feat(frontend): refactor Upload page to use useParse hook

src/pages/Upload.tsx

@@ -28,6 +28,7 @@ import {
 import { api, type ParseProgress } from "@/lib/api";
 import { fmt, toNum } from "@/lib/format";
 import { useAppStore } from "@/store";
+import { useParse } from "@/hooks/useParse";
 import type {
   ClaimOutput,
   ClaimPayment,
@@ -465,7 +466,6 @@ export function Upload() {
   const [file, setFile] = useState<File | null>(null);
   const [kind, setKind] = useState<ParsedBatchKind>("837p");
   const [payer, setPayer] = useState<string>(PAYERS_837[0]!.value);
-  const [running, setRunning] = useState(false);
   const [stream, setStream] = useState<StreamState>({
     items: [],
     expectedTotal: null,
@@ -474,11 +474,16 @@ export function Upload() {
   });
   const addParsedBatch = useAppStore((s) => s.addParsedBatch);
   const parsedBatches = useAppStore((s) => s.parsedBatches);
+  // useParse wires the mutation; on success it invalidates every list query
+  // (batches, claims, remittances, providers, activity) so the other pages
+  // see the new data without manual refetching.
+  const parseMutation = useParse(kind);
 
   const payerOptions = kind === "837p" ? PAYERS_837 : PAYERS_835;
 
   const expectedTotal = stream.expectedTotal;
   const totalSoFar = stream.items.length;
+  const running = parseMutation.isPending;
   const progressPct = useMemo(() => {
     if (!expectedTotal || expectedTotal <= 0) return 0;
     return Math.min(100, Math.round((totalSoFar / expectedTotal) * 100));
@@ -497,11 +502,8 @@ export function Upload() {
       );
       return;
     }
-    setRunning(true);
     setStream({ items: [], expectedTotal: null, passed: 0, failed: 0 });
-    const startedAt = new Date().toISOString();
     const items: StreamedClaim[] = [];
-    try {
     const onProgress: ParseProgress = (event) => {
       if (event.type === "claim") {
         items.push({ kind: "837p", data: event.data });
@@ -527,9 +529,14 @@ export function Upload() {
       // the page summary at the end reports the real pass/fail counts.
     };
 
-      const summary = await (kind === "837p"
+    try {
-        ? api.parse837(file, { payer, onProgress })
+      // mutateAsync triggers the mutation; the streaming callbacks above
-        : api.parse835(file, { payer, onProgress }));
+      // populate `stream` as claims arrive, and the resolver returns the
+      // final BatchSummary from the "summary" NDJSON line.
+      const summary = await parseMutation.mutateAsync({
+        file,
+        options: { payer, onProgress },
+      });
 
       // The final return value is a BatchSummary in the streaming case.
       const finalSummary =
@@ -548,7 +555,7 @@ export function Upload() {
           id,
           kind,
           inputFilename: file.name,
-          parsedAt: startedAt,
+          parsedAt: new Date().toISOString(),
           claimCount: finalSummary.total_claims,
           passed: finalSummary.passed,
           failed: finalSummary.failed,
@@ -567,8 +574,6 @@ export function Upload() {
       toast.error(
         err instanceof Error ? err.message : "Failed to parse file"
       );
-    } finally {
-      setRunning(false);
     }
   }