Companion: double the mascot size + drop the sleepy-face nap

- Mascot badge 64→128px (Lottie 56→112, emoji fallback 32→64); zzz glyph
  scaled + repositioned to match. It read too small on screen.
- Awake companions (no sleeping clip, e.g. Happy Dog) no longer show a 😴
  face or drifting "z" when the engine naps them — they hold their idle pose
  via a renderMood redirect. Only the always-asleep cat (real sleep clip)
  keeps the zzz, preserving that gag.

Claude-Session: https://claude.ai/code/session_016Yr6jELuRc7hyzYLccQKZd

web/src/components/Companion/companions.ts

@@ -41,7 +41,7 @@ export const COMPANIONS: Companion[] = [
       happy: happyDog,
       talking: happyDog,
       celebrate: happyDog,
-      // no sleeping clip → naps with the 😴 emoji fallback
+      // no sleeping clip → stays in its idle pose instead of visibly napping
     },
   },
 ]