fix(tooltip): use fixed positioning and snappy cursor tracking

Body grew on hover because the absolutely-positioned tooltip was appended to
document.body without top/left, so its static-flow position extended
body.scrollWidth/scrollHeight during layout measurement.

Switch both the use:tooltip directive and LinkedTooltip's measurement div to
position:fixed, which is relative to the viewport and does not contribute to
the body's scroll area. The directive now also uses clientX/clientY (dropping
the scrollY offset for the pin branch), removes the 100ms mousemove debounce,
and drops the top/left transition so the tooltip tracks the cursor without
feeling laggy or sliding in from the page top.

0 files changed, 0 insertions, 0 deletions