Revert "fix(getUser): prefer stored userinfo over ID token for username claim"

This reverts commit f51f5c8148.

src/client.ts

@@ -329,21 +329,9 @@ export class StuffleIAMClient {
   }
 
   /**
-   * Get current user from stored userinfo or ID token
-   * Prefers stored userinfo (from fetchUserInfo) as it has more claims like username
+   * Get current user from stored ID token
    */
   getUser(): User | null {
-    // First try stored userinfo (has username and other claims from /userinfo endpoint)
-    const storedUser = this.storage.get(STORAGE_KEYS.USER);
-    if (storedUser) {
-      try {
-        return JSON.parse(storedUser) as User;
-      } catch {
-        // Fall through to ID token
-      }
-    }
-
-    // Fallback to ID token (may not have all claims like username)
     const idToken = this.storage.get(STORAGE_KEYS.ID_TOKEN);
     if (!idToken) return null;