some error debugging and for frontend thicker lines around blocks

discord_verificiation/playtime-frontend/components/PopulationChart.tsx

@@ -370,7 +370,7 @@ export default function PopulationChart() {
   return (
     <div className="panel p-6">
       {/* Currently online — always visible, always live, not tied to the date range below */}
-      <div className="mb-6 pb-6 border-b border-base-border">
+      <div className="mb-6 pb-6 border-b-2 border-base-divider">
         <div className="flex items-center justify-between mb-3">
           <div className="flex items-center gap-2">
             <span className="relative flex w-2 h-2">
@@ -553,7 +553,7 @@ export default function PopulationChart() {
       </div>
 
       {selectedPoint && (
-        <div className="mt-4 pt-4 border-t border-base-border">
+        <div className="mt-4 pt-4 border-t-2 border-base-divider">
           <div className="stat-label mb-3">
             Online at {new Date(selectedPoint.t).toLocaleString()}
             {selectedPoint.mapName && (