fix(convert): 修复no-color模式渲染问题

- 修复了在no-color模式下会当分辨率无法被整除时的渲染错误

Author: yyxxryrx

src/image/converter.rs

@@ -219,6 +219,13 @@ impl ImageConverter {
             let pixel = rgba_img.get_pixel(x, y);
             let color = PixelColor::from_channels(pixel.0);
             format!("{}▀", color.fg())
+        } else if let ProcessedImage::NoColor(luma_img) = &self.img{
+            let pixel = luma_img.get_pixel(x, y);
+            if pixel.0[0] > 128 {
+                "▀".to_string()
+            } else {
+                " ".to_string()
+            }
         } else {
             panic!("Invalid image type")
         }