perf(falukant): simplify house runtime geometry

frontend/scripts/optimize-glb.mjs

@@ -62,6 +62,7 @@ function optimizeModelDirectory({ name, sourceDir, outputDir, required = false }
   }
 
   console.log(`Optimize Falukant ${name} GLBs (Draco + texture 1024)\n`);
+  const isHouse = name === 'house' || name === 'houses' || path.basename(sourceDir) === 'houses';
 
   for (const f of models) {
     const input = path.join(sourceDir, f);
@@ -71,7 +72,16 @@ function optimizeModelDirectory({ name, sourceDir, outputDir, required = false }
     try {
       const result = spawnSync(
         'node',
-        [cli, 'optimize', input, output, '--compress', 'draco', '--texture-size', '1024'],
+        [
+          cli, 'optimize', input, output,
+          '--compress', 'draco',
+          '--texture-size', '1024',
+          // Draco reduces download size, while simplify prevents high-poly
+          // scans from exhausting browser GPU memory. Houses are small
+          // previews, so they get a deliberately stronger reduction.
+          '--simplify-ratio', isHouse ? '0.05' : '0.35',
+          '--simplify-error', isHouse ? '0.02' : '0.01',
+        ],
         {
           stdio: 'inherit',
           cwd: path.join(__dirname, '..'),