add button to delete board

src/ViewModel/Pages/boardViewModel.ts

@@ -58,6 +58,11 @@ export default class BoardViewModel {
     this.taskPageViewModel.chatViewModel.setDisplayedColor(this.color.value);
   };
 
+  deleteBoard = (): void => {
+    this.taskPageViewModel.deleteBoard(this.boardInfo);
+    this.close();
+  };
+
   // load
   loadListRelevantData = (): void => {
     this.name.value = this.boardInfo.name;

src/ViewModel/Pages/taskPageViewModel.ts

@@ -65,6 +65,12 @@ export default class TaskPageViewModel {
     this.updateIndices();
   };
 
+  deleteBoard = (boardInfoFileContent: BoardInfoFileContent): void => {
+    this.taskModel.deleteBoard(boardInfoFileContent.fileId);
+    this.boardViewModels.remove(boardInfoFileContent.fileId);
+    this.updateIndices();
+  };
+
   // view
   showBoardInList = (boardInfo: BoardInfoFileContent): void => {
     const boardViewModel: BoardViewModel = new BoardViewModel(this, boardInfo);