fix: prevent duplicate uploads and group asset commits

lib/asset-classification.ts

@@ -0,0 +1,23 @@
+export type AssetCategory = 'color' | 'roughness' | 'normal' | 'metalness' | 'assets'
+
+export function classifyAssetCategory(filename: string): AssetCategory {
+  const name = filename.toLowerCase().replace(/\.[^.]+$/, '')
+
+  if (name.includes('base_color') || name.includes('_color') || name === 'color') {
+    return 'color'
+  }
+
+  if (name.includes('roughness')) {
+    return 'roughness'
+  }
+
+  if (name.includes('normal')) {
+    return 'normal'
+  }
+
+  if (name.includes('metallic') || name.includes('metalness')) {
+    return 'metalness'
+  }
+
+  return 'assets'
+}