Newer opencode (1.15+) syncs its hosted free-model catalog over the
network on `opencode models`, which can take ~6s. The previous 5s cap
killed the command, discoverOpenCodeModels returned an empty list, and
the daemon reported it as a successful empty result — so the runtime
showed online but the model picker was empty ("暂无可用模型").
Fixes#3627
Co-authored-by: J <j@multica.ai>
Co-authored-by: multica-agent <github@multica.ai>