feat(dashboard): add pending memberships card to admin overview

- Add pendingMemberships field to AdminStats DTO
- Add 4th card 'Offene Mitgliedsanträge' to admin dashboard
- Rename 'Offene Freigaben' to 'Ausstehende Freischaltungen'
- Update DashboardService to count pending memberships
- Update tests to match new AdminStats structure

eeg_backend/src/main/java/at/mueller/eeg/backend/dashboard/api/dto/DashboardStatsDto.java

@@ -4,6 +4,7 @@ public interface DashboardStatsDto {
     record AdminStats(
             long totalCommunities,
             long pendingUsers,
+            long pendingMemberships,
             long totalActiveMemberships
     ) {}
 

eeg_backend/src/main/java/at/mueller/eeg/backend/dashboard/service/DashboardService.java

@@ -26,9 +26,10 @@ public class DashboardService {
     public DashboardStatsDto.AdminStats getAdminStats() {
         long communities = energyCommunityRepository.count();
         long pendingUsers = userRepository.countByStatusAndEmailVerified(RegistrationStatus.PENDING, true);
+        long pendingMemberships = membershipRepository.countByStatus(MembershipStatus.PENDING);
         long activeMemberships = membershipRepository.countByStatus(MembershipStatus.ACTIVE);
 
-        return new DashboardStatsDto.AdminStats(communities, pendingUsers, activeMemberships);
+        return new DashboardStatsDto.AdminStats(communities, pendingUsers, pendingMemberships, activeMemberships);
     }
 
     public DashboardStatsDto.UserStats getUserStats(UUID userId) {

eeg_backend/src/test/java/at/mueller/eeg/backend/dashboard/api/DashboardControllerTest.java

@@ -25,7 +25,7 @@ class DashboardControllerTest {
 
     @Test
     void getAdminDashboard() {
-        DashboardStatsDto.AdminStats stats = new DashboardStatsDto.AdminStats(5, 3, 12);
+        DashboardStatsDto.AdminStats stats = new DashboardStatsDto.AdminStats(5, 3, 2, 12);
         when(dashboardService.getAdminStats()).thenReturn(stats);
 
         ResponseEntity<DashboardStatsDto.AdminStats> response = dashboardController.getAdminDashboard();
@@ -33,18 +33,20 @@ class DashboardControllerTest {
         assertEquals(200, response.getStatusCode().value());
         assertEquals(5, response.getBody().totalCommunities());
         assertEquals(3, response.getBody().pendingUsers());
+        assertEquals(2, response.getBody().pendingMemberships());
         assertEquals(12, response.getBody().totalActiveMemberships());
     }
 
     @Test
     void getAdminDashboard_empty() {
-        DashboardStatsDto.AdminStats stats = new DashboardStatsDto.AdminStats(0, 0, 0);
+        DashboardStatsDto.AdminStats stats = new DashboardStatsDto.AdminStats(0, 0, 0, 0);
         when(dashboardService.getAdminStats()).thenReturn(stats);
 
         ResponseEntity<DashboardStatsDto.AdminStats> response = dashboardController.getAdminDashboard();
 
         assertEquals(0, response.getBody().totalCommunities());
         assertEquals(0, response.getBody().pendingUsers());
+        assertEquals(0, response.getBody().pendingMemberships());
         assertEquals(0, response.getBody().totalActiveMemberships());
     }
 

eeg_backend/src/test/java/at/mueller/eeg/backend/dashboard/service/DashboardServiceTest.java

@@ -40,12 +40,14 @@ class DashboardServiceTest {
     void getAdminStats_returnsCorrectCounts() {
         when(energyCommunityRepository.count()).thenReturn(5L);
         when(userRepository.countByStatusAndEmailVerified(RegistrationStatus.PENDING, true)).thenReturn(3L);
+        when(membershipRepository.countByStatus(MembershipStatus.PENDING)).thenReturn(2L);
         when(membershipRepository.countByStatus(MembershipStatus.ACTIVE)).thenReturn(10L);
 
         DashboardStatsDto.AdminStats stats = dashboardService.getAdminStats();
 
         assertEquals(5, stats.totalCommunities());
         assertEquals(3, stats.pendingUsers());
+        assertEquals(2, stats.pendingMemberships());
         assertEquals(10, stats.totalActiveMemberships());
     }
 

eeg_frontend/src/app/pages/dashboard-overview/dashboard-overview.html

@@ -8,15 +8,19 @@
     <p class="text-red-600">{{ error() }}</p>
   </div>
 } @else if (role === 'ADMIN' && adminStats(); as stats) {
-  <div class="grid grid-cols-1 sm:grid-cols-3 gap-6">
+  <div class="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-4 gap-6">
     <div class="bg-white rounded-2xl shadow-sm border border-slate-200 p-6">
       <p class="text-sm text-slate-500">Energiegemeinschaften</p>
       <p class="text-3xl font-bold text-slate-800 mt-2">{{ stats.totalCommunities }}</p>
     </div>
     <div class="bg-white rounded-2xl shadow-sm border border-slate-200 p-6">
-      <p class="text-sm text-slate-500">Offene Freigaben</p>
+      <p class="text-sm text-slate-500">Ausstehende Freischaltungen</p>
       <p class="text-3xl font-bold text-slate-800 mt-2">{{ stats.pendingUsers }}</p>
     </div>
+    <div class="bg-white rounded-2xl shadow-sm border border-slate-200 p-6">
+      <p class="text-sm text-slate-500">Offene Mitgliedsanträge</p>
+      <p class="text-3xl font-bold text-slate-800 mt-2">{{ stats.pendingMemberships }}</p>
+    </div>
     <div class="bg-white rounded-2xl shadow-sm border border-slate-200 p-6">
       <p class="text-sm text-slate-500">Aktive Mitgliedschaften</p>
       <p class="text-3xl font-bold text-slate-800 mt-2">{{ stats.totalActiveMemberships }}</p>

eeg_frontend/src/app/services/dashboard.ts

@@ -6,6 +6,7 @@ import {environment} from '../../environments/environment';
 export interface AdminStats {
   totalCommunities: number;
   pendingUsers: number;
+  pendingMemberships: number;
   totalActiveMemberships: number;
 }