Add image/font assets from Angular and fix CSS url() resolution

- Copy 134 image files and 28 font files from ClientApp/src/assets/
  to public/assets/ for browser-side serving
- Set tools.cssLoader.url=false in modern.config.ts so the CSS loader
  leaves url() references as-is instead of trying to resolve them as
  webpack modules
- Add .playwright-mcp/, coverage/, and screenshot artifacts to .gitignore

.gitignore

@@ -35,3 +35,14 @@ wwwroot/dist/
 @mf-types.zip
 @mf-types/
 .mf/
+
+# Playwright MCP artifacts
+.playwright-mcp/
+*.png
+smoke-page*.png
+angular-start.png
+react-*.png
+onlineboard-*.png
+
+# Coverage output
+coverage/