fix oauth

readme.md

@@ -312,6 +312,35 @@ cargo build
 }
 ```
 
+## Assets
+
+### PNG to SVG Conversion (Vector Trace)
+
+Convert PNG images to true vector SVG using vtracer (Rust):
+
+```bash
+# Install vtracer
+cargo install vtracer
+
+# Convert PNG to SVG (color mode)
+vtracer --input input.png --output output.svg --colormode color
+
+# Convert PNG to SVG (black and white)
+vtracer --input input.png --output output.svg
+```
+
+**Options:**
+- `--colormode color` : Preserve colors (recommended for icons)
+- `--colormode binary` : Black and white only
+- `--filter_speckle 4` : Remove small artifacts
+- `--corner_threshold 60` : Adjust corner detection
+
+**Alternative tools:**
+- potrace: `potrace input.pbm -s -o output.svg` (B&W only, requires PBM input)
+- Inkscape CLI: `inkscape input.png --export-type=svg` (embeds image, no trace)
+
+**Note:** Inkscape's CLI `--export-type=svg` only embeds the PNG, it does not trace. For true vectorization, use vtracer or potrace.
+
 ## License
 
 MIT