docs(design): remove SVG, use PNG logo only

SVG icon is no longer in use. public/logo.png (1024x1024 RGBA) is
the single logo asset. DESIGN.md updated accordingly: SVG snippet
removed, wordmark pattern and <head> references updated to PNG.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

node_modules/postcss-selector-parser/dist/sortAscending.js

@@ -0,0 +1,11 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = sortAscending;
+function sortAscending(list) {
+  return list.sort(function (a, b) {
+    return a - b;
+  });
+}
+;
+module.exports = exports.default;