Address code review feedback: remove packageManager field, fix git version handling, improve error handling, and delete package-lock.json

Co-authored-by: sxzz <[email protected]>

Author: Copilot

app/utils/download.ts

@@ -14,19 +14,24 @@ export function downloadProject() {
     name: 'rolldown-repl-project',
     version: '1.0.0',
     private: true,
-    packageManager: '[email protected]',
     type: 'module',
     scripts: {
       build: 'rolldown',
       dev: 'rolldown --watch',
     },
     dependencies: {
       rolldown:
-        currentVersion.value === 'latest' ? '^1.0.0' : currentVersion.value,
+        currentVersion.value === 'latest'
+          ? '^1.0.0'
+          : currentVersion.value.startsWith('@git')
+            ? `https://pkg.pr.new/rolldown@${currentVersion.value.slice(4)}`
+            : currentVersion.value,
     },
   }
 
-  projectFiles['package.json'] = strToU8(JSON.stringify(packageJson, null, 2))
+  projectFiles['package.json'] = strToU8(
+    `${JSON.stringify(packageJson, null, 2)}\n`,
+  )
 
   // Create zip file
   return new Promise<Uint8Array>((resolve, reject) => {
@@ -51,21 +56,11 @@ export function triggerDownload(data: Uint8Array, filename: string) {
   URL.revokeObjectURL(url)
 }
 
-export function handleDownloadProject() {
+export async function handleDownloadProject() {
   try {
-    downloadProject()
-      .then((zipData) => {
-        const timestamp = new Date()
-          .toISOString()
-          .slice(0, 19)
-          .replaceAll(':', '-')
-        triggerDownload(zipData, `rolldown-repl-${timestamp}.zip`)
-      })
-      .catch((error) => {
-        console.error('Failed to download project:', error)
-        // eslint-disable-next-line no-alert
-        alert('Failed to download project. Please try again.')
-      })
+    const zipData = await downloadProject()
+    const timestamp = new Date().toISOString().slice(0, 19).replaceAll(':', '-')
+    triggerDownload(zipData, `rolldown-repl-${timestamp}.zip`)
   } catch (error) {
     console.error('Failed to download project:', error)
     // eslint-disable-next-line no-alert