TutorDesk v0.1.1 - Responsive polish

TutorDesk v0.1.1 is a focused visual polish release.\n\nChanges:\n- Replaced the mobile horizontal navigation strip with an accessible compact view selector\n- Improved header spacing across mobile and desktop breakpoints\n- Replaced the visible shortcut label with platform-neutral Ctrl K copy\n- Bumped package metadata to 0.1.1\n\nVerification:\n- npm run lint\n- npm test\n- npm run build\n- Browser layout audit at 390x844 and 1280x720 with no page-level horizontal overflow or console errors\n\nMerged PR: #13\nClosed issue: #12