Adopt shared WebUI structural primitives

webui/src/features/admin/AdminPage.tsx

@@ -12,6 +12,7 @@ import type {
 } from "@govoplan/core-webui";
 import { fetchShellAuth } from "@govoplan/core-webui";
 import { ActionBlockerHint } from "@govoplan/core-webui";
+import { PageLayout, WorkspaceLayout } from "@govoplan/core-webui";
 import { PageScrollViewport } from "@govoplan/core-webui";
 import {
   TreeSubnav,
@@ -322,15 +323,26 @@ export default function AdminPage({
   const contributionContext = { settings, auth, onAuthChange, refreshAuth, availableSections: available, selectSection };
 
   return (
-    <div className="workspace module-workspace">
-      <TreeSubnav
-        active={active}
-        nodes={adminTree}
-        onSelect={selectSection}
-        ariaLabel="i18n:govoplan-access.admin.4e7afebc"
-      />
-      <section className="workspace-content">
-        <div className="content-pad workspace-data-page">
+    <WorkspaceLayout
+      className="module-workspace"
+      primary={(
+        <TreeSubnav
+          active={active}
+          nodes={adminTree}
+          onSelect={selectSection}
+          ariaLabel="i18n:govoplan-access.admin.4e7afebc"
+        />
+      )}
+      primaryLabel="i18n:govoplan-access.admin.4e7afebc"
+      contentLabel="i18n:govoplan-access.admin.4e7afebc"
+      documentationType="admin"
+    >
+      <PageLayout
+        title="i18n:govoplan-access.admin.4e7afebc"
+        mode="workspace"
+        showHeader={false}
+        documentationType="admin"
+      >
           {contributedSection && contributedSection.render(contributionContext)}
           {!contributedSection && active === "system-mail-servers" && (
             <MailProfilesPanel settings={settings} scopeType="system" canWriteProfiles={hasScope(auth, "system:settings:write")} canManageCredentials={hasScope(auth, "system:settings:write")} canWritePolicy={hasScope(auth, "system:settings:write")} />
@@ -368,9 +380,8 @@ export default function AdminPage({
           {!contributedSection && active === "tenant-group-credentials" && <CredentialEnvelopesPanel settings={settings} scopeType="group" canWrite={hasAnyScope(auth, ["admin:settings:write", "access:credential:write"])} />}
           {!contributedSection && active === "tenant-user-file-connectors" && <FileConnectorsPanel settings={settings} scopeType="user" canWrite={hasAnyScope(auth, ["files:file:admin", "admin:settings:write"])} />}
           {!contributedSection && active === "tenant-group-file-connectors" && <FileConnectorsPanel settings={settings} scopeType="group" canWrite={hasAnyScope(auth, ["files:file:admin", "admin:settings:write"])} />}
-        </div>
-      </section>
-    </div>
+      </PageLayout>
+    </WorkspaceLayout>
   );
 }