Show user full name in navbar and homepage after login

- AuthService: added cacheUser/getCachedUser methods
- AuthService.getUser() prefers cached name over JWT claims
- Login page: fetches full profile from API after login and caches it
- Fixes navbar dropdown and homepage showing email instead of name

app/login/page.js

@@ -28,6 +28,8 @@ import {
   verifyPhone,
   isEmail,
   isPhoneNumber,
+  getOwnerByUserId,
+  getCustomerByUserId,
 } from '../utils/api';
 import AuthService from '../services/AuthService';
 
@@ -92,7 +94,26 @@ export default function LoginPage() {
         AuthService.addToken(token);
         console.log('[Login] Token stored');
 
+        // Fetch user profile to get full name
         const authUser = AuthService.getUser();
+        if (authUser?.id) {
+          try {
+            const isOwner = AuthService.isOwner();
+            const fetchFn = isOwner ? getOwnerByUserId : getCustomerByUserId;
+            const profile = await fetchFn(authUser.id);
+            if (profile) {
+              AuthService.cacheUser({
+                name: profile.fullName || profile.name || `${profile.firstName || ''} ${profile.lastName || ''}`.trim(),
+                email: profile.email || authUser.email,
+                phone: profile.phone || profile.phoneNumber || authUser.phone,
+              });
+              console.log('[Login] User profile cached');
+            }
+          } catch (err) {
+            console.warn('[Login] Failed to fetch profile:', err);
+          }
+        }
+
         const userRole = AuthService.isAdmin() ? 'admin'
                        : AuthService.isOwner() ? 'owner'
                        : 'customer';