Summary

• install a global panic hook that preserves the default stderr output and writes rotating crash reports with backtraces and session-log tails
• add a lightweight rotating session file logger with stderr fallback and debug mirroring
• surface unacknowledged crash reports through the recovery dialog or status bar on the next launch
• keep release symbols in separate packed debug artifacts while leaving distributed binaries stripped
• document crash reports and session logs in the English and Simplified Chinese manuals

Validation

• cargo release-build
• cargo pr-check
• npm run build in docs/
• main-thread panic smoke test
• named background-thread panic smoke test
• confirmed target/release/plotx.pdb is generated separately