⚡ Bolt: Cache IconifyIcon resolution

.jules/bolt.md

@@ -0,0 +1 @@
+## 2024-06-08 - IconifyIcon Performance Bottleneck\n**Learning:** The IconifyIcon component was doing O(N) array iteration lookups over all icon sets on every render for prefix-less icons, which is a performance bottleneck in React 19 / MUI applications.\n**Action:** Use a Map to cache iconData resolution to prevent performance-blocking lookups.

client/src/components/base/IconifyIcon.tsx

@@ -33,18 +33,35 @@ const iconSets: Record<string, IconifyJSON> = {
   "mdi-light": mdiLightIcons,
 };
 
+// ⚡ Bolt: Cache icon resolution to avoid O(N) iteration over iconSets on every render
+const iconCache = new Map<string, ReturnType<typeof getIconData>>();
+
 const iconData = (icon: string) => {
+  if (iconCache.has(icon)) {
+    return iconCache.get(icon);
+  }
+
   const [prefix, name] = icon.includes(":") ? icon.split(":") : ["", icon];
 
   if (prefix && iconSets[prefix]) {
     const data = getIconData(iconSets[prefix], name);
-    if (data) return data;
+    if (data) {
+      iconCache.set(icon, data);
+      return data;
+    }
   }
 
   for (const [_, icons] of Object.entries(iconSets)) {
     const data = getIconData(icons, name);
-    if (data) return data;
+    if (data) {
+      iconCache.set(icon, data);
+      return data;
+    }
   }
+
+  // Cache negative result to avoid re-searching missing icons
+  iconCache.set(icon, null);
+  return undefined;
 };
 
 const IconifyIcon = ({