chore: bump version to v2026.4.298 and improve frontend build/UX}
- Bump version from v2026.4.290 to v2026.4.298 across all docs and package.json - Add dev-only sass build mode (cosmo + slate only) for faster iteration (~2s vs ~35s) - Add watch:dev npm script and separate sass-dev grunt watch task - Update docker-compose to use watch:dev for faster container rebuilds - Remove full grunt build from docker-init-execute.sh init script - Rename _bs3-compat.scss to _variables.scss with updated description - Migrate all jQuery .click()/.click(fn) calls to .on('click', fn)/.trigger('click') - Replace $(document).height() with document.documentElement.scrollHeight for reliable scroll detection - Add vapor and quartz to dark theme list in Application.php - Apply oneDark extension alongside dark theme in CodeMirror editor - Add margin-bottom to pager bottom element and line break before footer - Update CSS cache-busting hash across all theme references