fix(tui): increase maint tab min column widths for TYPE/MONITORS/STATUS

TYPE min 10→13 (fits 'maintenance'), MONITORS min 10→13, STATUS min 8→11
(fits 'SCHEDULED'). Prevents word wrapping.

internal/tui/tab_maint.go

@@ -96,9 +96,9 @@ func (m Model) viewMaintTab() string {
 	cols := []colDef{
 		{"#", "#", 4, 4, false},
 		{"TITLE", "TITLE", 12, 28, true},
-		{"TYPE", "TYPE", 10, 14, false},
-		{"MON", "MONITORS", 10, 20, false},
-		{"STATUS", "STATUS", 8, 12, false},
+		{"TYPE", "TYPE", 13, 14, false},
+		{"MON", "MONITORS", 13, 20, false},
+		{"STATUS", "STATUS", 11, 12, false},
 		{"START", "STARTED", 10, 16, false},
 		{"ENDS", "ENDS", 10, 16, false},
 	}