feat(chart): overlay DLOB quotes + layers

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

@@ -6,12 +6,13 @@ import ChartSideToolbar from './ChartSideToolbar';
 import ChartToolbar from './ChartToolbar';
 import TradingChart from './TradingChart';
 import type { FibAnchor, FibRetracement } from './FibRetracementPrimitive';
-import type { IChartApi } from 'lightweight-charts';
+import { LineStyle, type IChartApi } from 'lightweight-charts';
 import type { OverlayLayer } from './ChartPanel.types';
 
 type Props = {
   candles: Candle[];
   indicators: ChartIndicators;
+  dlobQuotes?: { bid: number | null; ask: number | null; mid: number | null } | null;
   timeframe: string;
   bucketSeconds: number;
   seriesKey: string;
@@ -45,6 +46,7 @@ function isEditableTarget(t: EventTarget | null): boolean {
 export default function ChartPanel({
   candles,
   indicators,
+  dlobQuotes,
   timeframe,
   bucketSeconds,
   seriesKey,
@@ -61,6 +63,7 @@ export default function ChartPanel({
   const [fib, setFib] = useState<FibRetracement | null>(null);
   const [fibDraft, setFibDraft] = useState<FibRetracement | null>(null);
   const [layers, setLayers] = useState<OverlayLayer[]>([
+    { id: 'dlob-quotes', name: 'DLOB Quotes', visible: true, locked: false, opacity: 0.9 },
     { id: 'drawings', name: 'Drawings', visible: true, locked: false, opacity: 1 },
   ]);
   const [layersOpen, setLayersOpen] = useState(false);
@@ -196,6 +199,37 @@ export default function ChartPanel({
     return Math.max(0, Math.min(1, v));
   }
 
+  const quotesLayer = useMemo(() => layers.find((l) => l.id === 'dlob-quotes'), [layers]);
+  const quotesVisible = Boolean(quotesLayer?.visible);
+  const quotesOpacity = clamp01(quotesLayer?.opacity ?? 1);
+
+  const priceLines = useMemo(() => {
+    if (!quotesVisible) return [];
+    return [
+      {
+        id: 'dlob-bid',
+        title: 'DLOB Bid',
+        price: dlobQuotes?.bid ?? null,
+        color: `rgba(34,197,94,${quotesOpacity})`,
+        lineStyle: LineStyle.Dotted,
+      },
+      {
+        id: 'dlob-mid',
+        title: 'DLOB Mid',
+        price: dlobQuotes?.mid ?? null,
+        color: `rgba(230,233,239,${quotesOpacity})`,
+        lineStyle: LineStyle.Dashed,
+      },
+      {
+        id: 'dlob-ask',
+        title: 'DLOB Ask',
+        price: dlobQuotes?.ask ?? null,
+        color: `rgba(239,68,68,${quotesOpacity})`,
+        lineStyle: LineStyle.Dotted,
+      },
+    ];
+  }, [dlobQuotes?.ask, dlobQuotes?.bid, dlobQuotes?.mid, quotesOpacity, quotesVisible]);
+
   function updateLayer(layerId: string, patch: Partial<OverlayLayer>) {
     setLayers((prev) => prev.map((l) => (l.id === layerId ? { ...l, ...patch } : l)));
   }
@@ -309,6 +343,7 @@ export default function ChartPanel({
               showBuild={showBuild}
               bucketSeconds={bucketSeconds}
               seriesKey={seriesKey}
+              priceLines={priceLines}
               fib={fibRenderable}
               fibOpacity={fibEffectiveOpacity}
               fibSelected={fibSelected}