feat: auth & admin

.agents/skills/vercel-react-best-practices/rules/client-localstorage-schema.md

@@ -13,18 +13,18 @@ Add version prefix to keys and store only needed fields. Prevents schema conflic
 
 ```typescript
 // No version, stores everything, no error handling
-localStorage.setItem('userConfig', JSON.stringify(fullUserObject))
-const data = localStorage.getItem('userConfig')
+localStorage.setItem('userConfig', JSON.stringify(fullUserObject));
+const data = localStorage.getItem('userConfig');
 ```
 
 **Correct:**
 
 ```typescript
-const VERSION = 'v2'
+const VERSION = 'v2';
 
 function saveConfig(config: { theme: string; language: string }) {
   try {
-    localStorage.setItem(`userConfig:${VERSION}`, JSON.stringify(config))
+    localStorage.setItem(`userConfig:${VERSION}`, JSON.stringify(config));
   } catch {
     // Throws in incognito/private browsing, quota exceeded, or disabled
   }
@@ -32,21 +32,24 @@ function saveConfig(config: { theme: string; language: string }) {
 
 function loadConfig() {
   try {
-    const data = localStorage.getItem(`userConfig:${VERSION}`)
-    return data ? JSON.parse(data) : null
+    const data = localStorage.getItem(`userConfig:${VERSION}`);
+    return data ? JSON.parse(data) : null;
   } catch {
-    return null
+    return null;
   }
 }
 
 // Migration from v1 to v2
 function migrate() {
   try {
-    const v1 = localStorage.getItem('userConfig:v1')
+    const v1 = localStorage.getItem('userConfig:v1');
     if (v1) {
-      const old = JSON.parse(v1)
-      saveConfig({ theme: old.darkMode ? 'dark' : 'light', language: old.lang })
-      localStorage.removeItem('userConfig:v1')
+      const old = JSON.parse(v1);
+      saveConfig({
+        theme: old.darkMode ? 'dark' : 'light',
+        language: old.lang,
+      });
+      localStorage.removeItem('userConfig:v1');
     }
   } catch {}
 }
@@ -58,10 +61,13 @@ function migrate() {
 // User object has 20+ fields, only store what UI needs
 function cachePrefs(user: FullUser) {
   try {
-    localStorage.setItem('prefs:v1', JSON.stringify({
-      theme: user.preferences.theme,
-      notifications: user.preferences.notifications
-    }))
+    localStorage.setItem(
+      'prefs:v1',
+      JSON.stringify({
+        theme: user.preferences.theme,
+        notifications: user.preferences.notifications,
+      }),
+    );
   } catch {}
 }
 ```