ae56c97c60
Hovering a sidebar session row (one-line or card) now shows the complete title in a styled tooltip — but only when the title actually overflows its label, so fully visible titles never grow a redundant tip. New OverflowTip primitive in ui/tooltip.tsx: a controlled Tip that measures scrollWidth vs clientWidth on pointerenter and arms a 600ms deliberate-hover delay only when the content is truncated. Community request via @fhreire on X.