first commit

api/src/utils/decimal.ts

@@ -0,0 +1,4 @@
+export const decimalTransformer = {
+  to: (value: number | null | undefined) => value == null ? null : value.toFixed(2),
+  from: (value: string | number | null | undefined) => value == null ? 0 : Number(value)
+};

api/src/utils/http.ts

@@ -0,0 +1,13 @@
+import type { Proof } from '../entities/Proof.js';
+export const buildProofUrl = (storedName: string | null) => storedName ? `/uploads/${storedName}` : null;
+export const serializeProof = (proof: Proof) => ({
+  id: proof.id,
+  type: proof.type,
+  label: proof.label,
+  note: proof.note,
+  originalName: proof.originalName,
+  mimeType: proof.mimeType,
+  fileSize: proof.fileSize,
+  fileUrl: buildProofUrl(proof.storedName),
+  createdAt: proof.createdAt
+});