chore: consolidate redundant controllers in mail-service, improve backend stability, refine desktop UX, and enhance Vereinsverwaltung functionality

frontend/features/device-initialization/src/jvmMain/kotlin/at/mocode/frontend/features/device/initialization/presentation/DeviceInitializationConfig.jvm.kt

@@ -63,14 +63,7 @@ actual fun DeviceInitializationConfig(
         errorText = "Mindestens ${DeviceInitializationValidator.MIN_NAME_LENGTH} Zeichen erforderlich.",
         keyboardOptions = KeyboardOptions(imeAction = ImeAction.Next),
         keyboardActions = KeyboardActions(onNext = { focusManager.moveFocus(FocusDirection.Next) }),
-        modifier = Modifier.focusRequester(deviceNameFocus).onKeyEvent {
-          if (it.key == Key.Enter && it.type == KeyEventType.KeyUp) {
-            focusManager.moveFocus(FocusDirection.Next)
-            true
-          } else {
-            false
-          }
-        }
+        modifier = Modifier.focusRequester(deviceNameFocus)
       )
 
       var passwordVisible by remember { mutableStateOf(false) }
@@ -95,18 +88,7 @@ actual fun DeviceInitializationConfig(
             }
           }
         ),
-        modifier = Modifier.focusRequester(sharedKeyFocus).onKeyEvent {
-          if (it.key == Key.Enter && it.type == KeyEventType.KeyUp) {
-            if (settings.networkRole == NetworkRole.MASTER) {
-              focusManager.moveFocus(FocusDirection.Next)
-            } else if (DeviceInitializationValidator.canContinue(settings)) {
-              viewModel.completeInitialization()
-            }
-            true
-          } else {
-            false
-          }
-        },
+        modifier = Modifier.focusRequester(sharedKeyFocus),
         trailingIcon = {
           IconButton(onClick = { passwordVisible = !passwordVisible }) {
             Icon(
@@ -123,17 +105,8 @@ actual fun DeviceInitializationConfig(
           onValueChange = { viewModel.updateSettings { s -> s.copy(backupPath = it) } },
           label = { Text("Backup-Verzeichnis (Pfad)") },
           placeholder = { Text("/pfad/zu/den/backups") },
-        modifier = Modifier.fillMaxWidth().focusRequester(backupPathFocus).onKeyEvent {
-          if (it.key == Key.Enter && it.type == KeyEventType.KeyUp) {
-            selectBackupPath(settings.backupPath) { selectedPath ->
-              viewModel.updateSettings { s -> s.copy(backupPath = selectedPath) }
-            }
-            true
-          } else {
-            false
-          }
-        },
-        keyboardOptions = KeyboardOptions(imeAction = ImeAction.Next),
+          modifier = Modifier.fillMaxWidth().focusRequester(backupPathFocus),
+          keyboardOptions = KeyboardOptions(imeAction = ImeAction.Next),
         keyboardActions = KeyboardActions(
           onNext = { focusManager.moveFocus(FocusDirection.Next) }
         ),