Fix: handle null modelDraws gracefully

src/charts/ModelDrawsComparison.jsx

@@ -36,7 +36,8 @@ export default function ModelDrawsComparison({ data, waves, districtName }) {
   }, [data.waves])
 
   const quadModels = data.quadData || {}
-  const modelDraws = data.modelDraws || {}
+  // modelDraws may be null if API unavailable, handle gracefully
+  const modelDraws = data.modelDraws || null
 
   // Compute max arrests for Y-axis scaling across all quadrants and years
   const allArrestValues = []
@@ -53,8 +54,9 @@ export default function ModelDrawsComparison({ data, waves, districtName }) {
     })
   })
 
-  // Add draw values if available
-  Object.values(modelDraws).forEach(groups => {
+  // Add draw values if available (when modelDraws is populated)
+  const drawValues = modelDraws || {}
+  Object.values(drawValues).forEach(groups => {
     Object.values(groups).forEach(draws => {
       if (draws && draws.length > 0) {
         allArrestValues.push(...draws)