fix: use fresh timestamp when setting cache entry

Use Date.now() after checkGitHubRemote() completes instead of the
pre-captured timestamp to ensure accurate 5-minute TTL.

apps/server/src/routes/worktree/routes/list.ts

@@ -161,7 +161,7 @@ async function getGitHubRemoteStatus(projectPath: string): Promise<GitHubRemoteS
   const status = await checkGitHubRemote(projectPath);
   githubRemoteCache.set(projectPath, {
     status,
-    checkedAt: now,
+    checkedAt: Date.now(),
   });
 
   return status;