feat(freight-api): seal EDR side of contracts with the one global stamp

apps/edr-freight-web/backoffice/src/services/bookings.service.ts

@@ -111,11 +111,14 @@ export interface ConsolidationDetails {
   splitBilling: { bookingShare: number; partnerShare: number } | null;
 }
 
+/**
+ * No stamp field: the backoffice only ever signs as STAFF, and EDR's seal is
+ * the ONE global company stamp applied server-side. Customer stamps are posted
+ * from the portal, not here.
+ */
 export interface SignContractPayload {
   role: "CUSTOMER" | "STAFF";
   signatureImageBase64: string;
-  /** Company stamp/seal image; the API requires one for CUSTOMER and STAFF. */
-  stampImageBase64?: string;
   signerDisplayName: string;
   consentText?: string;
 }

apps/edr-freight-web/backoffice/src/services/contracts.service.ts

@@ -118,11 +118,14 @@ export interface ContractView {
   } | null;
 }
 
+/**
+ * No stamp field: the backoffice only ever counter-signs as STAFF, and EDR's
+ * seal is the ONE global company stamp, snapshotted server-side from
+ * StampSettingsService when the signature is stored.
+ */
 export interface SignContractPayload {
   role: "CUSTOMER" | "STAFF";
   signatureImageBase64: string;
-  /** Company stamp/seal image; required to sign a contract. */
-  stampImageBase64?: string;
   signerDisplayName: string;
   consentText?: string;
 }

apps/edr-freight-web/backoffice/src/services/signatures.service.ts

@@ -9,12 +9,16 @@ export interface SavedSignature {
   stampImageUrl?: string | null;
 }
 
+/**
+ * Signature only. A backoffice employee has no personal stamp — EDR seals with
+ * the one global company stamp managed under Settings — so the stamp half of
+ * PUT /me/signature is deliberately not exposed here, even though the shared
+ * endpoint still accepts it for portal (customer) users.
+ */
 export interface SaveSignaturePayload {
   signerDisplayName: string;
-  /** Omit to keep the existing saved signature (stamp-only update). */
+  /** Omit to keep the existing saved signature. */
   signatureImageBase64?: string;
-  /** Omit to keep the existing saved stamp. */
-  stampImageBase64?: string;
 }
 
 export const signaturesService = {