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/selectors/comment.js

@@ -0,0 +1,20 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = void 0;
+var _node = _interopRequireDefault(require("./node"));
+var _types = require("./types");
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { "default": e }; }
+function _inheritsLoose(t, o) { t.prototype = Object.create(o.prototype), t.prototype.constructor = t, _setPrototypeOf(t, o); }
+function _setPrototypeOf(t, e) { return _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function (t, e) { return t.__proto__ = e, t; }, _setPrototypeOf(t, e); }
+var Comment = exports["default"] = /*#__PURE__*/function (_Node) {
+  _inheritsLoose(Comment, _Node);
+  function Comment(opts) {
+    var _this;
+    _this = _Node.call(this, opts) || this;
+    _this.type = _types.COMMENT;
+    return _this;
+  }
+  return Comment;
+}(_node["default"]);
+module.exports = exports.default;