feat: auth & admin

.agents/skills/vercel-react-best-practices/rules/server-parallel-nested-fetching.md

@@ -12,13 +12,11 @@ When fetching nested data in parallel, chain dependent fetches within each item'
 **Incorrect (a single slow item blocks all nested fetches):**
 
 ```tsx
-const chats = await Promise.all(
-  chatIds.map(id => getChat(id))
-)
+const chats = await Promise.all(chatIds.map((id) => getChat(id)));
 
 const chatAuthors = await Promise.all(
-  chats.map(chat => getUser(chat.author))
-)
+  chats.map((chat) => getUser(chat.author)),
+);
 ```
 
 If one `getChat(id)` out of 100 is extremely slow, the authors of the other 99 chats can't start loading even though their data is ready.
@@ -27,8 +25,8 @@ If one `getChat(id)` out of 100 is extremely slow, the authors of the other 99 c
 
 ```tsx
 const chatAuthors = await Promise.all(
-  chatIds.map(id => getChat(id).then(chat => getUser(chat.author)))
-)
+  chatIds.map((id) => getChat(id).then((chat) => getUser(chat.author))),
+);
 ```
 
 Each item independently chains `getChat` → `getUser`, so a slow chat doesn't block author fetches for the others.