feat: auth & admin

.agents/skills/vercel-react-best-practices/rules/js-cache-function-results.md

@@ -18,7 +18,7 @@ function ProjectList({ projects }: { projects: Project[] }) {
       {projects.map(project => {
         // slugify() called 100+ times for same project names
         const slug = slugify(project.name)
-        
+
         return <ProjectCard key={project.id} slug={slug} />
       })}
     </div>
@@ -47,7 +47,7 @@ function ProjectList({ projects }: { projects: Project[] }) {
       {projects.map(project => {
         // Computed only once per unique project name
         const slug = cachedSlugify(project.name)
-        
+
         return <ProjectCard key={project.id} slug={slug} />
       })}
     </div>
@@ -58,20 +58,20 @@ function ProjectList({ projects }: { projects: Project[] }) {
 **Simpler pattern for single-value functions:**
 
 ```typescript
-let isLoggedInCache: boolean | null = null
+let isLoggedInCache: boolean | null = null;
 
 function isLoggedIn(): boolean {
   if (isLoggedInCache !== null) {
-    return isLoggedInCache
+    return isLoggedInCache;
   }
-  
-  isLoggedInCache = document.cookie.includes('auth=')
-  return isLoggedInCache
+
+  isLoggedInCache = document.cookie.includes('auth=');
+  return isLoggedInCache;
 }
 
 // Clear cache when auth changes
 function onAuthChange() {
-  isLoggedInCache = null
+  isLoggedInCache = null;
 }
 ```