feat: import FreePro accepte .xls, .xlsx et .csv

server/freeproService.ts

@@ -77,9 +77,16 @@ function getType(labelClient: string, script: string): string {
  */
 export function processFreeproExcel(
   buffer: Buffer,
-  moisLabel: string
+  moisLabel: string,
+  fileName?: string
 ): FreeproVentilationResult {
-  const wb = xlsx.read(buffer, { type: "buffer", cellDates: true });
+  // Détecter si c'est un CSV (par extension ou par détection du contenu)
+  const isCsv = fileName
+    ? /\.csv$/i.test(fileName)
+    : !buffer[0] || (buffer[0] !== 0x50 && buffer[0] !== 0xD0); // PK = xlsx, D0CF = xls
+  const wb = isCsv
+    ? xlsx.read(buffer.toString("utf8"), { type: "string", cellDates: true })
+    : xlsx.read(buffer, { type: "buffer", cellDates: true });
   const ws = wb.Sheets[wb.SheetNames[0]];
   const rawRows = xlsx.utils.sheet_to_json<Record<string, unknown>>(ws, {
     header: [