- pysimFsSortChildren() groups DFs above EFs, then sorts each group by
FID (default) or case-insensitive symbolic name; missing names fall
back to the FID as the sort key; deterministic tie-break; the input
array is not mutated
- render uses the sorted copy, so lazily loaded directories and custom
file injections are sorted too
- FID / Name pills above the tree (pysimFsSetSort) persist the choice in
localStorage (otaman_fs_sort) and re-render without refetching
- tests for the comparator (DF priority, both keys, fallbacks, custom
entries, no mutation) and the pill wiring; help/README updated;
SW cache v108 -> v109.
