<h4>Template Upgrade Planning</h4><p>Created comprehensive documentation for upgrading from UBOLD4 (Bootstrap 3, jQuery 2.1.4, FA 4.6.3) to UBOLD v7.1.0 (Bootstrap 5.3.7, jQuery 3.7.1, Lucide Icons).</p><h5>Documents Created</h5><ul><li><strong>ROLLBACK_PLAN.md</strong> — 3-step rollback procedure (symlink revert, git checkout, full tar restore)</li><li><strong>UPGRADE_PLAN.md</strong> — 8-phase migration plan with scope analysis (8,520 BS class changes, 21,757 icon refs, 1,419 jQuery deprecated calls)</li><li><strong>TODO.md</strong> — Checkable progress tracker for all phases</li><li><strong>ABSTRACTION_LAYER_PLAN.md</strong> — Future-proofing strategy with 5 abstraction layers: semantic CSS classes (yp-core.css), PHP icon helper, UI component partials, template config constants, JS icon helper</li></ul><p>Full backup created: youportal_backup_20260328_050631.tar.gz (520MB)</p>