Fixes z-index issues with resizable panels handles

Author: samejr

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

@@ -30,7 +30,7 @@ const ResizableHandle = ({
   <PanelResizer
     className={cn(
       // Base styles
-      "group relative flex items-center justify-center focus-custom",
+      "group relative isolate flex items-center justify-center focus-custom",
       // Horizontal orientation (default)
       "w-0.75 after:absolute after:inset-y-0 after:left-1/2 after:w-1 after:-translate-x-1/2",
       // Vertical orientation
@@ -45,19 +45,19 @@ const ResizableHandle = ({
     {...props}
   >
     {/* Horizontal orientation line indicator */}
-    <div className="absolute left-[0.0625rem] top-0 z-20 h-full w-px bg-grid-bright transition group-hover:left-0 group-hover:w-0.75 group-hover:bg-indigo-500 group-data-[handle-orientation=vertical]:hidden" />
+    <div className="absolute left-[0.0625rem] top-0 h-full w-px bg-grid-bright transition group-hover:left-0 group-hover:w-0.75 group-hover:bg-indigo-500 group-data-[handle-orientation=vertical]:hidden" />
     {/* Vertical orientation line indicator */}
-    <div className="absolute left-0 top-[0.0625rem] z-20 hidden h-px w-full bg-grid-bright transition group-hover:top-0 group-hover:h-0.75 group-hover:bg-indigo-500 group-data-[handle-orientation=vertical]:block" />
+    <div className="absolute left-0 top-[0.0625rem] hidden h-px w-full bg-grid-bright transition group-hover:top-0 group-hover:h-0.75 group-hover:bg-indigo-500 group-data-[handle-orientation=vertical]:block" />
     {withHandle && (
       <>
         {/* Horizontal orientation dots (vertical arrangement) */}
-        <div className="z-10 flex h-5 w-0.75 flex-col items-center justify-center gap-[0.1875rem] bg-background-dimmed group-hover:hidden group-data-[handle-orientation=vertical]:hidden">
+        <div className="relative flex h-5 w-0.75 flex-col items-center justify-center gap-[0.1875rem] bg-background-dimmed transition-opacity group-hover:opacity-0 group-data-[handle-orientation=vertical]:hidden">
           {Array.from({ length: 3 }).map((_, index) => (
             <div key={index} className="h-[0.1875rem] w-0.75 rounded-full bg-charcoal-600" />
           ))}
         </div>
         {/* Vertical orientation dots (horizontal arrangement) */}
-        <div className="z-10 hidden h-0.75 w-5 flex-row items-center justify-center gap-[0.1875rem] bg-background-dimmed group-hover:hidden group-data-[handle-orientation=vertical]:flex">
+        <div className="relative hidden h-0.75 w-5 flex-row items-center justify-center gap-[0.1875rem] bg-background-dimmed transition-opacity group-hover:opacity-0 group-data-[handle-orientation=vertical]:flex">
           {Array.from({ length: 3 }).map((_, index) => (
             <div key={index} className="h-0.75 w-[0.1875rem] rounded-full bg-charcoal-600" />
           ))}