fix(worker): always release stopped workspaces

apps/agent-worker/src/worker.ts

@@ -139,6 +139,13 @@ const sleep = (ms: number) => new Promise((resolve) => setTimeout(resolve, ms));
 const client = new ConvexHttpClient(env.convexUrl);
 const activeWorkspaces = new Map<string, ActiveWorkspace>();
 
+export const _setActiveWorkspaceForTests = (
+  jobId: string,
+  workspace: ActiveWorkspace,
+) => activeWorkspaces.set(jobId, workspace);
+
+export const _resetActiveWorkspacesForTests = () => activeWorkspaces.clear();
+
 const appendEvent = async (
   jobId: Id<'agentJobs'>,
   level: 'debug' | 'info' | 'warn' | 'error',
@@ -1894,15 +1901,35 @@ export const openWorkspacePullRequest = async (jobId: string) => {
 
 export const stopWorkspace = async (jobId: string) => {
   const workspace = resolveWorkspace(jobId);
-  await markWorkspaceStopped(workspace.claim.job._id);
-  workspace.opencodeSession?.close();
-  if (workspace.containerName) {
-    await stopWorkspaceContainer(workspace.containerName);
+  const errors: unknown[] = [];
+  try {
+    await markWorkspaceStopped(workspace.claim.job._id);
+  } catch (error) {
+    errors.push(error);
+  }
+  try {
+    workspace.opencodeSession?.close();
+  } catch (error) {
+    errors.push(error);
+  }
+  try {
+    if (workspace.containerName) {
+      await stopWorkspaceContainer(workspace.containerName);
+    }
+  } catch (error) {
+    errors.push(error);
+  } finally {
+    activeWorkspaces.delete(jobId);
+    try {
+      workspace.boxHandle.release();
+    } catch (error) {
+      errors.push(error);
+    }
+  }
+  if (errors.length === 1) throw errors[0];
+  if (errors.length > 1) {
+    throw new AggregateError(errors, 'Workspace teardown failed.');
   }
-  activeWorkspaces.delete(jobId);
-  // The persistent per-user home + ~/Code checkouts survive across sessions;
-  // release the box (reaped once no other thread/terminal holds it).
-  workspace.boxHandle.release();
   return { success: true };
 };