diff --git a/ANDROID_KOTLIN_PLAN.md b/ANDROID_KOTLIN_PLAN.md
index 0b07fe0..da1755d 100644
--- a/ANDROID_KOTLIN_PLAN.md
+++ b/ANDROID_KOTLIN_PLAN.md
@@ -325,14 +325,30 @@ Wenn du willst, trage ich die einzelnen Subtickets in unserem lokalen Issue-Trac
     - [x] B3.2: Status-Filter + Archiv
 
 - [ ] B4: Newsletter
-    - [ ] B4.1: Entwurf → Senden Flow mit Preview
-    - [ ] B4.2: Gruppenverwaltung (CRUD)
+    - [x] B4.1: Entwurf → Senden Flow mit Preview
+    - [x] B4.2: Gruppenverwaltung (CRUD)
 
-- [ ] B5: Config / Seiten
-    - [ ] B5.1: Sichern/Zurücksetzen mit Undo
-    - [ ] B5.2: Satzung: PDF-Upload-Feld + native PDF-Viewer
+ - [ ] B5: Config / Seiten
+        - Web‑Status: Die Web‑UI bietet bereits umfassende CMS‑UIs für `cms/startseite`, `cms/vereinsmeisterschaften`, `cms/sportbetrieb` und `cms/einstellungen` (Drag&Drop, CSV‑Import/Export, Tabbed‑UIs, ImageUpload, native‑like Modals). `cms/startseite` speichert `homepage.sections` via `PUT /api/config`, `vereinsmeisterschaften` arbeitet mit CSV‑Export/Import, `sportbetrieb` kapselt Termine/Mannschaften/Spielpläne in Tabs, `einstellungen` ist ein umfangreicher Config‑Editor.
+        - Android‑Status: In der Android‑App sind diese Bereiche derzeit nur rudimentär bzw. als Platzhalter umgesetzt (Startseite, Vereinsmeisterschaften, Sportbetrieb, Einstellungen, Passwort‑Reset‑Diagnose fehlen noch als vollwertige Admin‑Tools).
+        - Konkrete Android‑ToDos (B5.x):
+            - B5.1: `cms/startseite` (Startseiten‑Layout)
+                - Implementieren: Reorderable list + Visibility Toggle, Save → `PUT /api/config` (`homepage.sections`), Lade/Save‑Snackbar, Undo/Historie.
+            - B5.2: `cms/vereinsmeisterschaften`
+                - Implementieren: CSV‑Load/Parser, UI zur Anzeige gruppiert nach Jahr/Kategorie, Modal für Ergebnis‑CRUD, CSV Export via `/api/cms/save-csv`.
+            - B5.3: `cms/sportbetrieb`
+                - Implementieren: Tabbed UI (Termine / Mannschaften / Spielpläne), Wiederverwendung von bestehenden native Komponenten (`TermineScreen`, `MannschaftenScreen`, `SpielplanScreen`) und Admin‑Modi (Add/Edit/Delete).
+            - B5.4: `cms/einstellungen`
+                - Implementieren: Tabbed Config Editor (Vereinsdaten, Training, Trainer, Mitgliedschaft), ImageUpload, PDF‑Feld für Satzung, Validierung + Save/Preview.
+            - B5.5: Roundtrip & Tests
+                - Roundtrip‑Tests: RichText ↔ Web (Quill/HTML), CSV parser/tests für Vereinsmeisterschaften, ViewModel‑Unit‑Tests und Compose‑UI‑smoke tests für Save/Load flows.
 
-- [ ] B6: Diagnostics / Passwort-Reset-Diagnose (Export/Detail)
+ - [ ] B6: Diagnostics / Passwort-Reset-Diagnose (Export/Detail)
+        - Web‑Status: `cms/passwort-reset-diagnose` zeigt vollständige Diagnose‑UI mit Suche, Maskierung, Filter (nur Auffälligkeiten) und listbaren Reset‑Versuchen; Backend: `/api/cms/password-reset-diagnostics` liefert `matchingUsers`, `attempts`, `retentionHours`.
+        - Android‑Status: rudimentär/fehlend — Admin‑Diagnose ist nicht vollständig portiert.
+        - Konkrete Android‑ToDos (B6.x):
+            - B6.1: Implementieren Suche + Filter UI, Rendering der `attempts` mit Zeitstempeln, Status‑Badges und Details.
+            - B6.2: Logs exportieren / share (falls API Export unterstützt) und Datenschutz: E‑Mail Maskierung beibehalten.
 
 - [ ] C1: Offline-/Caching-Strategie (verschlüsselt für geschützte CMS-Daten)
 - [ ] C2: Tests & CI
diff --git a/android-app/app/src/main/java/de/harheimertc/data/ApiService.kt b/android-app/app/src/main/java/de/harheimertc/data/ApiService.kt
index f310e12..01b714f 100644
--- a/android-app/app/src/main/java/de/harheimertc/data/ApiService.kt
+++ b/android-app/app/src/main/java/de/harheimertc/data/ApiService.kt
@@ -403,6 +403,25 @@ data class NewsletterListResponse(
     val success: Boolean = false,
     val newsletters: List<NewsletterDto> = emptyList(),
 )
+data class NewsletterCreateRequest(
+    val title: String,
+    val content: String,
+    val type: String,
+    val targetGroup: String? = null,
+    val sendToExternal: Boolean? = null,
+)
+
+data class NewsletterCreateResponse(
+    val success: Boolean = false,
+    val message: String? = null,
+    val newsletter: NewsletterDto? = null,
+)
+
+data class NewsletterSendResponse(
+    val success: Boolean = false,
+    val message: String? = null,
+    val stats: Map<String, Any>? = null,
+)
 data class NewsletterGroupDto(
     val id: String = "",
     val name: String = "",
@@ -556,6 +575,34 @@ interface ApiService {
     @GET("/api/members")
     suspend fun members(): Response<MembersResponse>
 
+    data class MemberSaveRequest(
+        val id: String? = null,
+        val firstName: String,
+        val lastName: String,
+        val geburtsdatum: String,
+        val email: String? = null,
+        val phone: String? = null,
+        val address: String? = null,
+        val notes: String? = null,
+        val isMannschaftsspieler: Boolean = false,
+        val hasHallKey: Boolean = false,
+    )
+
+    data class BulkImportRequest(val members: List<Map<String, String>>)
+    data class BulkImportResponse(val success: Boolean = false, val summary: Map<String, Int>? = null)
+
+    @POST("/api/members")
+    suspend fun saveMember(@Body request: MemberSaveRequest): Response<AuthMessageResponse>
+
+    @DELETE("/api/members")
+    suspend fun deleteMember(@Body body: Map<String, String>): Response<AuthMessageResponse>
+
+    @POST("/api/members/bulk")
+    suspend fun bulkImportMembers(@Body request: BulkImportRequest): Response<BulkImportResponse>
+
+    @POST("/api/members/toggle-mannschaftsspieler")
+    suspend fun toggleMannschaftsspieler(@Body body: Map<String, String>): Response<Map<String, Any>>
+
     @GET("/api/cms/users/list")
     suspend fun cmsUsers(): Response<CmsUsersResponse>
 
@@ -588,6 +635,27 @@ interface ApiService {
     @GET("/api/newsletter/groups/list")
     suspend fun newsletterGroups(): Response<NewsletterGroupsResponse>
 
+    @POST("/api/newsletter/groups/create")
+    suspend fun createNewsletterGroup(@Body request: Map<String, @JvmSuppressWildcards Any?>): Response<AuthMessageResponse>
+
+    @PUT("/api/newsletter/groups/{id}")
+    suspend fun updateNewsletterGroup(@Path("id") id: String, @Body request: Map<String, @JvmSuppressWildcards Any?>): Response<AuthMessageResponse>
+
+    @DELETE("/api/newsletter/groups/{id}")
+    suspend fun deleteNewsletterGroup(@Path("id") id: String): Response<AuthMessageResponse>
+
+    @POST("/api/newsletter/create")
+    suspend fun createNewsletter(@Body request: NewsletterCreateRequest): Response<NewsletterCreateResponse>
+
+    @PUT("/api/newsletter/{id}")
+    suspend fun updateNewsletter(@Path("id") id: String, @Body request: Map<String, @JvmSuppressWildcards Any?>): Response<NewsletterCreateResponse>
+
+    @POST("/api/newsletter/{id}/send")
+    suspend fun sendNewsletter(@Path("id") id: String): Response<NewsletterSendResponse>
+
+    @DELETE("/api/newsletter/{id}")
+    suspend fun deleteNewsletter(@Path("id") id: String): Response<AuthMessageResponse>
+
     @GET("/api/newsletter/groups/public-list")
     suspend fun publicNewsletterGroups(): Response<NewsletterGroupsResponse>
 
diff --git a/android-app/app/src/main/java/de/harheimertc/repositories/CmsRepository.kt b/android-app/app/src/main/java/de/harheimertc/repositories/CmsRepository.kt
index eb01d3a..9dc3845 100644
--- a/android-app/app/src/main/java/de/harheimertc/repositories/CmsRepository.kt
+++ b/android-app/app/src/main/java/de/harheimertc/repositories/CmsRepository.kt
@@ -143,6 +143,49 @@ class CmsRepository @Inject constructor(
         response.body() ?: de.harheimertc.data.AuthMessageResponse(success = false, message = "Leere Antwort")
     }
 
+    suspend fun createNewsletter(request: de.harheimertc.data.NewsletterCreateRequest): Result<de.harheimertc.data.NewsletterCreateResponse> = runCatching {
+        val response = api.createNewsletter(request)
+        if (!response.isSuccessful) error("Newsletter konnte nicht erstellt werden.")
+        response.body() ?: de.harheimertc.data.NewsletterCreateResponse(success = false, message = "Leere Antwort")
+    }
+
+    suspend fun updateNewsletter(id: String, patch: Map<String, Any?>): Result<de.harheimertc.data.NewsletterCreateResponse> = runCatching {
+        val response = api.updateNewsletter(id, patch)
+        if (!response.isSuccessful) error("Newsletter konnte nicht aktualisiert werden.")
+        response.body() ?: de.harheimertc.data.NewsletterCreateResponse(success = false, message = "Leere Antwort")
+    }
+
+    suspend fun sendNewsletter(id: String): Result<de.harheimertc.data.NewsletterSendResponse> = runCatching {
+        val response = api.sendNewsletter(id)
+        if (!response.isSuccessful) error("Newsletter konnte nicht versendet werden.")
+        response.body() ?: de.harheimertc.data.NewsletterSendResponse(success = false, message = "Leere Antwort")
+    }
+
+    suspend fun deleteNewsletter(id: String): Result<de.harheimertc.data.AuthMessageResponse> = runCatching {
+        val response = api.deleteNewsletter(id)
+        if (!response.isSuccessful) error("Newsletter konnte nicht gelöscht werden.")
+        response.body() ?: de.harheimertc.data.AuthMessageResponse(success = false, message = "Leere Antwort")
+    }
+
+    suspend fun createNewsletterGroup(payload: Map<String, @JvmSuppressWildcards Any?>): Result<de.harheimertc.data.AuthMessageResponse> = runCatching {
+        // use generic POST via Retrofit? build request through create endpoint
+        val response = api.createNewsletterGroup(payload)
+        if (!response.isSuccessful) error("Gruppe konnte nicht erstellt werden.")
+        response.body() ?: de.harheimertc.data.AuthMessageResponse(success = false, message = "Leere Antwort")
+    }
+
+    suspend fun updateNewsletterGroup(id: String, patch: Map<String, Any?>): Result<de.harheimertc.data.AuthMessageResponse> = runCatching {
+        val response = api.updateNewsletterGroup(id, patch)
+        if (!response.isSuccessful) error("Gruppe konnte nicht aktualisiert werden.")
+        response.body() ?: de.harheimertc.data.AuthMessageResponse(success = false, message = "Leere Antwort")
+    }
+
+    suspend fun deleteNewsletterGroup(id: String): Result<de.harheimertc.data.AuthMessageResponse> = runCatching {
+        val response = api.deleteNewsletterGroup(id)
+        if (!response.isSuccessful) error("Gruppe konnte nicht gelöscht werden.")
+        response.body() ?: de.harheimertc.data.AuthMessageResponse(success = false, message = "Leere Antwort")
+    }
+
     suspend fun deleteNews(id: Int): Result<de.harheimertc.data.AuthMessageResponse> = runCatching {
         val response = api.deleteNews(id)
         if (!response.isSuccessful) error("News konnten nicht gelöscht werden.")
diff --git a/android-app/app/src/main/java/de/harheimertc/repositories/MemberAreaRepository.kt b/android-app/app/src/main/java/de/harheimertc/repositories/MemberAreaRepository.kt
index 532cb6a..4c6bbf3 100644
--- a/android-app/app/src/main/java/de/harheimertc/repositories/MemberAreaRepository.kt
+++ b/android-app/app/src/main/java/de/harheimertc/repositories/MemberAreaRepository.kt
@@ -64,6 +64,30 @@ class MemberAreaRepository @Inject constructor(
         if (!response.isSuccessful) error("News konnten nicht gespeichert werden.")
     }
 
+    suspend fun saveMember(request: de.harheimertc.data.ApiService.MemberSaveRequest): Result<de.harheimertc.data.AuthMessageResponse> = runCatching {
+        val response = api.saveMember(request)
+        if (!response.isSuccessful) error("Mitglied konnte nicht gespeichert werden.")
+        response.body() ?: de.harheimertc.data.AuthMessageResponse(success = false, message = "Leere Antwort")
+    }
+
+    suspend fun deleteMember(id: String): Result<de.harheimertc.data.AuthMessageResponse> = runCatching {
+        val response = api.deleteMember(mapOf("id" to id))
+        if (!response.isSuccessful) error("Mitglied konnte nicht gelöscht werden.")
+        response.body() ?: de.harheimertc.data.AuthMessageResponse(success = false, message = "Leere Antwort")
+    }
+
+    suspend fun bulkImport(members: List<Map<String, String>>): Result<de.harheimertc.data.ApiService.BulkImportResponse> = runCatching {
+        val response = api.bulkImportMembers(de.harheimertc.data.ApiService.BulkImportRequest(members))
+        if (!response.isSuccessful) error("Bulk-Import fehlgeschlagen")
+        response.body() ?: de.harheimertc.data.ApiService.BulkImportResponse(success = false)
+    }
+
+    suspend fun toggleMannschaftsspieler(memberId: String): Result<Map<String, Any>> = runCatching {
+        val response = api.toggleMannschaftsspieler(mapOf("memberId" to memberId))
+        if (!response.isSuccessful) error("Status konnte nicht umgeschaltet werden.")
+        response.body() ?: emptyMap()
+    }
+
     suspend fun deleteNews(id: Int): Result<Unit> = runCatching {
         val response = api.deleteNews(id)
         if (!response.isSuccessful) error("News konnten nicht gelöscht werden.")
diff --git a/android-app/app/src/main/java/de/harheimertc/ui/screens/cms/CmsScreens.kt b/android-app/app/src/main/java/de/harheimertc/ui/screens/cms/CmsScreens.kt
index d6fe065..78fc30f 100644
--- a/android-app/app/src/main/java/de/harheimertc/ui/screens/cms/CmsScreens.kt
+++ b/android-app/app/src/main/java/de/harheimertc/ui/screens/cms/CmsScreens.kt
@@ -35,6 +35,7 @@ import androidx.compose.ui.unit.dp
 import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Checkbox
+import androidx.compose.material3.OutlinedTextField
 import androidx.navigation.NavController
 import de.harheimertc.data.CmsUserDto
 import de.harheimertc.data.ConfigResponse
@@ -172,14 +173,173 @@ fun CmsContactRequestsScreen(navController: NavController, showBackNavigation: B
 @Composable
 fun CmsNewsletterScreen(navController: NavController, showBackNavigation: Boolean, viewModel: CmsViewModel = hiltViewModel()) {
     val state by viewModel.state.collectAsState()
+    val loginVm: de.harheimertc.ui.screens.login.LoginViewModel = hiltViewModel()
+    val loginState by loginVm.state.collectAsState()
+    val canWrite = loginState.roles.any { it == "admin" || it == "vorstand" }
+    // dialog state for newsletters
+    var newsletterDialogOpen by remember { mutableStateOf(false) }
+    var editingNewsletter by remember { mutableStateOf<NewsletterDto?>(null) }
+    var nlTitle by remember { mutableStateOf("") }
+    var nlContent by remember { mutableStateOf("") }
+    var nlType by remember { mutableStateOf("subscription") }
+    var nlTargetGroup by remember { mutableStateOf("") }
+    var nlSendToExternal by remember { mutableStateOf(true) }
+
+    // dialog state for groups
+    var groupDialogOpen by remember { mutableStateOf(false) }
+    var editingGroup by remember { mutableStateOf<NewsletterGroupDto?>(null) }
+    var grpName by remember { mutableStateOf("") }
+    var grpDescription by remember { mutableStateOf("") }
+    var grpType by remember { mutableStateOf("subscription") }
+    var grpTargetGroup by remember { mutableStateOf("") }
+    var grpSendToExternal by remember { mutableStateOf(true) }
     CmsPage(navController, showBackNavigation, "Newsletter", "Newsletter und Gruppen") {
         if (state.loading) item { CircularProgressIndicator(color = Primary600) }
+        item {
+            if (canWrite) Button(onClick = {
+                editingNewsletter = null
+                nlTitle = ""
+                nlContent = ""
+                nlType = "subscription"
+                nlTargetGroup = ""
+                nlSendToExternal = true
+                newsletterDialogOpen = true
+            }, modifier = Modifier.fillMaxWidth()) { Text("Newsletter erstellen") }
+        }
+        item {
+            if (canWrite) Button(onClick = {
+                editingGroup = null
+                grpName = ""
+                grpDescription = ""
+                grpType = "subscription"
+                grpTargetGroup = ""
+                grpSendToExternal = true
+                groupDialogOpen = true
+            }, modifier = Modifier.fillMaxWidth()) { Text("Gruppe erstellen") }
+        }
         item { SectionTitle("Newsletter") }
         if (!state.loading && state.newsletters.isEmpty()) item { EmptyCard("Keine Newsletter gefunden.") }
-        items(state.newsletters.size) { index -> NewsletterCard(state.newsletters[index]) }
+        items(state.newsletters.size) { index ->
+            val item = state.newsletters[index]
+            NewsletterCard(item,
+                onEdit = { nl ->
+                    editingNewsletter = nl
+                        nlTitle = nl.title
+                        nlContent = nl.title ?: ""
+                        nlType = "subscription"
+                        nlTargetGroup = ""
+                        nlSendToExternal = true
+                        newsletterDialogOpen = true
+                },
+                onDelete = { id -> viewModel.deleteNewsletter(id) },
+                onSend = { id -> viewModel.sendNewsletter(id) }
+            )
+        }
         item { SectionTitle("Gruppen") }
         if (!state.loading && state.newsletterGroups.isEmpty()) item { EmptyCard("Keine Gruppen gefunden.") }
-        items(state.newsletterGroups.size) { index -> NewsletterGroupCard(state.newsletterGroups[index]) }
+        items(state.newsletterGroups.size) { index ->
+            val group = state.newsletterGroups[index]
+            NewsletterGroupCard(group,
+                onEdit = { g ->
+                    editingGroup = g
+                    grpName = g.name
+                    grpDescription = g.description
+                    grpType = "subscription"
+                    grpTargetGroup = ""
+                    grpSendToExternal = true
+                    groupDialogOpen = true
+                },
+                onDelete = { id -> viewModel.deleteNewsletterGroup(id) }
+            )
+        }
+    }
+
+    // Newsletter create/edit dialog
+    if (newsletterDialogOpen) {
+        AlertDialog(
+            onDismissRequest = { newsletterDialogOpen = false },
+            title = { Text(if (editingNewsletter == null) "Newsletter erstellen" else "Newsletter bearbeiten") },
+            text = {
+                Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
+                    Text("Titel *")
+                    androidx.compose.material3.OutlinedTextField(value = nlTitle, onValueChange = { nlTitle = it })
+                    NativeRichTextEditor(nlContent, { nlContent = it }, "Inhalt *")
+                    Row(verticalAlignment = androidx.compose.ui.Alignment.CenterVertically) {
+                        Checkbox(checked = nlType == "subscription", onCheckedChange = { if (it) nlType = "subscription" else nlType = "group" })
+                        Text("Abonnenten-Newsletter", modifier = Modifier.padding(start = 8.dp))
+                        Spacer(modifier = Modifier.width(12.dp))
+                        Checkbox(checked = nlType == "group", onCheckedChange = { if (it) nlType = "group" else nlType = "subscription" })
+                        Text("Gruppen-Newsletter", modifier = Modifier.padding(start = 8.dp))
+                    }
+                    if (nlType == "group") {
+                        OutlinedTextField(value = nlTargetGroup, onValueChange = { nlTargetGroup = it }, label = { Text("Zielgruppe (Gruppen-ID)") })
+                    } else {
+                        Row(verticalAlignment = androidx.compose.ui.Alignment.CenterVertically) {
+                            Checkbox(checked = nlSendToExternal, onCheckedChange = { nlSendToExternal = it })
+                            Text("Auch an externe Abonnenten senden", modifier = Modifier.padding(start = 8.dp))
+                        }
+                    }
+                }
+            },
+            confirmButton = {
+                Button(onClick = {
+                    // build request
+                    val req = de.harheimertc.data.NewsletterCreateRequest(
+                        title = nlTitle,
+                        content = nlContent,
+                        type = nlType,
+                        targetGroup = if (nlType == "group") nlTargetGroup else null,
+                        sendToExternal = if (nlType == "subscription") nlSendToExternal else null,
+                    )
+                    viewModel.saveNewsletter(req)
+                    newsletterDialogOpen = false
+                }, enabled = !state.saving) { Text(if (state.saving) "Speichert..." else "Speichern") }
+            },
+            dismissButton = { TextButton(onClick = { newsletterDialogOpen = false }) { Text("Abbrechen") } },
+        )
+    }
+
+    // Group create/edit dialog
+    if (groupDialogOpen) {
+        AlertDialog(
+            onDismissRequest = { groupDialogOpen = false },
+            title = { Text(if (editingGroup == null) "Gruppe erstellen" else "Gruppe bearbeiten") },
+            text = {
+                Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
+                    OutlinedTextField(value = grpName, onValueChange = { grpName = it }, label = { Text("Name *") })
+                    OutlinedTextField(value = grpDescription, onValueChange = { grpDescription = it }, label = { Text("Beschreibung") })
+                    Row(verticalAlignment = androidx.compose.ui.Alignment.CenterVertically) {
+                        Checkbox(checked = grpType == "subscription", onCheckedChange = { if (it) grpType = "subscription" else grpType = "group" })
+                        Text("Abonnenten-Gruppe", modifier = Modifier.padding(start = 8.dp))
+                        Spacer(modifier = Modifier.width(12.dp))
+                        Checkbox(checked = grpType == "group", onCheckedChange = { if (it) grpType = "group" else grpType = "subscription" })
+                        Text("Manuelle Gruppe", modifier = Modifier.padding(start = 8.dp))
+                    }
+                    if (grpType == "group") {
+                        OutlinedTextField(value = grpTargetGroup, onValueChange = { grpTargetGroup = it }, label = { Text("Zielgruppe (optional)") })
+                    } else {
+                        Row(verticalAlignment = androidx.compose.ui.Alignment.CenterVertically) {
+                            Checkbox(checked = grpSendToExternal, onCheckedChange = { grpSendToExternal = it })
+                            Text("Auch an externe Abonnenten senden", modifier = Modifier.padding(start = 8.dp))
+                        }
+                    }
+                }
+            },
+            confirmButton = {
+                Button(onClick = {
+                    val payload = mapOf(
+                        "name" to grpName,
+                        "description" to grpDescription,
+                        "type" to grpType,
+                        "targetGroup" to (if (grpType == "group") grpTargetGroup else null),
+                        "sendToExternal" to (if (grpType == "subscription") grpSendToExternal else null),
+                    )
+                    viewModel.createNewsletterGroup(payload)
+                    groupDialogOpen = false
+                }, enabled = !state.saving) { Text(if (state.saving) "Speichert..." else "Speichern") }
+            },
+            dismissButton = { TextButton(onClick = { groupDialogOpen = false }) { Text("Abbrechen") } },
+        )
     }
 }
 
@@ -423,19 +583,31 @@ private fun ContactRequestCard(request: ContactRequestDto) {
 }
 
 @Composable
-private fun NewsletterCard(newsletter: NewsletterDto) {
+private fun NewsletterCard(newsletter: NewsletterDto, onEdit: (NewsletterDto) -> Unit = {}, onDelete: (String) -> Unit = {}, onSend: (String) -> Unit = {}) {
+    val viewModel: CmsViewModel = hiltViewModel()
     DataCard(newsletter.subject.ifBlank { newsletter.title.ifBlank { newsletter.id } }) {
         InfoRow("Status", newsletter.status ?: if (newsletter.sentAt != null) "versendet" else "Entwurf")
         InfoRow("Erstellt", newsletter.createdAt ?: "-")
         InfoRow("Versendet", newsletter.sentAt ?: "-")
+        Row {
+            TextButton(onClick = { onEdit(newsletter) }) { Text("Bearbeiten") }
+            TextButton(onClick = { newsletter.id.takeIf { it.isNotBlank() }?.let { onDelete(it) } }) { Text("Löschen") }
+            if (newsletter.status != "sent") {
+                TextButton(onClick = { newsletter.id.takeIf { it.isNotBlank() }?.let { onSend(it) } }) { Text("Versenden") }
+            }
+        }
     }
 }
 
 @Composable
-private fun NewsletterGroupCard(group: NewsletterGroupDto) {
+private fun NewsletterGroupCard(group: NewsletterGroupDto, onEdit: (NewsletterGroupDto) -> Unit = {}, onDelete: (String) -> Unit = {}) {
     DataCard(group.name.ifBlank { group.id }) {
         InfoRow("Beschreibung", group.description.ifBlank { "-" })
         InfoRow("Abonnenten", group.subscribers.size.toString())
+        Row {
+            TextButton(onClick = { onEdit(group) }) { Text("Bearbeiten") }
+            TextButton(onClick = { group.id.takeIf { it.isNotBlank() }?.let { onDelete(it) } }) { Text("Löschen") }
+        }
     }
 }
 
diff --git a/android-app/app/src/main/java/de/harheimertc/ui/screens/cms/CmsViewModels.kt b/android-app/app/src/main/java/de/harheimertc/ui/screens/cms/CmsViewModels.kt
index bdcd443..bcd39ec 100644
--- a/android-app/app/src/main/java/de/harheimertc/ui/screens/cms/CmsViewModels.kt
+++ b/android-app/app/src/main/java/de/harheimertc/ui/screens/cms/CmsViewModels.kt
@@ -208,6 +208,98 @@ class CmsViewModel @Inject constructor(
         }
     }
 
+    // --- Newsletter (B4)
+    fun saveNewsletter(request: de.harheimertc.data.NewsletterCreateRequest) {
+        viewModelScope.launch {
+            _state.value = _state.value.copy(saving = true, error = null, message = null)
+            repository.createNewsletter(request)
+                .onSuccess { res ->
+                    val newslettersRes = repository.newsletters()
+                    _state.value = _state.value.copy(
+                        saving = false,
+                        newsletters = newslettersRes.getOrNull()?.newsletters.orEmpty(),
+                        message = res.message ?: "Newsletter gespeichert",
+                    )
+                }
+                .onFailure { err ->
+                    _state.value = _state.value.copy(saving = false, error = ErrorMapper.mapError(err) ?: "Newsletter konnte nicht gespeichert werden.")
+                }
+        }
+    }
+
+    fun updateNewsletter(id: String, patch: Map<String, Any?>) {
+        viewModelScope.launch {
+            _state.value = _state.value.copy(saving = true, error = null, message = null)
+            repository.updateNewsletter(id, patch)
+                .onSuccess { res ->
+                    val newslettersRes = repository.newsletters()
+                    _state.value = _state.value.copy(saving = false, newsletters = newslettersRes.getOrNull()?.newsletters.orEmpty(), message = res.message ?: "Newsletter aktualisiert")
+                }
+                .onFailure { err -> _state.value = _state.value.copy(saving = false, error = ErrorMapper.mapError(err) ?: "Newsletter konnte nicht aktualisiert werden.") }
+        }
+    }
+
+    fun sendNewsletter(id: String) {
+        viewModelScope.launch {
+            _state.value = _state.value.copy(saving = true, error = null, message = null)
+            repository.sendNewsletter(id)
+                .onSuccess { res ->
+                    val newslettersRes = repository.newsletters()
+                    _state.value = _state.value.copy(saving = false, newsletters = newslettersRes.getOrNull()?.newsletters.orEmpty(), message = res.message ?: "Newsletter versendet")
+                }
+                .onFailure { err -> _state.value = _state.value.copy(saving = false, error = ErrorMapper.mapError(err) ?: "Newsletter konnte nicht versendet werden.") }
+        }
+    }
+
+    fun deleteNewsletter(id: String) {
+        viewModelScope.launch {
+            _state.value = _state.value.copy(saving = true, error = null, message = null)
+            repository.deleteNewsletter(id)
+                .onSuccess { res ->
+                    val newslettersRes = repository.newsletters()
+                    _state.value = _state.value.copy(saving = false, newsletters = newslettersRes.getOrNull()?.newsletters.orEmpty(), message = res.message ?: "Newsletter gelöscht")
+                }
+                .onFailure { err -> _state.value = _state.value.copy(saving = false, error = ErrorMapper.mapError(err) ?: "Newsletter konnte nicht gelöscht werden.") }
+        }
+    }
+
+    // --- Newsletter Groups (B4)
+    fun createNewsletterGroup(payload: Map<String, Any?>) {
+        viewModelScope.launch {
+            _state.value = _state.value.copy(saving = true, error = null, message = null)
+            repository.createNewsletterGroup(payload)
+                .onSuccess { res ->
+                    val groupsRes = repository.newsletterGroups()
+                    _state.value = _state.value.copy(saving = false, newsletterGroups = groupsRes.getOrNull()?.groups.orEmpty(), message = res.message ?: "Gruppe erstellt")
+                }
+                .onFailure { err -> _state.value = _state.value.copy(saving = false, error = ErrorMapper.mapError(err) ?: "Gruppe konnte nicht erstellt werden.") }
+        }
+    }
+
+    fun updateNewsletterGroup(id: String, patch: Map<String, Any?>) {
+        viewModelScope.launch {
+            _state.value = _state.value.copy(saving = true, error = null, message = null)
+            repository.updateNewsletterGroup(id, patch)
+                .onSuccess { res ->
+                    val groupsRes = repository.newsletterGroups()
+                    _state.value = _state.value.copy(saving = false, newsletterGroups = groupsRes.getOrNull()?.groups.orEmpty(), message = res.message ?: "Gruppe aktualisiert")
+                }
+                .onFailure { err -> _state.value = _state.value.copy(saving = false, error = ErrorMapper.mapError(err) ?: "Gruppe konnte nicht aktualisiert werden.") }
+        }
+    }
+
+    fun deleteNewsletterGroup(id: String) {
+        viewModelScope.launch {
+            _state.value = _state.value.copy(saving = true, error = null, message = null)
+            repository.deleteNewsletterGroup(id)
+                .onSuccess { res ->
+                    val groupsRes = repository.newsletterGroups()
+                    _state.value = _state.value.copy(saving = false, newsletterGroups = groupsRes.getOrNull()?.groups.orEmpty(), message = res.message ?: "Gruppe gelöscht")
+                }
+                .onFailure { err -> _state.value = _state.value.copy(saving = false, error = ErrorMapper.mapError(err) ?: "Gruppe konnte nicht gelöscht werden.") }
+        }
+    }
+
     // --- User management actions (B2)
     fun updateUserRoles(id: String, roles: List<String>) {
         viewModelScope.launch {
diff --git a/android-app/app/src/main/java/de/harheimertc/ui/screens/memberarea/MemberAreaDetailScreens.kt b/android-app/app/src/main/java/de/harheimertc/ui/screens/memberarea/MemberAreaDetailScreens.kt
index 1351dd4..ac7f769 100644
--- a/android-app/app/src/main/java/de/harheimertc/ui/screens/memberarea/MemberAreaDetailScreens.kt
+++ b/android-app/app/src/main/java/de/harheimertc/ui/screens/memberarea/MemberAreaDetailScreens.kt
@@ -11,6 +11,8 @@ import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.Button
+import androidx.compose.material3.ButtonDefaults
+import androidx.compose.material3.Checkbox
 import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.OutlinedTextField
@@ -25,6 +27,7 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
+import android.util.Log
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
 import androidx.hilt.navigation.compose.hiltViewModel
@@ -111,6 +114,11 @@ fun MembersScreen(
         else -> filtered.sortedWith(compareBy<MemberDto> { it.lastName.ifBlank { it.name } }.thenBy { it.firstName })
     }.let { if (sortAsc) it else it.asReversed() }
 
+    var viewMode by remember { mutableStateOf("cards") }
+    var onlyHallKey by remember { mutableStateOf(false) }
+    val display = remember(members, onlyHallKey) { if (!onlyHallKey) members else members.filter { it.hasHallKey } }
+    Log.i("MembersScreen", "viewMode=$viewMode displayCount=${display.size}")
+
     MemberAreaPage(navController, showBackNavigation, "Mitgliederliste", "Kontaktdaten der Vereinsmitglieder") {
         item {
             OutlinedTextField(
@@ -134,11 +142,39 @@ fun MembersScreen(
                 TextButton(onClick = { sortAsc = !sortAsc }) { Text(if (sortAsc) "A→Z" else "Z→A") }
             }
         }
+        item {
+            Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                Button(onClick = { viewMode = if (viewMode == "cards") "table" else "cards" }, colors = ButtonDefaults.buttonColors(containerColor = Color(0xFFF3F4F6))) {
+                    Text(if (viewMode == "cards") "Tabelle" else "Karten", color = Accent900)
+                }
+                androidx.compose.material3.Checkbox(checked = onlyHallKey, onCheckedChange = { onlyHallKey = it })
+                Text("Nur mit Hallenschlüssel", color = Accent700)
+            }
+        }
+        item {
+            if (viewMode == "table") {
+                Text("DEBUG: TABLE", color = Color.Red, modifier = Modifier.fillMaxWidth().padding(8.dp))
+            }
+        }
+
         when {
             state.loading -> item { CircularProgressIndicator(color = Primary600) }
             state.error != null -> item { ErrorCard(state.error.orEmpty(), viewModel::load) }
-            members.isEmpty() -> item { Text("Keine Mitglieder gefunden.", color = Accent700) }
-            else -> items(members.size) { index -> MemberCard(members[index]) }
+            display.isEmpty() -> item { Text("Keine Mitglieder gefunden.", color = Accent700) }
+            else -> if (viewMode == "table") {
+                items(display.size) { index ->
+                    val m = display[index]
+                    Surface(color = Color.White, shape = RoundedCornerShape(6.dp)) {
+                        Row(Modifier.fillMaxWidth().padding(12.dp), horizontalArrangement = Arrangement.spacedBy(12.dp)) {
+                            Column(Modifier.weight(1f)) { Text(m.name, color = Accent900) }
+                            Column(Modifier.weight(1f)) { Text(m.email ?: "-", color = Primary600) }
+                            Column(Modifier.weight(1f)) { Text(m.phone ?: "-", color = Accent700) }
+                        }
+                    }
+                }
+            } else {
+                items(display.size) { index -> MemberCard(display[index]) }
+            }
         }
     }
 }
@@ -220,7 +256,7 @@ private fun MemberAreaPage(
 }
 
 @Composable
-private fun MemberCard(member: MemberDto) {
+private fun MemberCard(member: MemberDto, onEdit: (MemberDto) -> Unit = {}, onDelete: (MemberDto) -> Unit = {}) {
     Surface(color = Color.White, shape = RoundedCornerShape(14.dp), shadowElevation = 3.dp) {
         Column(Modifier.fillMaxWidth().padding(18.dp), verticalArrangement = Arrangement.spacedBy(7.dp)) {
             Text(member.name.ifBlank { "${member.firstName} ${member.lastName}".trim() }, style = MaterialTheme.typography.titleLarge, color = Accent900)
@@ -238,6 +274,12 @@ private fun MemberCard(member: MemberDto) {
             if (member.email.isNullOrBlank() && member.phone.isNullOrBlank()) {
                 Text("Kontaktdaten sind für dich nicht freigegeben.", color = Accent500)
             }
+            Row {
+                if (member.editable) {
+                    TextButton(onClick = { onEdit(member) }) { Text("Bearbeiten") }
+                    TextButton(onClick = { onDelete(member) }) { Text("Löschen") }
+                }
+            }
         }
     }
 }
diff --git a/android-app/app/src/main/java/de/harheimertc/ui/screens/memberarea/MemberAreaDetailViewModels.kt b/android-app/app/src/main/java/de/harheimertc/ui/screens/memberarea/MemberAreaDetailViewModels.kt
index 1a24309..7d3bd2d 100644
--- a/android-app/app/src/main/java/de/harheimertc/ui/screens/memberarea/MemberAreaDetailViewModels.kt
+++ b/android-app/app/src/main/java/de/harheimertc/ui/screens/memberarea/MemberAreaDetailViewModels.kt
@@ -41,6 +41,38 @@ class MembersViewModel @Inject constructor(
                 .onFailure { _state.value = _state.value.copy(loading = false, error = it.message ?: "Mitglieder konnten nicht geladen werden.") }
         }
     }
+
+    fun saveMember(request: de.harheimertc.data.ApiService.MemberSaveRequest) {
+        viewModelScope.launch {
+            repository.saveMember(request)
+                .onSuccess { _ -> load() }
+                .onFailure { /* expose errors if needed */ }
+        }
+    }
+
+    fun deleteMember(id: String) {
+        viewModelScope.launch {
+            repository.deleteMember(id)
+                .onSuccess { _ -> load() }
+                .onFailure { /* handle error */ }
+        }
+    }
+
+    fun bulkImport(members: List<Map<String, String>>) {
+        viewModelScope.launch {
+            repository.bulkImport(members)
+                .onSuccess { _ -> load() }
+                .onFailure { /* handle error */ }
+        }
+    }
+
+    fun toggleMannschaftsspieler(memberId: String) {
+        viewModelScope.launch {
+            repository.toggleMannschaftsspieler(memberId)
+                .onSuccess { _ -> load() }
+                .onFailure { /* handle error */ }
+        }
+    }
 }
 
 data class MemberNewsUiState(
diff --git a/android-app/member_screen.png b/android-app/member_screen.png
new file mode 100644
index 0000000..f41c5cd
Binary files /dev/null and b/android-app/member_screen.png differ