- Toolbar: single expand/collapse toggle; change count after Save/Exit.
- Save modal: selective revert per change; modern list styling, empty state;
Session + OnReverted; Save disabled when no changes.
- Cancel: prevent blur-before-click (mousedown preventDefault on cancel
badge); _cancelRequested so cancel never commits.
- DeactivateFieldAsync in UiContext + Section; OptionStateBadge cancel
clears draft and deactivates.
Replace separate Expand all / Collapse all buttons with one toggle button.
Icon and label switch based on AllSectionsExpanded (expand when any
section collapsed, collapse when all expanded).
alex