feat(web): set breadcrumb trails on all AppShell routes (#54)

web/src/fields/fields-page.tsx

@@ -5,6 +5,7 @@ import type { components } from "../api/schema";
 import { FieldList } from "./field-list";
 import { FieldForm } from "./field-form";
 import { useDocumentTitle } from "../lib/use-document-title";
+import { useBreadcrumb } from "../shell/use-breadcrumb";
 import { PageTitle } from "@/components/ui/page-title";
 
 type FieldDefinitionView = components["schemas"]["FieldDefinitionView"];
@@ -14,6 +15,7 @@ export function FieldsPage() {
   const [selected, setSelected] = useState<FieldDefinitionView | null>(null);
 
   useDocumentTitle(t("fields.title"));
+  useBreadcrumb([{ label: t("nav.fields") }]);
 
   return (
     <div className="flex h-full flex-col">