feat: implement real user login state and fix profile view

pages/UserDetail.tsx

@@ -20,11 +20,12 @@ export const UserDetail: React.FC = () => {
       
       const loadData = async () => {
         try {
+          const tenantId = localStorage.getItem('ctms_tenant_id') || CURRENT_TENANT_ID;
           const u = await getUserById(id);
           setUser(u);
           
           if (u) {
-            const data = await getAttendances(CURRENT_TENANT_ID, { 
+            const data = await getAttendances(tenantId, { 
               userId: id, 
               dateRange: { start: new Date(0), end: new Date() } // All time
             });