[nmrtist]

Summary

Record sample conditions and experiment metadata alongside protein assignments so 3D spectra carry explicit scientific context.

• Persist reusable sample conditions and experiment types with acquisition-axis roles, validation and Undo/Redo.
• Add a panel editor with optional JSON editing, stale-draft protection and recovery when the target spectrum is deleted.
• Check initial structure scope and NOESY proton roles against recorded context and acquired nuclei.
• Add persistence, validation and interaction regressions, and update the English and Simplified Chinese guides.

Validation

• cargo pr-check — passed, including persistence, Undo/Redo, scope boundaries, draft conflicts and widget interaction tests. Reran with the Windows permissions required by ACL and discovery-lock tests.
• npm run build in docs/ — passed, generating 123 pages.
• git diff --cached --check — passed.

UI display logic

• New controls are panel-local widget interactions, exempt from command catalog registration.
• Transient conflicts disable saving with guidance on how to recover; no Ribbon visibility changes.
• No layout changes from background events; panels are never auto-closed.
• Empty editing states provide a next step to select or create sample conditions.
• Docs updated in docs/ (English and zh-CN) for user-visible behavior.