v2.6.1

Fixed

• SVG clipboard round-trip on Windows and macOS: copying an SVG via
  clipboard_copy(mime_type="image/svg+xml") and then pasting it back
  no longer returns "Clipboard is empty." Three layered gaps closed:
  (1) _windows_read gained an image/svg+xml branch that calls
  Clipboard::GetData('image/svg+xml') (mirroring the custom format
  string the writer registers) and forces UTF-8 stdout encoding so
  the round-tripped XML doesn't get mangled by PowerShell's default
  OEM OutputEncoding. (2) _macos_read gained an image/svg+xml
  branch that reads public.svg-image UTI bytes as UTF-8, and
  _UTI_TO_MIME learned public.svg-image -> image/svg+xml so
  list_clipboard_formats surfaces SVG with its MIME type rather
  than the raw UTI. (3) clipboard_paste's auto-dispatch no longer
  routes image/svg+xml through the binary read_clipboard_image
  path (which raster readers reject as "Unsupported image type");
  SVG-only clipboards are now read as text and returned in an

  over SVG when both are present, so a typical "screenshot + SVG
  source" clipboard still returns the viewable PNG as before. The
  Linux backends (Wayland/X11) were already correct via passthrough
  on `wl-paste --type` / `xclip -target`.