feat: instrument analysis

frontend/src/components/InstrumentChart.tsx

@@ -73,9 +73,11 @@ export default function InstrumentChart({ priceData, indicators, events = [], he
   const containerRef    = useRef<HTMLDivElement>(null)
   const cleanupRef      = useRef<(() => void) | null>(null)
   const onHoverRef      = useRef(onDateHover)
+  const onChartReadyRef = useRef(onChartReady)
 
-  // Keep callback ref fresh without triggering chart rebuild
+  // Keep callback refs fresh without triggering chart rebuild
   useEffect(() => { onHoverRef.current = onDateHover }, [onDateHover])
+  useEffect(() => { onChartReadyRef.current = onChartReady }, [onChartReady])
 
   useEffect(() => {
     cleanupRef.current?.()
@@ -211,9 +213,9 @@ export default function InstrumentChart({ priceData, indicators, events = [], he
       chart.timeScale().fitContent()
 
       // Expose coordinate mapping so siblings can align with the chart x-axis
-      if (onChartReady && containerRef.current) {
+      if (onChartReadyRef.current && containerRef.current) {
         const canvasLeft = containerRef.current.getBoundingClientRect().left
-        onChartReady((d: string) => chart.timeScale().timeToCoordinate(d as any), canvasLeft)
+        onChartReadyRef.current((d: string) => chart.timeScale().timeToCoordinate(d as any), canvasLeft)
       }
 
       // ── Star overlay — ★ icons positioned via chart coordinate API ────────
@@ -326,7 +328,7 @@ export default function InstrumentChart({ priceData, indicators, events = [], he
         chart.timeScale().unsubscribeVisibleLogicalRangeChange(renderStars)
         if (starsOverlay.parentNode) starsOverlay.parentNode.removeChild(starsOverlay)
         chart.remove()
-        onChartReady?.(null as any, 0)
+        onChartReadyRef.current?.(null as any, 0)
       }
     })
 
@@ -335,7 +337,7 @@ export default function InstrumentChart({ priceData, indicators, events = [], he
       cleanupRef.current?.()
       cleanupRef.current = null
     }
-  }, [priceData, indicators, events, height, chartType, theoryCurve, onChartReady])
+  }, [priceData, indicators, events, height, chartType, theoryCurve])
 
   return (
     <div className="bg-dark-900/60 rounded-xl border border-slate-700/40 overflow-hidden">

frontend/src/pages/InstrumentDashboard.tsx

@@ -10,6 +10,9 @@ import InstrumentChart, { TheoPoint } from '../components/InstrumentChart'
 
 const api = axios.create({ baseURL: '/api' })
 
+// Stable empty array — prevents InstrumentChart useEffect from re-running on every render
+const NO_CHART_EVENTS: never[] = []
+
 // ── Types ─────────────────────────────────────────────────────────────────────
 
 interface CausalTemplate {
@@ -1283,7 +1286,7 @@ export default function InstrumentDashboard() {
           <InstrumentChart
             priceData={snapshot.price_data}
             indicators={snapshot.indicators}
-            events={[]}
+            events={NO_CHART_EVENTS}
             height={420}
             chartType={chartStyle}
             onDateHover={handleDateHover}