* Prepare native chat CLI copies from the host record
* Apply staged-file lint and formatting checks
* Cover pairing replacement before queued preparation dispatch
* Reuse CLI failure feedback and complete the pairing test response
* Isolate Codex materialization test user data
* Preserve native chat CLI copy completion and preparation ownership
* test: consolidate native conversation fork contracts
* fix(native-chat): refuse a Codex chat fork whose saved account home has no CODEX_HOME path