v0.4.12

[0.4.12] - 2026-05-15

• Fully took over top tab painting from WM_PAINT in the existing
  top_tabs_subclass_proc instead of trying to coax NM_CUSTOMDRAW into
  rendering on a SysTabControl32. v0.4.11 stripped visual styles, but
  comctl32 still never delivered useful CDDS_ITEMPREPAINT notifications,
  so the strip rendered with the default light theme and the close × was
  invisible. The new paint_top_tab_strip walks tabs via TCM_GETITEMCOUNT
  • TCM_GETITEMRECT, paints background / hover / selected per item using
    the cached tab theme, draws the filename, and renders the close × —
    giving us a real dark tab strip with a visible close glyph that brightens
    on hover.
• Removed the now-dead handle_top_tab_custom_draw and the matching
  NM_CUSTOMDRAW arm in WM_NOTIFY, plus the unused NMCUSTOMDRAW,
  CDRF_SKIPDEFAULT, GetDC, ReleaseDC imports.