feat(expenses): add authoritative pre-review workflow

web/src/services/reimbursements.js

@@ -224,10 +224,26 @@ export function updateExpenseClaimItem(claimId, itemId, payload) {
   })
 }
 
-export function submitExpenseClaim(claimId) {
+function createPreReviewRequestId() {
+  if (typeof globalThis.crypto?.randomUUID === 'function') {
+    return `pre-review:${globalThis.crypto.randomUUID()}`
+  }
+  return `pre-review:${Date.now()}:${Math.random().toString(16).slice(2)}`
+}
+
+export function preReviewExpenseClaim(claimId, requestId = '') {
+  const normalizedRequestId = String(requestId || '').trim() || createPreReviewRequestId()
+  return apiRequest(`/reimbursements/claims/${encodeURIComponent(String(claimId || '').trim())}/pre-review`, {
+    method: 'POST',
+    headers: { 'X-Request-ID': normalizedRequestId },
+    body: JSON.stringify({})
+  })
+}
+
+export function submitExpenseClaim(claimId, payload = {}) {
   return apiRequest(`/reimbursements/claims/${encodeURIComponent(String(claimId || '').trim())}/submit`, {
     method: 'POST',
-    body: JSON.stringify({})
+    body: JSON.stringify(payload || {})
   })
 }