feat: implement excel-style drag-to-select and shift-click in Dimensions and filters

src/components/ColumnFilterPopover.tsx

@@ -27,6 +27,7 @@ export function ColumnFilterPopover({
   const [isDragging, setIsDragging] = useState(false);
   const [dragStart, setDragStart] = useState<number | null>(null);
   const [hoveredIndex, setHoveredIndex] = useState<number | null>(null);
+  const [lastClickedIndex, setLastClickedIndex] = useState<number | null>(null);
   const listRef = React.useRef<HTMLDivElement>(null);
   
   const filteredValues = useMemo(() => {
@@ -134,10 +135,23 @@ export function ColumnFilterPopover({
               tabIndex={0}
               onMouseDown={(e) => { e.preventDefault(); handleMouseDown(idx); }}
               onMouseEnter={() => handleMouseEnter(idx)}
-              onClick={(e) => { if (!isDragging) onToggle(val); }}
-              onKeyDown={(e) => { if (e.key === ' ' || e.key === 'Enter') { e.preventDefault(); onToggle(val); } }}
+              onClick={(e) => {
+                if (isDragging) return;
+                
+                if (e.shiftKey && lastClickedIndex !== null) {
+                  const start = Math.min(lastClickedIndex, idx);
+                  const end = Math.max(lastClickedIndex, idx);
+                  const itemsToSelect = filteredValues.slice(start, end + 1);
+                  const newSelected = new Set([...selectedValues, ...itemsToSelect]);
+                  onSelectAll(Array.from(newSelected));
+                } else {
+                  onToggle(val);
+                }
+                setLastClickedIndex(idx);
+              }}
+              onKeyDown={(e) => { if (e.key === ' ' || e.key === 'Enter') { e.preventDefault(); onToggle(val); setLastClickedIndex(idx); } }}
               className={cn(
-                "flex items-center gap-2 p-1.5 rounded cursor-pointer group transition-colors",
+                "flex items-center gap-2 p-1.5 rounded cursor-pointer group transition-colors select-none",
                 isDragSelected ? "bg-blue-600/40" : "hover:bg-slate-700/50"
               )}
             >