Typing "F" only found file names with a word starting with F (FTS5
prefix match), so the grid did not list e.g. sunflower.png or
ComfyUI_00001_.png. Single-word queries now add a filename LIKE
'%text%' branch to the global and scoped FTS queries and their counts,
ranked after FTS hits, with LIKE wildcards escaped. Multi-word and
quoted queries stay pure FTS.
