Complete infrastructure reorganization to role-based structure

- Created all missing admin pages (users, settings, events, members, payments)
- Created board pages (governance, meetings)
- Updated dashboard router to use new /admin, /board, /member structure
- Added isMember alias to useAuth composable for consistency
- All pages now use correct role-based layouts and middleware
- Build verified successfully

The platform now has a clean separation:
- /admin/* - Administrator dashboard and tools
- /board/* - Board member governance and meetings
- /member/* - Member portal and resources

Next steps: Complete remaining member pages and clean up old dashboard files

composables/useAuth.ts

@@ -41,6 +41,9 @@ export const useAuth = () => {
     // Fallback to legacy tier system
     return user.value?.tier === 'user';
   });
+  
+  // Alias for consistency with new naming convention
+  const isMember = isUser;
 
   const isBoard = computed(() => {
     // Check new realm roles first
@@ -300,6 +303,7 @@ export const useAuth = () => {
     // Tier-based properties
     userTier,
     isUser,
+    isMember,  // Alias for isUser, better naming convention
     isBoard,
     isAdmin,
     firstName,