feat(web): add tone mapping and brightness to 3D scene

The EffectComposer disables three's tone mapping, leaving colors flat and washed out. Add ACES filmic tone mapping plus a small brightness lift so cards match their source images.

apps/web/src/components/viewers/Scene.tsx

@@ -2,7 +2,8 @@ import { Suspense, useEffect, useRef, useState, type ReactNode } from 'react';
 import { Icon } from '@iconify/react';
 import { Canvas } from '@react-three/fiber';
 import { Bounds, ContactShadows, OrbitControls, useProgress } from '@react-three/drei';
-import { EffectComposer, Vignette } from '@react-three/postprocessing';
+import { BrightnessContrast, EffectComposer, ToneMapping, Vignette } from '@react-three/postprocessing';
+import { ToneMappingMode } from 'postprocessing';
 
 /**
  * Shared 3D scene wrapper for object viewers. Provides a consistent camera,
@@ -120,6 +121,8 @@ export default function Scene({
         />
 
         <EffectComposer>
+          <ToneMapping mode={ToneMappingMode.ACES_FILMIC} />
+          <BrightnessContrast brightness={0.06} contrast={0} />
           <Vignette eskil={false} offset={0.25} darkness={0.6} />
         </EffectComposer>
       </Canvas>