refactor: stage uploads before drive and git delivery

app/api/upload/check/route.ts

@@ -1,9 +1,8 @@
 import { NextRequest, NextResponse } from 'next/server'
 import { validateUploadSecret } from '@/lib/auth'
-import { parseMultiUpload } from '@/lib/parse-upload'
 import { getRemoteFolder } from '@/lib/github'
 import { classifyFileChanges } from '@/lib/diff-files'
-import { prepareGitAssets } from '@/lib/prepare-git-assets'
+import { ensurePreparedStagingAssets } from '@/lib/upload-staging'
 
 export const runtime = 'nodejs'
 export const dynamic = 'force-dynamic'
@@ -16,22 +15,22 @@ export async function POST(req: NextRequest) {
   const authError = validateUploadSecret(req)
   if (authError) return authError
 
-  let folderName: string
-  let parsedFiles: Awaited<ReturnType<typeof parseMultiUpload>>['files']
+  let stagingId: string
 
   try {
-    const parsed = await parseMultiUpload(req)
-    folderName = parsed.folderName
-    parsedFiles = parsed.files
+    const body = await req.json()
+    stagingId = body.stagingId
+    if (!stagingId || typeof stagingId !== 'string') {
+      throw new Error('stagingId manquant')
+    }
   } catch (err) {
     const message = err instanceof Error ? err.message : 'Erreur inconnue'
     return NextResponse.json({ success: false, error: message }, { status: 400 })
   }
 
-  const folderPath = `public/models/${folderName}`
-
   try {
-    const { filesToPush } = await prepareGitAssets({ folderName, parsedFiles })
+    const { folderName, filesToPush } = await ensurePreparedStagingAssets(stagingId)
+    const folderPath = `public/models/${folderName}`
     const { exists, files } = await getRemoteFolder(folderPath)
 
     if (exists) {