Fix review comment

Author: award999

src/commands.ts

@@ -150,7 +150,7 @@ export function register(ctx: WorkspaceContext): vscode.Disposable[] {
         ),
         vscode.commands.registerCommand(Commands.PLAY, async target => {
             const folder = ctx.currentFolder;
-            if (!folder) {
+            if (!folder || !target) {
                 return false;
             }
             return await runPlayground(folder, ctx.tasks, target);

src/commands/runPlayground.ts

@@ -38,11 +38,8 @@ export interface WorkspacePlaygroundItem extends PlaygroundItem {
 export async function runPlayground(
     folderContext: FolderContext,
     tasks: TaskManager,
-    item?: PlaygroundItem
+    item: PlaygroundItem
 ) {
-    if (!item) {
-        return false;
-    }
     const id = item.label ?? item.id;
     const task = createSwiftTask(
         ["play", id],