- Make the logs textarea required so a bug report can't be submitted empty.
- Document how to enable TRACE: WebUI server log-level switch (+ '开发'
preset so the export actually contains trace lines) or SNOWLUMA_LOG_LEVEL=trace.
- Add a required preflight checkbox attesting TRACE logs are attached.
Adds structured YAML issue forms (bug + feature) and a config that
disables blank issues and links to the QQ group / Telegram channels
already in README.