frontend: fix wallet push silently skipping in form dialogs

The "send to wallet" step in the appointment/invoice/prescription/
patient-edit/scribe dialogs was gated on sync.linked, which resolves
asynchronously via getWalletLink in an effect. A fast save (or a
transient failure that collapsed it to false) left a wallet-linked
patient looking unlinked, so the dialog took the else branch and pushed
nothing.

- Add ensureLinked() to useWalletSync: awaits getWalletLink at submit and
  returns the resolved status. Each of the 5 dialogs now awaits it before
  deciding whether to show the wallet step.
- Harden push() to drop empty/whitespace changes (the backend 400s on an
  empty change set) and add a translated summaryFallback so the step
  never sends an empty summary.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/components/appointments/add-appointment-dialog.tsx

@@ -195,7 +195,7 @@ export function AddAppointmentDialog({
       t("appointments.dialog.addedTitle"),
       `${selected.name} · ${time}`,
     );
-    if (sync.linked) {
+    if (await sync.ensureLinked()) {
       setWalletSummary(
         t("walletSync.summary.appointment", { date: keyOf(date), time }),
       );

frontend/components/chat/patient-form-dialog.tsx

@@ -396,7 +396,7 @@ export function PatientFormDialog({
           t("patientForm.updatedTitle"),
           t("patientForm.updatedBody", { name: saved.name }),
         );
-        if (sync.linked) {
+        if (await sync.ensureLinked()) {
           setStep("wallet");
           return;
         }

frontend/components/invoices/invoice-form-dialog.tsx

@@ -273,7 +273,7 @@ export function InvoiceFormDialog({
             })
           : await createInvoice(payload);
       onSaved(saved);
-      if (sync.linked) {
+      if (await sync.ensureLinked()) {
         setWalletSummary(
           mode === "edit"
             ? t("walletSync.summary.invoiceUpdated", { number: saved.number })

frontend/components/patients/scribe-dialog.tsx

@@ -233,7 +233,7 @@ export function ScribeDialog({
       const updated = await saveNote(patient.fileNumber, draft);
       notify.success(t("scribe.saved.title"), patient.name);
       onSaved(updated);
-      if (sync.linked) {
+      if (await sync.ensureLinked()) {
         setPhase("review");
         setWalletStep(true);
       } else {

frontend/components/prescriptions/add-prescription-dialog.tsx

@@ -347,7 +347,7 @@ export function AddPrescriptionDialog({
       t("prescriptions.dialog.addedTitle"),
       `${medication.trim()} · ${selected.name}`,
     );
-    if (sync.linked) {
+    if (await sync.ensureLinked()) {
       setWalletSummary(
         t("walletSync.summary.prescription", { drug: medication.trim() }),
       );

frontend/components/wallet/use-wallet-sync.ts

@@ -74,13 +74,43 @@ export function useWalletSync(fileNumber: string | null | undefined) {
     };
   }, [state, update]);
 
+  // Authoritatively resolve link status at submit time. The `linked` state above
+  // is populated asynchronously by the effect, so a fast save (or a transient
+  // failure that collapsed it to false) can leave a wallet-backed patient looking
+  // unlinked. Callers await this before deciding whether to show the wallet step,
+  // so the decision is never made on an unresolved check.
+  const ensureLinked = useCallback(async (): Promise<boolean> => {
+    if (!fileNumber) {
+      setLinked(false);
+      return false;
+    }
+    setChecking(true);
+    try {
+      await getWalletLink(fileNumber);
+      setLinked(true);
+      return true;
+    } catch {
+      setLinked(false);
+      return false;
+    } finally {
+      setChecking(false);
+    }
+  }, [fileNumber]);
+
   const push = useCallback(
     async (changes: string[]) => {
       if (!fileNumber) return;
+      // Never push an empty/whitespace change set — the backend rejects it (400).
+      const clean = changes.map((c) => c.trim()).filter(Boolean);
+      if (clean.length === 0) {
+        setError("generic");
+        setState("error");
+        return;
+      }
       setError(null);
       setState("pending");
       try {
-        const created = await pushWalletUpdate({ fileNumber, changes });
+        const created = await pushWalletUpdate({ fileNumber, changes: clean });
         setUpdate(created);
       } catch (err) {
         setError(err instanceof ApiError ? err.message : "generic");
@@ -96,7 +126,7 @@ export function useWalletSync(fileNumber: string | null | undefined) {
     setError(null);
   }, []);
 
-  return { linked, checking, state, update, error, push, reset };
+  return { linked, checking, state, update, error, ensureLinked, push, reset };
 }
 
 export type UseWalletSync = ReturnType<typeof useWalletSync>;

frontend/components/wallet/wallet-sync-step.tsx

@@ -60,6 +60,9 @@ export function WalletSyncStep({
   const { t } = useTranslation();
   const { state, update, error, push } = sync;
   const status = update?.status ?? "pending";
+  // The summary is the human-readable change the patient approves. Guard against
+  // an empty one (the backend 400s on empty changes) with a translated fallback.
+  const changeSummary = summary.trim() || t("walletSync.summaryFallback");
 
   return (
     <>
@@ -79,7 +82,7 @@ export function WalletSyncStep({
                 {t("walletSync.changesLabel")}
               </span>
               <div className="rounded-lg border bg-muted/50 px-3 py-2 text-foreground text-sm">
-                {summary}
+                {changeSummary}
               </div>
             </div>
             {error && (
@@ -119,7 +122,7 @@ export function WalletSyncStep({
             <Button onClick={onDone} type="button" variant="outline">
               {t("walletSync.skip")}
             </Button>
-            <Button onClick={() => push([summary])} type="button">
+            <Button onClick={() => push([changeSummary])} type="button">
               <Send className="size-4" />
               {t("walletSync.send")}
             </Button>

frontend/lib/i18n/locales/ar/translation.json

@@ -2257,6 +2257,7 @@
       "prescription": "وصفة جديدة: {{drug}}",
       "demographics": "تم تحديث البيانات الديموغرافية",
       "note": "ملاحظة سريرية جديدة"
-    }
+    },
+    "summaryFallback": "تم تحديث السجل"
   }
 }

frontend/lib/i18n/locales/de/translation.json

@@ -2237,6 +2237,7 @@
       "prescription": "Neues Rezept: {{drug}}",
       "demographics": "Stammdaten aktualisiert",
       "note": "Neue klinische Notiz"
-    }
+    },
+    "summaryFallback": "Datensatz aktualisiert"
   }
 }

frontend/lib/i18n/locales/en/translation.json

@@ -2237,6 +2237,7 @@
       "prescription": "New prescription: {{drug}}",
       "demographics": "Demographics updated",
       "note": "New clinical note"
-    }
+    },
+    "summaryFallback": "Record updated"
   }
 }

frontend/lib/i18n/locales/fr/translation.json

@@ -2237,6 +2237,7 @@
       "prescription": "Nouvelle ordonnance : {{drug}}",
       "demographics": "Données démographiques mises à jour",
       "note": "Nouvelle note clinique"
-    }
+    },
+    "summaryFallback": "Dossier mis à jour"
   }
 }

frontend/lib/i18n/locales/so/translation.json

@@ -2237,6 +2237,7 @@
       "prescription": "Rijeeto cusub: {{drug}}",
       "demographics": "Xogta bukaanka la cusboonaysiiyay",
       "note": "Qoraal caafimaad cusub"
-    }
+    },
+    "summaryFallback": "Diiwaanka waa la cusboonaysiiyay"
   }
 }