feat: auth & admin

.agents/skills/vercel-react-best-practices/rules/server-dedup-props.md

@@ -22,11 +22,11 @@ RSC→client serialization deduplicates by object reference, not value. Same ref
 
 ```tsx
 // RSC: send once
-<ClientList usernames={usernames} />
+<ClientList usernames={usernames} />;
 
 // Client: transform there
-'use client'
-const sorted = useMemo(() => [...usernames].sort(), [usernames])
+('use client');
+const sorted = useMemo(() => [...usernames].sort(), [usernames]);
 ```
 
 **Nested deduplication behavior:**