Constant FILE_PICKER_MAX_ENTRIES 

pub const FILE_PICKER_MAX_ENTRIES: usize = 5000; // 5_000usize

Hard cap on the file-picker walker’s emitted entry count. At this scale the host’s fuzzy matcher stays well inside the per-keystroke frame budget; larger trees fall back to ripgrep- style live filtering via :grep (P.10) or :Filetree’s per-directory lazy walk.