Removed awaits, clean up API route

frontend/server/api/champion/[alias].ts

@@ -5,15 +5,62 @@ async function championInfos(client: MongoClient, patch: string, championAlias:
   const database = client.db('champions')
   const collection = database.collection(patch)
   const query = { alias: championAlias }
-  const championInfo = (await collection.findOne(query)) as unknown as ChampionData
+  const championInfo = (await collection.findOne(query)) as unknown as ChampionData | null
   return championInfo
 }
 
 export default defineEventHandler(async event => {
-  const championAlias = (getRouterParam(event, 'alias') as string).toLowerCase()
-  const client = await connectToDatabase()
-  const latestPatch = await fetchLatestPatch(client)
-  const data = await championInfos(client, latestPatch, championAlias)
-  await client.close()
-  return data
+  try {
+    const championAlias = (getRouterParam(event, 'alias') as string).toLowerCase()
+
+    // Validate champion alias
+    if (!championAlias || typeof championAlias !== 'string') {
+      throw createError({
+        statusCode: 400,
+        statusMessage: 'Invalid champion alias',
+        data: { alias: championAlias }
+      })
+    }
+
+    const client = await connectToDatabase()
+    const latestPatch = await fetchLatestPatch(client)
+    const data = await championInfos(client, latestPatch, championAlias)
+    await client.close()
+
+    if (!data) {
+      throw createError({
+        statusCode: 404,
+        statusMessage: 'Champion not found',
+        data: { alias: championAlias, patch: latestPatch }
+      })
+    }
+
+    return data
+  } catch (error) {
+    console.error('Error in champion API:', error)
+
+    // Handle different error types
+    if (error instanceof Error) {
+      throw createError({
+        statusCode: 500,
+        statusMessage: 'Failed to fetch champion data',
+        data: {
+          error: error.message,
+          championAlias: getRouterParam(event, 'alias')
+        }
+      })
+    }
+
+    // Re-throw if it's already a proper error
+    if (error && typeof error === 'object' && 'statusCode' in error) {
+      throw error
+    }
+
+    // Fallback error
+    throw createError({
+      statusCode: 500,
+      statusMessage: 'Internal server error',
+      data: { championAlias: getRouterParam(event, 'alias') }
+    })
+  }
 })