Add a Filter multiselect next to the sort pills in the file tree toolbar.
The option list is large and undecided, so FS_FILTER_OPTIONS is empty and
the per-node match is a no-op for now; the mechanism is wired end to end:
- FS_FILTER_OPTIONS const (empty), pysimFsFilter state persisted to
simple_fs_filter, pysimFsSetFilter / pysimFsFilterMatch /
pysimFsFilterRender, and the render loop consults pysimFsFilterMatch.
- The dropdown re-renders on language switch; "Filter:" and
"(no filters yet)" are translated (EN/RU).
Frontend 1132 tests green (6 new scaffold pins).
catarrh
3878156646
