fix(app): handle nullable detail consumers

apps/next/src/app/api/threads/[threadId]/message/route.ts

@@ -1,3 +1,4 @@
+import type { FunctionReturnType } from 'convex/server';
 import { NextResponse } from 'next/server';
 import { proxyWorker } from '@/lib/agent-worker-proxy';
 import { convexAuthNextjsToken } from '@convex-dev/auth/nextjs/server';
@@ -35,7 +36,14 @@ export const POST = async (
         { status: 400 },
       );
     }
-    const details = await fetchQuery(api.threads.get, { threadId }, { token });
+    const details = (await fetchQuery(
+      api.threads.get,
+      { threadId },
+      { token },
+    )) as FunctionReturnType<typeof api.threads.get> | null;
+    if (details === null) {
+      return NextResponse.json({ error: 'Thread not found.' }, { status: 404 });
+    }
     const latestJob = details.latestJob;
     const canSendToWorker =
       latestJob &&

apps/next/src/components/agent-workspace/agent-workspace-shell.tsx

@@ -1,5 +1,6 @@
 'use client';
 
+import type { FunctionReturnType } from 'convex/server';
 import type { CSSProperties, PointerEvent as ReactPointerEvent } from 'react';
 import { useCallback, useEffect, useState } from 'react';
 import { useMutation, useQuery } from 'convex/react';
@@ -59,7 +60,10 @@ type PendingOverwrite = {
 };
 
 export const AgentWorkspaceShell = ({ jobId }: { jobId: Id<'agentJobs'> }) => {
-  const job = useQuery(api.agentJobs.get, { jobId });
+  const job = useQuery(api.agentJobs.get, { jobId }) as
+    | FunctionReturnType<typeof api.agentJobs.get>
+    | null
+    | undefined;
   const messages =
     useQuery(api.agentJobs.listMessages, { jobId, limit: 200 }) ?? [];
   const events =
@@ -323,6 +327,14 @@ export const AgentWorkspaceShell = ({ jobId }: { jobId: Id<'agentJobs'> }) => {
     );
   }
 
+  if (job === null) {
+    return (
+      <main className='text-muted-foreground p-6'>
+        This workspace was not found.
+      </main>
+    );
+  }
+
   const activeFile = activeFilePath ? files[activeFilePath] : undefined;
   const recoverWorkspace = async () => {
     if (!job.threadId) return;