feat(managed-ne): add bastion SSH protocol proxy hop type

Support composite-username bastion login for automated connect-test and exec, with bastion-managed or manual target credential modes.

Co-authored-by: Cursor <cursoragent@cursor.com>

web/src/services/api.ts

@@ -143,6 +143,7 @@ export const batchApplyHopManagedNe = (
     hop_command_template: string;
     hop_vrf: string;
     hop_vendor?: string;
+    hop_target_auth_mode?: string;
   },
 ) => apiPost<{ ok: boolean; updated: number }>("/v1/managed-ne/batch-hop", { ids, hop });