fix[frontend](logexplorer): fixed header horizontal scroll

Author: AlexSanchez-bit

frontend/src/features/log-explorer/components/LogExplorerView.tsx

@@ -507,8 +507,8 @@ export function LogExplorerView({ initial, onConfigChange }: LogExplorerViewProp
               />
             )}
             <div className="flex min-w-0 flex-1 flex-col border-l border-border">
-              <ResultsHeader columns={columns} autoColumns={autoColumns} onRemoveColumn={toggleColumn} />
-              <div ref={scrollRef} onScroll={onScroll} className="min-h-0 flex-1 overflow-y-auto">
+              <div ref={scrollRef} onScroll={onScroll} className="min-h-0 flex-1 overflow-auto">
+                <ResultsHeader columns={columns} autoColumns={autoColumns} onRemoveColumn={toggleColumn} />
                 {loading && rows.length === 0 ? (
                   <RowMessage>
                     <Loader2 className="h-4 w-4 animate-spin" /> {t('logExplorer.results.searching')}

frontend/src/features/log-explorer/components/log-results.tsx

@@ -135,7 +135,7 @@ export function ResultsHeader({
   const { t } = useTranslation()
   return (
     <div
-      className="grid items-center gap-3 border-b border-border/70 bg-muted/20 px-4 py-1.5 text-[10px] font-medium uppercase tracking-wider text-muted-foreground"
+      className="sticky top-0 z-10 grid items-center gap-3 border-b border-border/70 bg-card px-4 py-1.5 text-[10px] font-medium uppercase tracking-wider text-muted-foreground"
       style={{ gridTemplateColumns: gridTemplate(columns, autoColumns) }}
     >
       <div />
@@ -401,7 +401,7 @@ export function LogResults({
 }) {
   const [expanded, setExpanded] = useState<number | null>(null)
   return (
-    <div className="overflow-hidden rounded-lg border border-border bg-card">
+    <div className="overflow-auto rounded-lg border border-border bg-card">
       <ResultsHeader columns={columns} onRemoveColumn={onRemoveColumn} />
       {docs.length === 0 ? (
         <div className="px-6 py-12 text-center text-sm text-muted-foreground">{emptyText ?? '—'}</div>