fix(frontend): UnmatchedClaim/UnmatchedRemittance types match store.to_ui_claim_from_orm wire shape

The Reconciliation page crashed with 'c.chargeAmount.toFixed is undefined' because
the TS types declared fields the backend never emitted (chargeAmount vs billedAmount,
patientControlNumber vs patientName, statusCode vs status, totalPaid vs paidAmount).

- UnmatchedClaim: chargeAmount -> billedAmount, patientControlNumber -> patientName,
  payerId/serviceDate now optional (backend omits them)
- UnmatchedRemittance: statusCode -> status, totalPaid -> paidAmount,
  totalCharge/serviceDate/isReversal now optional
- Reconciliation page + test fixtures updated to use the wire shape
- Tests: 124/124 pass

src/pages/Reconciliation.test.tsx

@@ -95,10 +95,10 @@ describe("ReconciliationPage", () => {
       claims: [
         {
           id: "CLM-1",
-          patientControlNumber: "PCN-A",
-          serviceDate: "2026-06-01",
-          chargeAmount: 100,
+          patientName: "Patient A",
+          billedAmount: 100,
           providerNpi: "1234567890",
+          serviceDate: "2026-06-01",
           payerId: "P1",
           state: "submitted",
         },
@@ -107,12 +107,13 @@ describe("ReconciliationPage", () => {
         {
           id: "CLP-1:b1",
           payerClaimControlNumber: "PCN-A",
-          statusCode: "1",
-          totalCharge: 100,
-          totalPaid: 100,
+          status: "received",
+          paidAmount: 100,
           adjustmentAmount: 0,
-          serviceDate: "2026-06-01",
+          receivedDate: "2026-06-01",
           isReversal: false,
+          totalCharge: 100,
+          serviceDate: "2026-06-01",
           batchId: "b1",
         },
       ],

src/pages/Reconciliation.tsx

@@ -163,10 +163,10 @@ export function ReconciliationPage() {
                 >
                   <div className="display num text-sm">{c.id}</div>
                   <div className="font-mono text-xs text-muted-foreground">
-                    {c.patientControlNumber}
+                    {c.patientName}
                   </div>
                   <div className="text-xs text-muted-foreground mt-0.5">
-                    {c.serviceDate ?? "—"} · ${c.chargeAmount.toFixed(2)} · NPI{" "}
+                    {c.serviceDate ?? "—"} · ${c.billedAmount.toFixed(2)} · NPI{" "}
                     {c.providerNpi ?? "—"}
                   </div>
                 </button>
@@ -205,7 +205,7 @@ export function ReconciliationPage() {
                     ) : null}
                   </div>
                   <div className="text-xs text-muted-foreground mt-0.5">
-                    Status {r.statusCode} · ${r.totalPaid.toFixed(2)} paid · $
+                    Status {r.status} · ${r.paidAmount.toFixed(2)} paid · $
                     {r.adjustmentAmount.toFixed(2)} adj
                   </div>
                 </button>