047bb237e0
Tab bar: Monitors | Maint | Settings (was 6 tabs). Settings tab merges Alerts, Nodes, Users as sub-sections with left/right arrow navigation. Each section keeps its own cursor, keybindings, and CRUD operations. Monitors tab now shows a log sidebar at >= 120 cols (70/30 split). Under 120 cols, monitors render full-width without logs. - Introduced tab constants (tabMonitors, tabMaint, tabSettings) - Introduced section constants (sectionAlerts, sectionNodes, sectionUsers) - Removed stateLogs and stateUsers states - All magic tab numbers replaced with named constants