feat: add GLTF transformation and compression support

- Updated package.json to include @gltf-transform/core, @gltf-transform/extensions, @gltf-transform/functions, and draco3dgltf for GLB file processing.
- Implemented GLB compression using Draco in the upload model API route.
- Adjusted camera keyframes in ScrollScene for improved animation.
- Enhanced overlay styles in ScrollOverlays for better visual clarity.
- Added original GLB files for Kandoura, Suit, Unitree_G1, and Vest.
- Updated existing GLB files for Kandoura, Suit, Unitree_G1, and Vest.

src/app/api/admin/upload-model/route.ts

@@ -1,8 +1,22 @@
 import { NextResponse } from 'next/server';
 import { cookies } from 'next/headers';
 import { jwtVerify } from 'jose';
-import { writeFile, mkdir } from 'fs/promises';
+import { writeFile, mkdir, readFile } from 'fs/promises';
 import path from 'path';
+import { Document, NodeIO } from '@gltf-transform/core';
+import { ALL_EXTENSIONS } from '@gltf-transform/extensions';
+import { draco, dedup, prune, weld, simplify } from '@gltf-transform/functions';
+import draco3d from 'draco3dgltf';
+
+async function compressGLB(inputPath: string): Promise<void> {
+  const io = new NodeIO()
+    .registerExtensions(ALL_EXTENSIONS)
+    .registerDependencies({ 'draco3d.decoder': await draco3d.createDecoderModule(), 'draco3d.encoder': await draco3d.createEncoderModule() });
+
+  const document = await io.read(inputPath);
+  await document.transform(dedup(), prune(), weld(), draco());
+  await io.write(inputPath, document);
+}
 
 export async function POST(request: Request) {
   // Verify admin JWT
@@ -51,6 +65,13 @@ export async function POST(request: Request) {
   const buffer = Buffer.from(await file.arrayBuffer());
   await writeFile(destPath, buffer);
 
+  // Compress the uploaded GLB with Draco to reduce file size
+  try {
+    await compressGLB(destPath);
+  } catch (err) {
+    console.warn('GLB compression failed, serving uncompressed:', err);
+  }
+
   // Append a version timestamp so useGLTF cache is busted on replacement uploads
   const version = Date.now();
   return NextResponse.json({ modelPath: `/models/${safeId}.glb?v=${version}` });