKiraSpeaking ? 'kira speaking...' : `kira's here for you, ${userName}`}
+            </div>
+            <div className="flex items-center gap-2">
+              <span className={isConnected ? '' : 'text-red-300'}>{isConnected ? '' : 'reconnecting...'}</span>
+              <span>💖</span>
             </div>
           </div>
-        </div>
 
-        {/* ── Bottom status bar ── */}
-        <div className="shrink-0 px-5 py-2 flex items-center justify-between text-[11px] text-kira-plum/30 bg-white/40 backdrop-blur-xl rounded-2xl mx-4">
-          <div className="flex items-center gap-2">
-            <span className={`w-1.5 h-1.5 rounded-full ${
-              isRecording ? 'bg-red-400 animate-pulse'
-              : isKiraSpeaking ? 'bg-kira-pink animate-pulse'
-              : 'bg-kira-mint'
-            }`} />
-            {isRecording ? 'listening...' : isKiraSpeaking ? 'kira speaking...' : `kira's here for you, ${userName}`}
-          </div>
-          <div className="flex items-center gap-2">
-            <span className={isConnected ? '' : 'text-red-300'}>{isConnected ? '' : 'reconnecting...'}</span>
-            <span>💖</span>
-          </div>
         </div>
       </div>
     </div>