Plan Your Day 0.5

Plan Your Day 0.5 release.\n\nHighlights:\n- Adds frontend color modes with visitor switching and Noto Sans assets.\n- Cleans up admin interface copy fields and hard-codes removed labels/messages to defaults.\n- Adds draggable active-category ordering in the admin categories table.\n- Includes schema 3 upgrade cleanup that re-saves sanitized settings for existing installs, pruning removed interface-copy keys while preserving current saved settings.\n\nUpdate notes:\n- Installable artifact: plan-your-day-0.5.zip\n- The zip contains the unversioned plan-your-day/ plugin directory for replacing existing manual installs.\n- Release zips include production Composer autoload files.