feat(frontend): Batches browser page with list + detail drawer

src/App.tsx

@@ -9,6 +9,7 @@ import { ActivityLog } from "@/pages/ActivityLog";
 import { Upload } from "@/pages/Upload";
 import { ReconciliationPage } from "@/pages/Reconciliation";
 import { Acks } from "@/pages/Acks";
+import { Batches } from "@/pages/Batches";
 
 function NotFound() {
   return (
@@ -32,6 +33,7 @@ export default function App() {
           <Route path="upload" element={<Upload />} />
           <Route path="reconciliation" element={<ReconciliationPage />} />
           <Route path="acks" element={<Acks />} />
+          <Route path="batches" element={<Batches />} />
           <Route path="*" element={<NotFound />} />
         </Route>
       </Routes>