Sort member lists by last name instead of first name

- Updated member-list.vue to sort by last name with new sort options
- Changed default sort to lastname-asc
- Added Last Name and First Name sort options in dropdown
- Updated board/members/index.vue to include name field and sort by last name
- Updated admin/members/index.vue to include name field and sort by last name
- All member lists now consistently sort alphabetically by last name

pages/dashboard/member-list.vue

@@ -285,7 +285,7 @@ const error = ref('');
 const searchTerm = ref('');
 const activeFilter = ref('');
 const duesFilter = ref('');
-const sortOption = ref('name-asc');
+const sortOption = ref('lastname-asc');
 
 // Dialogs
 const showAddDialog = ref(false);
@@ -329,8 +329,10 @@ const duesFilterOptions = [
 
 // Sort options
 const sortOptions = [
-  { title: 'Name (A-Z)', value: 'name-asc' },
-  { title: 'Name (Z-A)', value: 'name-desc' },
+  { title: 'Last Name (A-Z)', value: 'lastname-asc' },
+  { title: 'Last Name (Z-A)', value: 'lastname-desc' },
+  { title: 'First Name (A-Z)', value: 'firstname-asc' },
+  { title: 'First Name (Z-A)', value: 'firstname-desc' },
   { title: 'Nationality (A-Z)', value: 'nationality-asc' },
   { title: 'Nationality (Z-A)', value: 'nationality-desc' }
 ];
@@ -373,11 +375,23 @@ const filteredMembers = computed(() => {
   // Sorting
   if (sortOption.value) {
     filtered.sort((a, b) => {
+      // Extract first and last names properly
+      const getLastName = (member: any) => member.last_name || '';
+      const getFirstName = (member: any) => member.first_name || '';
+      
       switch (sortOption.value) {
-        case 'name-asc':
-          return (a.FullName || '').localeCompare(b.FullName || '');
-        case 'name-desc':
-          return (b.FullName || '').localeCompare(a.FullName || '');
+        case 'lastname-asc': {
+          const lastNameCompare = getLastName(a).localeCompare(getLastName(b));
+          return lastNameCompare !== 0 ? lastNameCompare : getFirstName(a).localeCompare(getFirstName(b));
+        }
+        case 'lastname-desc': {
+          const lastNameCompare = getLastName(b).localeCompare(getLastName(a));
+          return lastNameCompare !== 0 ? lastNameCompare : getFirstName(b).localeCompare(getFirstName(a));
+        }
+        case 'firstname-asc':
+          return getFirstName(a).localeCompare(getFirstName(b));
+        case 'firstname-desc':
+          return getFirstName(b).localeCompare(getFirstName(a));
         case 'nationality-asc':
           return (a.nationality || '').localeCompare(b.nationality || '');
         case 'nationality-desc':