feat: add sorting to Pricing Units table

src/components/PricingView.tsx

@@ -83,6 +83,7 @@ export function PricingView({ data, headers, onSaveRow, onCaptureState, onEdit,
   const [editingType, setEditingType] = useState<{ rowIndex: number; value: string } | null>(null);
   const [typeSuggestions, setTypeSuggestions] = useState<string[]>([]);
   const typeInputRef = useRef<HTMLInputElement>(null);
+  const [sortConfig, setSortConfig] = useState<{ key: string | number; direction: 'asc' | 'desc' | null }>({ key: null, direction: null });
 
   const [isSearchOpen, setIsSearchOpen] = useState(false);
   const [selectedSearchItems, setSelectedSearchItems] = useState<Set<number>>(new Set());
@@ -332,6 +333,70 @@ export function PricingView({ data, headers, onSaveRow, onCaptureState, onEdit,
     return result;
   }, [analyzedRows, filterMode, search, nameColFilter, lineMultiFilter, classificationFilter, unitsOuterFilter, outerWFilter, outerLFilter, outerHFilter, dynamicColFilters]);
 
+  // ── Sorted rows ──────────────────────────────────────────────────────────
+  const sortedRows = useMemo(() => {
+    if (sortConfig.key === null || sortConfig.direction === null) return filteredRows;
+
+    const { key, direction } = sortConfig;
+    let colIndex: number;
+    
+    if (typeof key === 'number') {
+      colIndex = key;
+    } else {
+      // Map string keys to COLUMNS indices
+      switch (key) {
+        case 'articleNo': colIndex = COLUMNS.ARTICLE_NO; break;
+        case 'articleName': colIndex = COLUMNS.ARTICLE_NAME; break;
+        case 'line': colIndex = COLUMNS.LINE; break;
+        case 'classification': colIndex = COLUMNS.CLASSIFICATION; break;
+        case 'productType': colIndex = COLUMNS.PRODUCT_TYPE; break;
+        case 'unitsOuter': colIndex = COLUMNS.UNITS_OUTER; break;
+        case 'outerW': colIndex = COLUMNS.OUTER_W; break;
+        case 'outerL': colIndex = COLUMNS.OUTER_L; break;
+        case 'outerH': colIndex = COLUMNS.OUTER_H; break;
+        default: return filteredRows;
+      }
+    }
+
+    const sorted = [...filteredRows].sort((a, b) => {
+      const valA = a.row[colIndex];
+      const valB = b.row[colIndex];
+
+      // Handle null/undefined
+      if (valA === valB) return 0;
+      if (valA === null || valA === undefined || valA === '') return 1;
+      if (valB === null || valB === undefined || valB === '') return -1;
+
+      // Handle numeric comparison
+      const numA = typeof valA === 'number' ? valA : parseFloat(String(valA).replace(',', '.'));
+      const numB = typeof valB === 'number' ? valB : parseFloat(String(valB).replace(',', '.'));
+
+      if (!isNaN(numA) && !isNaN(numB)) {
+        return direction === 'asc' ? numA - numB : numB - numA;
+      }
+
+      // Handle string comparison
+      const strA = String(valA).toLowerCase();
+      const strB = String(valB).toLowerCase();
+      
+      if (strA < strB) return direction === 'asc' ? -1 : 1;
+      if (strA > strB) return direction === 'asc' ? 1 : -1;
+      return 0;
+    });
+
+    return sorted;
+  }, [filteredRows, sortConfig]);
+
+  const handleSort = (key: string | number) => {
+    setSortConfig(prev => {
+      if (prev.key === key) {
+        if (prev.direction === 'asc') return { key, direction: 'desc' };
+        return { key: null, direction: null };
+      }
+      return { key, direction: 'asc' };
+    });
+  };
+
   // ── Inline edit helpers ───────────────────────────────────────────────────
   const startEdit = (rowIndex: number, colIndex: number, currentValue: string) => {
     setEditingCell({ rowIndex, colIndex, value: currentValue });
@@ -691,7 +756,7 @@ export function PricingView({ data, headers, onSaveRow, onCaptureState, onEdit,
 
       {/* ── Table ── */}
       <div className="flex-1 overflow-auto bg-slate-800 rounded-xl border border-slate-700 shadow-xl">
-        {filteredRows.length === 0 ? (
+        {sortedRows.length === 0 ? (
           <div className="flex flex-col items-center justify-center h-64 text-slate-400">
             <CheckCircle2 className="w-12 h-12 text-emerald-500 mb-3" />
             <p className="text-lg font-medium text-emerald-400">No issues found</p>
@@ -699,19 +764,19 @@ export function PricingView({ data, headers, onSaveRow, onCaptureState, onEdit,
           </div>
         ) : (
           <table ref={tableRef} className="w-full text-sm border-collapse table-fixed">
-            <thead className="sticky top-0 z-10 bg-slate-900">
+            <thead className="sticky top-0 z-10 bg-slate-900 border-b border-slate-700">
               <tr>
-                <th style={{ width: columnWidths.articleNo }} className="text-left px-3 py-3 text-xs font-semibold text-slate-400 uppercase tracking-wider border-b border-slate-700 whitespace-nowrap relative">
-                  <div className="flex items-center gap-1">
-                    <span>Art. No.</span>
+                <th style={{ width: columnWidths.articleNo }} className="text-left px-3 py-3 text-xs font-semibold text-slate-400 uppercase tracking-wider whitespace-nowrap relative group cursor-pointer hover:bg-slate-800/50 transition-colors" onClick={() => handleSort('articleNo')}>
+                  <div className="flex items-center justify-between gap-1">
+                    <span className="flex items-center gap-1">Art. No. <SortIcon current={sortConfig.key === 'articleNo' ? sortConfig.direction : null} /></span>
                   </div>
-                  <ResizeHandle onMouseDown={e => handleResizeStart(e, 'articleNo', columnWidths.articleNo)} />
+                  <ResizeHandle onMouseDown={e => { e.stopPropagation(); handleResizeStart(e, 'articleNo', columnWidths.articleNo); }} />
                 </th>
-                <th style={{ width: columnWidths.articleName }} className="text-left px-3 py-3 text-xs font-semibold text-slate-400 uppercase tracking-wider border-b border-slate-700 group relative">
+                <th style={{ width: columnWidths.articleName }} className="text-left px-3 py-3 text-xs font-semibold text-slate-400 uppercase tracking-wider group cursor-pointer hover:bg-slate-800/50 transition-colors relative" onClick={() => handleSort('articleName')}>
                   <div className="flex items-center gap-1">
-                    <span className="truncate">Article Name</span>
+                    <span className="truncate flex items-center gap-1">Article Name <SortIcon current={sortConfig.key === 'articleName' ? sortConfig.direction : null} /></span>
                     <button
-                      onClick={() => setOpenFilter(openFilter === 'name' ? null : 'name')}
+                      onClick={(e) => { e.stopPropagation(); setOpenFilter(openFilter === 'name' ? null : 'name'); }}
                       className={cn(
                         'p-0.5 rounded hover:bg-slate-700 transition-colors shrink-0',
                         nameColFilter ? 'text-blue-400 bg-blue-400/10' : 'text-slate-500 opacity-0 group-hover:opacity-100'
@@ -727,13 +792,13 @@ export function PricingView({ data, headers, onSaveRow, onCaptureState, onEdit,
                       onClose={() => setOpenFilter(null)}
                     />
                   )}
-                  <ResizeHandle onMouseDown={e => handleResizeStart(e, 'articleName', columnWidths.articleName)} />
+                  <ResizeHandle onMouseDown={e => { e.stopPropagation(); handleResizeStart(e, 'articleName', columnWidths.articleName); }} />
                 </th>
-                <th style={{ width: columnWidths.line }} className="text-left px-3 py-3 text-xs font-semibold text-slate-400 uppercase tracking-wider border-b border-slate-700 whitespace-nowrap group relative">
+                <th style={{ width: columnWidths.line }} className="text-left px-3 py-3 text-xs font-semibold text-slate-400 uppercase tracking-wider whitespace-nowrap group cursor-pointer hover:bg-slate-800/50 transition-colors relative" onClick={() => handleSort('line')}>
                   <div className="flex items-center gap-1">
-                    <span className="truncate">Line</span>
+                    <span className="truncate flex items-center gap-1">Line <SortIcon current={sortConfig.key === 'line' ? sortConfig.direction : null} /></span>
                     <button
-                      onClick={() => setOpenFilter(openFilter === 'line' ? null : 'line')}
+                      onClick={(e) => { e.stopPropagation(); setOpenFilter(openFilter === 'line' ? null : 'line'); }}
                       className={cn(
                         'p-0.5 rounded hover:bg-slate-700 transition-colors shrink-0',
                         lineMultiFilter.length > 0 ? 'text-blue-400 bg-blue-400/10' : 'text-slate-500 opacity-0 group-hover:opacity-100'
@@ -752,13 +817,13 @@ export function PricingView({ data, headers, onSaveRow, onCaptureState, onEdit,
                       onClose={() => setOpenFilter(null)}
                     />
                   )}
-                  <ResizeHandle onMouseDown={e => handleResizeStart(e, 'line', columnWidths.line)} />
+                  <ResizeHandle onMouseDown={e => { e.stopPropagation(); handleResizeStart(e, 'line', columnWidths.line); }} />
                 </th>
-                <th style={{ width: columnWidths.classification }} className="text-left px-3 py-3 text-xs font-semibold text-slate-400 uppercase tracking-wider border-b border-slate-700 whitespace-nowrap group relative">
+                <th style={{ width: columnWidths.classification }} className="text-left px-3 py-3 text-xs font-semibold text-slate-400 uppercase tracking-wider whitespace-nowrap group cursor-pointer hover:bg-slate-800/50 transition-colors relative" onClick={() => handleSort('classification')}>
                   <div className="flex items-center gap-1">
-                    <span className="truncate">Classification</span>
+                    <span className="truncate flex items-center gap-1">Classification <SortIcon current={sortConfig.key === 'classification' ? sortConfig.direction : null} /></span>
                     <button
-                      onClick={() => setOpenFilter(openFilter === 'classification' ? null : 'classification')}
+                      onClick={(e) => { e.stopPropagation(); setOpenFilter(openFilter === 'classification' ? null : 'classification'); }}
                       className={cn(
                         'p-0.5 rounded hover:bg-slate-700 transition-colors shrink-0',
                         classificationFilter.length > 0 ? 'text-blue-400 bg-blue-400/10' : 'text-slate-500 opacity-0 group-hover:opacity-100'
@@ -777,21 +842,21 @@ export function PricingView({ data, headers, onSaveRow, onCaptureState, onEdit,
                       onClose={() => setOpenFilter(null)}
                     />
                   )}
-                  <ResizeHandle onMouseDown={e => handleResizeStart(e, 'classification', columnWidths.classification)} />
+                  <ResizeHandle onMouseDown={e => { e.stopPropagation(); handleResizeStart(e, 'classification', columnWidths.classification); }} />
                 </th>
 
-                <th style={{ width: columnWidths.productType }} className="text-left px-3 py-3 text-xs font-semibold text-purple-400 uppercase tracking-wider border-b border-slate-700 whitespace-nowrap relative">
-                  <span>Type</span>
-                  <ResizeHandle onMouseDown={e => handleResizeStart(e, 'productType', columnWidths.productType)} />
+                <th style={{ width: columnWidths.productType }} className="text-left px-3 py-3 text-xs font-semibold text-purple-400 uppercase tracking-wider whitespace-nowrap group cursor-pointer hover:bg-slate-800/50 transition-colors relative" onClick={() => handleSort('productType')}>
+                  <span className="flex items-center gap-1">Type <SortIcon current={sortConfig.key === 'productType' ? sortConfig.direction : null} /></span>
+                  <ResizeHandle onMouseDown={e => { e.stopPropagation(); handleResizeStart(e, 'productType', columnWidths.productType); }} />
                 </th>
 
                 {pricingEditableCols.map(col => {
                   const colKey = `prc_${col.index}`;
                   const width = columnWidths[colKey] ?? 100;
                   return (
-                    <th key={col.index} style={{ width }} className="text-left px-3 py-3 text-xs font-semibold text-blue-400 uppercase tracking-wider border-b border-slate-700 whitespace-nowrap group relative">
+                    <th key={col.index} style={{ width }} className="text-left px-3 py-3 text-xs font-semibold text-blue-400 uppercase tracking-wider whitespace-nowrap group cursor-pointer hover:bg-slate-800/50 transition-colors relative" onClick={() => handleSort(col.index)}>
                       <div className="flex items-center gap-1">
-                        <span className="truncate">{col.name}</span>
+                        <span className="truncate flex items-center gap-1">{col.name} <SortIcon current={sortConfig.key === col.index ? sortConfig.direction : null} /></span>
                         <button
                           onClick={(e) => {
                             e.stopPropagation();
@@ -820,16 +885,16 @@ export function PricingView({ data, headers, onSaveRow, onCaptureState, onEdit,
                           onClose={() => setOpenFilter(null)}
                         />
                       )}
-                      <ResizeHandle onMouseDown={e => handleResizeStart(e, colKey, width)} />
+                      <ResizeHandle onMouseDown={e => { e.stopPropagation(); handleResizeStart(e, colKey, width); }} />
                     </th>
                   );
                 })}
 
-                <th style={{ width: columnWidths.unitsOuter }} className="text-left px-3 py-3 text-xs font-semibold text-slate-400 uppercase tracking-wider border-b border-slate-700 whitespace-nowrap group relative">
+                <th style={{ width: columnWidths.unitsOuter }} className="text-left px-3 py-3 text-xs font-semibold text-slate-400 uppercase tracking-wider whitespace-nowrap group cursor-pointer hover:bg-slate-800/50 transition-colors relative" onClick={() => handleSort('unitsOuter')}>
                   <div className="flex items-center gap-1">
-                    <span className="truncate">Units/Outer</span>
+                    <span className="truncate flex items-center gap-1">Units/Outer <SortIcon current={sortConfig.key === 'unitsOuter' ? sortConfig.direction : null} /></span>
                     <button
-                      onClick={() => setOpenFilter(openFilter === 'unitsOuter' ? null : 'unitsOuter')}
+                      onClick={(e) => { e.stopPropagation(); setOpenFilter(openFilter === 'unitsOuter' ? null : 'unitsOuter'); }}
                       className={cn(
                         'p-0.5 rounded hover:bg-slate-700 transition-colors shrink-0',
                         unitsOuterFilter.length > 0 ? 'text-blue-400 bg-blue-400/10' : 'text-slate-500 opacity-0 group-hover:opacity-100'
@@ -848,14 +913,14 @@ export function PricingView({ data, headers, onSaveRow, onCaptureState, onEdit,
                       onClose={() => setOpenFilter(null)}
                     />
                   )}
-                  <ResizeHandle onMouseDown={e => handleResizeStart(e, 'unitsOuter', columnWidths.unitsOuter)} />
+                  <ResizeHandle onMouseDown={e => { e.stopPropagation(); handleResizeStart(e, 'unitsOuter', columnWidths.unitsOuter); }} />
                 </th>
 
-                <th style={{ width: columnWidths.outerW }} className="text-left px-3 py-3 text-xs font-semibold text-slate-400 uppercase tracking-wider border-b border-slate-700 whitespace-nowrap group relative">
+                <th style={{ width: columnWidths.outerW }} className="text-left px-3 py-3 text-xs font-semibold text-slate-400 uppercase tracking-wider whitespace-nowrap group cursor-pointer hover:bg-slate-800/50 transition-colors relative" onClick={() => handleSort('outerW')}>
                   <div className="flex items-center gap-1">
-                    <span className="truncate">Outer W</span>
+                    <span className="truncate flex items-center gap-1">Outer W <SortIcon current={sortConfig.key === 'outerW' ? sortConfig.direction : null} /></span>
                     <button
-                      onClick={() => setOpenFilter(openFilter === 'outerW' ? null : 'outerW')}
+                      onClick={(e) => { e.stopPropagation(); setOpenFilter(openFilter === 'outerW' ? null : 'outerW'); }}
                       className={cn(
                         'p-0.5 rounded hover:bg-slate-700 transition-colors shrink-0',
                         outerWFilter.length > 0 ? 'text-blue-400 bg-blue-400/10' : 'text-slate-500 opacity-0 group-hover:opacity-100'
@@ -874,14 +939,14 @@ export function PricingView({ data, headers, onSaveRow, onCaptureState, onEdit,
                       onClose={() => setOpenFilter(null)}
                     />
                   )}
-                  <ResizeHandle onMouseDown={e => handleResizeStart(e, 'outerW', columnWidths.outerW)} />
+                  <ResizeHandle onMouseDown={e => { e.stopPropagation(); handleResizeStart(e, 'outerW', columnWidths.outerW); }} />
                 </th>
 
-                <th style={{ width: columnWidths.outerL }} className="text-left px-3 py-3 text-xs font-semibold text-slate-400 uppercase tracking-wider border-b border-slate-700 whitespace-nowrap group relative">
+                <th style={{ width: columnWidths.outerL }} className="text-left px-3 py-3 text-xs font-semibold text-slate-400 uppercase tracking-wider whitespace-nowrap group cursor-pointer hover:bg-slate-800/50 transition-colors relative" onClick={() => handleSort('outerL')}>
                   <div className="flex items-center gap-1">
-                    <span className="truncate">Outer L</span>
+                    <span className="truncate flex items-center gap-1">Outer L <SortIcon current={sortConfig.key === 'outerL' ? sortConfig.direction : null} /></span>
                     <button
-                      onClick={() => setOpenFilter(openFilter === 'outerL' ? null : 'outerL')}
+                      onClick={(e) => { e.stopPropagation(); setOpenFilter(openFilter === 'outerL' ? null : 'outerL'); }}
                       className={cn(
                         'p-0.5 rounded hover:bg-slate-700 transition-colors shrink-0',
                         outerLFilter.length > 0 ? 'text-blue-400 bg-blue-400/10' : 'text-slate-500 opacity-0 group-hover:opacity-100'
@@ -900,14 +965,14 @@ export function PricingView({ data, headers, onSaveRow, onCaptureState, onEdit,
                       onClose={() => setOpenFilter(null)}
                     />
                   )}
-                  <ResizeHandle onMouseDown={e => handleResizeStart(e, 'outerL', columnWidths.outerL)} />
+                  <ResizeHandle onMouseDown={e => { e.stopPropagation(); handleResizeStart(e, 'outerL', columnWidths.outerL); }} />
                 </th>
 
-                <th style={{ width: columnWidths.outerH }} className="text-left px-3 py-3 text-xs font-semibold text-slate-400 uppercase tracking-wider border-b border-slate-700 whitespace-nowrap group relative">
+                <th style={{ width: columnWidths.outerH }} className="text-left px-3 py-3 text-xs font-semibold text-slate-400 uppercase tracking-wider whitespace-nowrap group cursor-pointer hover:bg-slate-800/50 transition-colors relative" onClick={() => handleSort('outerH')}>
                   <div className="flex items-center gap-1">
-                    <span className="truncate">Outer H</span>
+                    <span className="truncate flex items-center gap-1">Outer H <SortIcon current={sortConfig.key === 'outerH' ? sortConfig.direction : null} /></span>
                     <button
-                      onClick={() => setOpenFilter(openFilter === 'outerH' ? null : 'outerH')}
+                      onClick={(e) => { e.stopPropagation(); setOpenFilter(openFilter === 'outerH' ? null : 'outerH'); }}
                       className={cn(
                         'p-0.5 rounded hover:bg-slate-700 transition-colors shrink-0',
                         outerHFilter.length > 0 ? 'text-blue-400 bg-blue-400/10' : 'text-slate-500 opacity-0 group-hover:opacity-100'
@@ -926,16 +991,16 @@ export function PricingView({ data, headers, onSaveRow, onCaptureState, onEdit,
                       onClose={() => setOpenFilter(null)}
                     />
                   )}
-                  <ResizeHandle onMouseDown={e => handleResizeStart(e, 'outerH', columnWidths.outerH)} />
+                  <ResizeHandle onMouseDown={e => { e.stopPropagation(); handleResizeStart(e, 'outerH', columnWidths.outerH); }} />
                 </th>
 
                 {containerCols.map(col => {
                   const colKey = `con_${col.index}`;
                   const width = columnWidths[colKey] ?? 110;
                   return (
-                    <th key={col.index} style={{ width }} className="text-left px-3 py-3 text-xs font-semibold text-orange-400 uppercase tracking-wider border-b border-slate-700 whitespace-nowrap group relative">
+                    <th key={col.index} style={{ width }} className="text-left px-3 py-3 text-xs font-semibold text-orange-400 uppercase tracking-wider whitespace-nowrap group cursor-pointer hover:bg-slate-800/50 transition-colors relative" onClick={() => handleSort(col.index)}>
                       <div className="flex items-center gap-1">
-                        <span className="truncate">{col.name}</span>
+                        <span className="truncate flex items-center gap-1">{col.name} <SortIcon current={sortConfig.key === col.index ? sortConfig.direction : null} /></span>
                         <button
                           onClick={(e) => {
                             e.stopPropagation();
@@ -964,34 +1029,34 @@ export function PricingView({ data, headers, onSaveRow, onCaptureState, onEdit,
                           onClose={() => setOpenFilter(null)}
                         />
                       )}
-                      <ResizeHandle onMouseDown={e => handleResizeStart(e, colKey, width)} />
+                      <ResizeHandle onMouseDown={e => { e.stopPropagation(); handleResizeStart(e, colKey, width); }} />
                     </th>
                   );
                 })}
 
-                <th style={{ width: columnWidths.check }} className="text-left px-3 py-3 text-xs font-semibold text-blue-400 uppercase tracking-wider border-b border-slate-700 whitespace-nowrap relative">
-                  Check
-                  <ResizeHandle onMouseDown={e => handleResizeStart(e, 'check', columnWidths.check)} />
+                <th style={{ width: columnWidths.check }} className="text-left px-3 py-3 text-xs font-semibold text-blue-400 uppercase tracking-wider group cursor-pointer hover:bg-slate-800/50 transition-colors relative" onClick={() => handleSort(COLUMNS.VALIDATED_CHECK)}>
+                  <span className="flex items-center gap-1">Check <SortIcon current={sortConfig.key === COLUMNS.VALIDATED_CHECK ? sortConfig.direction : null} /></span>
+                  <ResizeHandle onMouseDown={e => { e.stopPropagation(); handleResizeStart(e, 'check', columnWidths.check); }} />
                 </th>
 
                 {matrixCols.map(col => {
                   const colKey = `mat_${col.index}`;
                   const width = columnWidths[colKey] ?? 120;
                   return (
-                    <th key={col.index} style={{ width }} className="text-left px-3 py-3 text-xs font-semibold text-slate-400 uppercase tracking-wider border-b border-slate-700 whitespace-nowrap group relative" title={col.name}>
-                      <span className="truncate block">{col.name}</span>
-                      <ResizeHandle onMouseDown={e => handleResizeStart(e, colKey, width)} />
+                    <th key={col.index} style={{ width }} className="text-left px-3 py-3 text-xs font-semibold text-slate-400 uppercase tracking-wider whitespace-nowrap group cursor-pointer hover:bg-slate-800/50 transition-colors relative" title={col.name} onClick={() => handleSort(col.index)}>
+                      <span className="truncate flex items-center gap-1">{col.name} <SortIcon current={sortConfig.key === col.index ? sortConfig.direction : null} /></span>
+                      <ResizeHandle onMouseDown={e => { e.stopPropagation(); handleResizeStart(e, colKey, width); }} />
                     </th>
                   );
                 })}
 
                 <th style={{ width: columnWidths.actions }} className="px-3 py-3 border-b border-slate-700 sticky right-0 bg-slate-900 shadow-[-4px_0_8px_rgba(0,0,0,0.2)]">
-                  <ResizeHandle onMouseDown={e => handleResizeStart(e, 'actions', columnWidths.actions)} />
+                  <ResizeHandle onMouseDown={e => { e.stopPropagation(); handleResizeStart(e, 'actions', columnWidths.actions); }} />
                 </th>
               </tr>
             </thead>
             <tbody>
-              {filteredRows.map(({ row, dataIndex, pricingErrors, unitErrors, isCritical }) => {
+              {sortedRows.map(({ row, dataIndex, pricingErrors, unitErrors, isCritical }) => {
                 const saveStatus = rowStatuses[String(row[COLUMNS.ARTICLE_NO])];
                 const isValidated = !!row[COLUMNS.VALIDATED_CHECK];
                 const note = String(row[COLUMNS.VALIDATED_NOTE] || '');
@@ -1247,6 +1312,22 @@ function TextFilterPopover({ value, onChange, onClose }: {
   );
 }
 
+// ── Sort Icon Helper ───────────────────────────────────────────────────
+function SortIcon({ current }: { current: 'asc' | 'desc' | null }) {
+  return (
+    <span className="inline-flex flex-col ml-1">
+      <ChevronDown className={cn(
+        "w-2.5 h-2.5 -mb-0.5 transition-colors",
+        current === 'asc' ? "text-blue-400 rotate-180" : "text-slate-600 group-hover:text-slate-400"
+      )} />
+      <ChevronDown className={cn(
+        "w-2.5 h-2.5 transition-colors",
+        current === 'desc' ? "text-blue-400" : "text-slate-600 group-hover:text-slate-400"
+      )} />
+    </span>
+  );
+}
+
 // ── Resize Handle Component ─────────────────────────────────────────────
 function ResizeHandle({ onMouseDown }: { onMouseDown: (e: React.MouseEvent) => void }) {
   return (