fix(webapp): stop copy tooltip opening on whole-cell hover

The copy-cell tooltip was wired to a controlled `open` state that
followed the whole cell's hover, so it popped open over neighbouring
content whenever the pointer crossed any part of the cell instead of
just the copy button. Leave the tooltip uncontrolled so Radix opens
it only when the pointer or keyboard focus lands on the button
itself; the button still stays permanently mounted so it keeps its
place in the tab order.

Author: carderne

apps/webapp/app/components/code/TSQLResultsTable.tsx

@@ -845,9 +845,9 @@ function CopyableCell({
 
   // The button (with its aria-label) always sits in the same position in the tree, wrapped by
   // the same SimpleTooltip, so it is never unmounted/remounted on hover (which would drop
-  // keyboard focus). Only the tooltip's open state, not its mounted tree, follows hover; Radix
-  // still only renders the (comparatively expensive) tooltip content into the DOM of this
-  // virtualized grid while `open` is true.
+  // keyboard focus). The tooltip is left uncontrolled so Radix opens it only when the pointer or
+  // keyboard focus is actually on the button, not whenever the pointer is anywhere in this
+  // virtualized grid's cell.
   const copyButton = (
     <button
       type="button"
@@ -889,7 +889,6 @@ function CopyableCell({
       <SimpleTooltip
         asChild
         tabbable
-        open={isHovered}
         button={copyButton}
         content={copied ? "Copied!" : "Copy"}
         disableHoverableContent

apps/webapp/app/components/primitives/Table.tsx

@@ -480,8 +480,8 @@ export const CopyableTableCell = forwardRef<HTMLTableCellElement, CopyableTableC
 
     // The button (with its aria-label) always sits in the same position in the tree, wrapped by
     // the same SimpleTooltip, so it is never unmounted/remounted on hover (which would drop
-    // keyboard focus). Only the tooltip's open state, not its mounted tree, follows hover; Radix
-    // still only renders the tooltip content into the DOM while `open` is true.
+    // keyboard focus). The tooltip is left uncontrolled so Radix opens it only when the pointer
+    // or keyboard focus is actually on the button, not whenever the pointer is anywhere in the cell.
     const copyButton = (
       <button
         type="button"
@@ -518,7 +518,6 @@ export const CopyableTableCell = forwardRef<HTMLTableCellElement, CopyableTableC
           <SimpleTooltip
             asChild
             tabbable
-            open={isHovered}
             button={copyButton}
             content={copied ? "Copied!" : "Copy"}
             disableHoverableContent