Preserve the ID fallback and compact editor controls. Add dialog keyboard focus, Tab containment and Escape handling; document navigation and picker behavior.
Validation: 418 tests, API/web builds, scripts and Next typechecks, isolated AMEV dialog checks and diff checks passed. Full GUI retest waived by the user based on the colleague's prior testing; the keyboard follow-up was checked in isolation.
The selected GZF cell shows a small table-icon button, and Alt+ArrowDown opens
the same picker from the selected or edited cell; Escape closes it. The
shared GzfPickerModal is reused. The picked mean value is committed through
commitEdit with an explicit target cell, so it is a regular undoable edit on
device rows, compact circuits, reserve circuits and the -frei- row.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
