feat(visualizer): improve chart interactions

- Rename Drift → Trade in UI\n- Dynamic price precision for low prices\n- Fib retracement: select + move in X+Y\n- Ctrl+wheel vertical zoom, Ctrl+drag vertical pan\n- Auto Scale toggle for price scale

apps/visualizer/src/features/chart/ChartToolbar.tsx

@@ -5,6 +5,8 @@ type Props = {
   onTimeframeChange: (tf: string) => void;
   showIndicators: boolean;
   onToggleIndicators: () => void;
+  priceAutoScale: boolean;
+  onTogglePriceAutoScale: () => void;
   seriesLabel: string;
   isFullscreen: boolean;
   onToggleFullscreen: () => void;
@@ -17,6 +19,8 @@ export default function ChartToolbar({
   onTimeframeChange,
   showIndicators,
   onToggleIndicators,
+  priceAutoScale,
+  onTogglePriceAutoScale,
   seriesLabel,
   isFullscreen,
   onToggleFullscreen,
@@ -41,6 +45,9 @@ export default function ChartToolbar({
         <Button size="sm" variant={showIndicators ? 'primary' : 'ghost'} onClick={onToggleIndicators} type="button">
           Indicators
         </Button>
+        <Button size="sm" variant={priceAutoScale ? 'primary' : 'ghost'} onClick={onTogglePriceAutoScale} type="button">
+          Auto Scale
+        </Button>
         <Button size="sm" variant={isFullscreen ? 'primary' : 'ghost'} onClick={onToggleFullscreen} type="button">
           {isFullscreen ? 'Exit' : 'Fullscreen'}
         </Button>