android: apply delete action to full multi-selection

android/CHANGELOG.md

@@ -182,3 +182,7 @@
 - Extended `ChatViewModel` forward flow: multi-select now forwards multiple source messages in one action.
 - Wired `ForwardMessageBulkUseCase` for multi-message forwarding (sequential safe execution with error short-circuit).
 - Updated chat action bar and forward sheet labels for multi-selection count.
+
+### Step 29 - Core base / multi-select delete execution
+- Fixed multi-select delete behavior in `ChatViewModel`: `Delete` now applies to all selected messages, not only focused one.
+- Added explicit guard for `Delete for all` in multi-select mode (single-message only).

android/app/src/main/java/ru/daemonlord/messenger/ui/chat/ChatViewModel.kt

@@ -184,6 +184,35 @@ class ChatViewModel @Inject constructor(
     }
 
     fun onDeleteSelected(forAll: Boolean = false) {
+        val actionState = uiState.value.actionState
+        if (actionState.mode == MessageSelectionMode.MULTI) {
+            if (forAll) {
+                _uiState.update { it.copy(errorMessage = "Delete for all is available only for single message selection.") }
+                return
+            }
+            val selectedIds = actionState.selectedMessageIds.toList().sorted()
+            if (selectedIds.isEmpty()) return
+            viewModelScope.launch {
+                for (messageId in selectedIds) {
+                    when (val result = deleteMessageUseCase(messageId, forAll = false)) {
+                        is AppResult.Success -> Unit
+                        is AppResult.Error -> {
+                            _uiState.update { it.copy(errorMessage = result.reason.toUiMessage()) }
+                            return@launch
+                        }
+                    }
+                }
+                _uiState.update {
+                    it.copy(
+                        selectedMessage = null,
+                        selectedCanEdit = false,
+                        selectedCanDeleteForAll = false,
+                        actionState = it.actionState.clearSelection(),
+                    )
+                }
+            }
+            return
+        }
         val selected = getFocusedSelectedMessage() ?: return
         if (forAll && !canDeleteForAll(selected)) {
             _uiState.update { it.copy(errorMessage = "Delete for all is available only for your own messages.") }