Rechnungsdatum und Belegupload ueberarbeiten

src/lib/audit-snapshots.ts

@@ -56,6 +56,7 @@ export function snapshotExpense(
     | "approvalStatus"
     | "recurrence"
     | "recurrenceStartAt"
+    | "invoiceDate"
     | "proofUrl"
     | "createdAt"
     | "paidAt"
@@ -74,6 +75,7 @@ export function snapshotExpense(
     approvalStatus: expense.approvalStatus,
     recurrence: expense.recurrence,
     recurrenceStartAt: expense.recurrenceStartAt?.toISOString() ?? null,
+    invoiceDate: expense.invoiceDate?.toISOString() ?? null,
     proofUrl: expense.proofUrl,
     createdAt: expense.createdAt.toISOString(),
     paidAt: expense.paidAt?.toISOString() ?? null,

src/lib/dashboard-types.ts

@@ -49,6 +49,7 @@ export type DashboardExpense = {
   recurrenceStartAt: string | null;
   paidAt: string | null;
   documentedAt: string | null;
+  invoiceDate: string | null;
   proofUrl: string | null;
   createdAt: string;
   creator: {

src/lib/google-drive.ts

@@ -33,6 +33,7 @@ export function sanitizeDriveFileName(title: string, fallback = "beleg") {
 
 export async function uploadExpenseProofToDrive(input: {
   title: string;
+  invoiceDate: string;
   fileName: string;
   mimeType: string;
   buffer: Buffer;
@@ -41,8 +42,7 @@ export async function uploadExpenseProofToDrive(input: {
   const folderId = process.env.GOOGLE_DRIVE_FOLDER_ID || DEFAULT_DRIVE_FOLDER_ID;
   const extension = input.fileName.includes(".") ? `.${input.fileName.split(".").pop()}` : "";
   const baseName = sanitizeDriveFileName(input.title);
-  const uniqueSuffix = new Date().toISOString().replace(/[-:]/g, "").replace(/\.\d{3}Z$/, "Z");
-  const name = `${baseName}-${uniqueSuffix}${extension}`;
+  const name = `${input.invoiceDate}-${baseName}${extension}`;
 
   const response = await drive.files.create({
     requestBody: {