fix(tooltip): park off-screen on create, enable glide after first placement

The tooltip was appended to body with no top/left, so its static-flow position
extended body.scrollWidth/scrollHeight during measurement. Fix by setting
initial top/left to -9999px so the node never lands in the flow.

Previously this slid the tooltip in from off-screen because the top/left 0.3s
transition was already live. Now the transition starts as opacity-only at
creation time; after the first updateTooltipPosition snaps into place, a
requestAnimationFrame re-enables the top/left easing so subsequent mousemove
updates keep the original smooth glide and 100ms debounce behavior.

LinkedTooltip's measurement div is parked the same way plus visibility:hidden,
since it exists only to read offsetWidth for the Svelte-rendered tooltip.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/lib/Tooltip/LinkedTooltip.svelte b/src/lib/Tooltip/LinkedTooltip.svelte
index b3fc6ae2..bbf0ffe5 100644
--- a/src/lib/Tooltip/LinkedTooltip.svelte
+++ b/src/lib/Tooltip/LinkedTooltip.svelte
@@ -36,6 +36,9 @@ const createTooltip = () => {
 	if (!tooltipDiv) {
 		tooltipDiv = document.createElement("div");
 		tooltipDiv.style.position = "absolute";
+		tooltipDiv.style.top = "-9999px";
+		tooltipDiv.style.left = "-9999px";
+		tooltipDiv.style.visibility = "hidden";
 		tooltipDiv.style.zIndex = "1000";
 		opacity = 0;
 		tooltipDiv.style.pointerEvents = "none";