fix: resolve async/await issues in download API routes

Fixed missing await keywords in asset store operations that were causing
type errors during build. Both download routes now properly await the
asynchronous asset store.get() calls.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

apps/web/src/app/api/download/[id]/route.ts

@@ -9,10 +9,10 @@ export async function GET(
     const { id } = params
 
     console.log('🔍 Looking for asset:', id)
-    console.log('📦 Available assets:', Array.from(assetStore.keys()))
+    console.log('📦 Available assets:', await assetStore.keys())
 
     // Get asset from store
-    const asset = assetStore.get(id)
+    const asset = await assetStore.get(id)
     if (!asset) {
       console.log('❌ Asset not found in store')
       return NextResponse.json({

apps/web/src/app/api/download/assets/[id]/route.ts

@@ -8,7 +8,7 @@ export async function GET(
   try {
     const { id } = params
 
-    const asset = assetStore.get(id)
+    const asset = await assetStore.get(id)
     if (!asset) {
       return NextResponse.json(
         { error: 'Asset not found' },