Enhance contract clearance features with review timestamps and staff identifiers; improve file handling in controllers and views for better user experience.

packages/types/src/freight/contracts.ts

@@ -222,6 +222,10 @@ export interface ContractClearanceDocument {
   file: { id: string; name: string; url: string } | null;
   reviewStatus: ContractDocReviewStatus | null;
   note: string | null;
+  /** When the review decision (approve/query) was recorded. */
+  reviewedAt?: string | null;
+  /** Staff id that recorded the decision (no user directory to resolve names). */
+  reviewedByStaffId?: string | null;
 }
 
 export interface ContractClearanceView {