fix: preserve Listr build task nesting

command/up.ts

@@ -738,7 +738,7 @@ export async function runUp(
   };
   const workspacePath = `/workspaces/${encodeURIComponent(project)}`;
 
-  const taskCtx = await new Listr<UpContext, "default" | "simple">(
+  const taskCtx = await new Listr<UpContext>(
     [
       {
         title: "Read compose",
@@ -840,12 +840,16 @@ export async function runUp(
             );
             return operation;
           };
-          await task
-            .newListr<UpContext>(
-              services.map((name) => ({
+          return task.newListr<UpContext>(
+            [
+              ...services.map((name) => ({
                 title: `Build ${name}`,
                 rendererOptions: { outputBar: 10, persistentOutput: true },
-                task: async (_ctx, child) => {
+                exitOnError: false,
+                task: async (
+                  _ctx: UpContext,
+                  child: ListrTaskWrapper<UpContext, any, any>,
+                ) => {
                   children.set(name, child);
                   child.output = "Build queued";
                   if (children.size === services.length) start();
@@ -854,14 +858,20 @@ export async function runUp(
                   child.output = "done";
                 },
               })),
-              { concurrent: true, exitOnError: false },
-            )
-            .run();
-          await operation;
-          if (!result) throw operationFailure ?? new Error("Build images failed");
-          taskCtx.buildImages = result.images;
-          await config.postBuild?.(result, await getHookContext());
-          task.title = `Built ${result.built.length} image${result.built.length === 1 ? "" : "s"}`;
+              {
+                task: async () => {
+                  await Promise.all(completed.values());
+                  await operation;
+                  if (!result)
+                    throw operationFailure ?? new Error("Build images failed");
+                  taskCtx.buildImages = result.images;
+                  await config.postBuild?.(result, await getHookContext());
+                  task.title = `Built ${result.built.length} image${result.built.length === 1 ? "" : "s"}`;
+                },
+              },
+            ],
+            { concurrent: true },
+          );
         },
       },
       {
@@ -1072,11 +1082,10 @@ export async function runUp(
       },
     ],
     {
-      // Build progress can remain queued across many polls. The default TTY
-      // spinner redraws every child on every tick, which duplicates those
-      // frames in captured terminal output. Simple emits only task events.
-      renderer: build ? "simple" : "default",
-      rendererOptions: { collapseErrors: false },
+      renderer: "default",
+      // Only redraw when a task changes; a queued build should not generate
+      // another frame on each spinner tick. Keep the renderer's task tree.
+      rendererOptions: { collapseErrors: false, collapseSubtasks: false, lazy: true },
     },
   ).run();