- Keys typed on the Library (no dialog open, search not focused) go into the search and focus it, cursor at the end; Backspace removes the last character; Esc in a non-empty search clears it
- Pure helpers library.typed_char / should_capture (tested); C.dialog_open reads Flet's page._dialogs (snack bars don't count)
- Search hint "Type to search games and tags"
- "Add a PC VR game folder…" is now "Add a PC game folder…" (it adds Windows games too)
- ui_smoke: library-typed step types "arc" after clicking the header
