Fix selection tools and improve UI/UX

- Fix cut/copy to preserve mask shape with transparency
- Add missing CSS icons for magic_wand, lasso, ellipse_select tools
- Fix toast messages styling (visible on dark theme)
- Update AI Inpaint to work with all selection tools
- Change tab title to +miniPaint
- Add DNS config to docker-compose for external API access

docker-compose.yml

@@ -17,6 +17,10 @@ services:
       - STABILITY_API_KEY=${STABILITY_API_KEY:-}
       - REPLICATE_API_KEY=${REPLICATE_API_KEY:-}
       - CORS_ORIGINS=*
+    # DNS servers for reliable external API access (Replicate, etc.)
+    dns:
+      - 8.8.8.8
+      - 8.8.4.4
     restart: unless-stopped
 
 volumes: