fix(ui): display 0 frame webp files in preview panel

Author: CyanVoxel

src/tagstudio/qt/widgets/preview/preview_thumb.py

@@ -255,7 +255,7 @@ def _update_animation(self, filepath: Path, ext: str) -> dict:
             self.preview_gif.setMovie(movie)
 
             # If the animation only has 1 frame, display it like a normal image.
-            if movie.frameCount() == 1:
+            if movie.frameCount() <= 1:
                 self._display_fallback_image(filepath, ext)
                 return stats