back nav: lock view uses double-tap-to-exit instead of immediate exit (parity with entry view); back map verified across views

@@ -348,7 +348,8 @@348348       case "trash":349349         setView("list");350350         return;351-      case "entry": {351+      case "entry":352+      case "lock": {352353         const now = Date.now();353354         if (now - lastBackExitAt < 1600) {354355           void CapacitorApp.exitApp();