Remove a pointless `void options.callbackTimeout;` no-op in napcat-rpc client. In the service worker template, add `/* eslint-disable no-undef */` and an explicit `return undefined;` in the cache cleanup callback to make the return value explicit and satisfy linters. In the OneBot debug UI, call `sendRequest(value)` without the leading `void` so the returned promise is not intentionally ignored.
手瓜一十雪
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