⚡ Bolt: [performance improvement] Cache Iconify icon lookups

.jules/bolt.md

@@ -0,0 +1,3 @@
+## 2024-05-24 - [Global Caching for IconifyIcon Lookups]
+**Learning:** Prefix-less icon lookups in `IconifyIcon.tsx` iterate over multiple large icon sets on every render. Because the component is used heavily (192 times in the project), this linear lookup becomes a rendering bottleneck.
+**Action:** Implement a simple global memoization cache (`Map<string, any>`) for `iconData` resolution to make icon object lookups O(1) on subsequent renders, avoiding redundant iterations across icon sets.

client/src/components/base/IconifyIcon.tsx

@@ -33,18 +33,35 @@ const iconSets: Record<string, IconifyJSON> = {
   "mdi-light": mdiLightIcons,
 };
 
+const iconCache = new Map<string, any>();
+
+// ⚡ Bolt: Cache icon lookups to prevent O(n) iteration across icon sets on every render
 const iconData = (icon: string) => {
+  if (iconCache.has(icon)) {
+    return iconCache.get(icon);
+  }
+
   const [prefix, name] = icon.includes(":") ? icon.split(":") : ["", icon];
 
+  let result;
   if (prefix && iconSets[prefix]) {
-    const data = getIconData(iconSets[prefix], name);
-    if (data) return data;
+    result = getIconData(iconSets[prefix], name);
+  }
+
+  if (!result) {
+    for (const [_, icons] of Object.entries(iconSets)) {
+      const data = getIconData(icons, name);
+      if (data) {
+        result = data;
+        break;
+      }
+    }
   }
 
-  for (const [_, icons] of Object.entries(iconSets)) {
-    const data = getIconData(icons, name);
-    if (data) return data;
+  if (result) {
+    iconCache.set(icon, result);
   }
+  return result;
 };
 
 const IconifyIcon = ({