feat(iam): add GET /api/admin/users endpoint for all-users overview

eeg_backend/src/main/java/at/mueller/eeg/backend/iam/api/AdminIamController.java

@@ -31,6 +31,23 @@ public class AdminIamController {
     private final AdminIamService adminIamService;
     private final UserMapper userMapper;
 
+    @GetMapping
+    @Operation(summary = "Lädt alle User",
+            description = "Zeigt alle registrierten Benutzer sortiert nach Erstellungsdatum (neueste zuerst).")
+    @ApiResponse(
+            responseCode = "200",
+            description = "Liste aller Benutzer erfolgreich geladen",
+            content = @Content(
+                    mediaType = MediaType.APPLICATION_JSON_VALUE,
+                    array = @ArraySchema(
+                            schema = @Schema(implementation = UserProfileResponse.class)
+                    )
+            )
+    )
+    public ResponseEntity<List<UserProfileResponse>> getAllUsers() {
+        return ResponseEntity.ok(userMapper.mapToDto(adminIamService.getAllUsers()));
+    }
+
     @GetMapping("/pending")
     @Operation(summary = "Lädt alle wartenden User",
             description = "Zeigt User im Status PENDING inkl. der Ergebnisse des EDA-Netz-Checks.")

eeg_backend/src/test/java/at/mueller/eeg/backend/iam/api/AdminIamControllerTest.java

@@ -0,0 +1,73 @@
+package at.mueller.eeg.backend.iam.api;
+
+import at.mueller.eeg.backend.iam.api.dto.IamDtos.UserProfileResponse;
+import at.mueller.eeg.backend.iam.domain.User;
+import at.mueller.eeg.backend.iam.mapper.UserMapper;
+import at.mueller.eeg.backend.iam.service.AdminIamService;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+import org.springframework.http.ResponseEntity;
+
+import java.util.List;
+import java.util.UUID;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.*;
+
+@ExtendWith(MockitoExtension.class)
+class AdminIamControllerTest {
+
+    @Mock
+    private AdminIamService adminIamService;
+
+    @Mock
+    private UserMapper userMapper;
+
+    @InjectMocks
+    private AdminIamController adminIamController;
+
+    @Test
+    void getAllUsers() {
+        User user1 = new User();
+        user1.setId(UUID.randomUUID());
+        user1.setEmail("alice@example.com");
+
+        User user2 = new User();
+        user2.setId(UUID.randomUUID());
+        user2.setEmail("bob@example.com");
+
+        when(adminIamService.getAllUsers()).thenReturn(List.of(user1, user2));
+
+        UserProfileResponse dto1 = new UserProfileResponse(
+                user1.getId(), null, "Alice", "Test",
+                null, "alice@example.com", "APPROVED");
+        UserProfileResponse dto2 = new UserProfileResponse(
+                user2.getId(), null, "Bob", "Test",
+                null, "bob@example.com", "PENDING");
+
+        when(userMapper.mapToDto(List.of(user1, user2))).thenReturn(List.of(dto1, dto2));
+
+        ResponseEntity<List<UserProfileResponse>> result = adminIamController.getAllUsers();
+
+        assertEquals(200, result.getStatusCode().value());
+        assertEquals(2, result.getBody().size());
+        assertEquals("alice@example.com", result.getBody().get(0).email());
+        assertEquals("bob@example.com", result.getBody().get(1).email());
+        verify(adminIamService).getAllUsers();
+        verify(userMapper).mapToDto(List.of(user1, user2));
+    }
+
+    @Test
+    void getAllUsers_empty() {
+        when(adminIamService.getAllUsers()).thenReturn(List.of());
+        when(userMapper.mapToDto(List.of())).thenReturn(List.of());
+
+        ResponseEntity<List<UserProfileResponse>> result = adminIamController.getAllUsers();
+
+        assertEquals(200, result.getStatusCode().value());
+        assertTrue(result.getBody().isEmpty());
+    }
+}