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/@heroicons/react/16/solid/PercentBadgeIcon.js

@@ -0,0 +1,24 @@
+const React = require("react");
+function PercentBadgeIcon({
+  title,
+  titleId,
+  ...props
+}, svgRef) {
+  return /*#__PURE__*/React.createElement("svg", Object.assign({
+    xmlns: "http://www.w3.org/2000/svg",
+    viewBox: "0 0 16 16",
+    fill: "currentColor",
+    "aria-hidden": "true",
+    "data-slot": "icon",
+    ref: svgRef,
+    "aria-labelledby": titleId
+  }, props), title ? /*#__PURE__*/React.createElement("title", {
+    id: titleId
+  }, title) : null, /*#__PURE__*/React.createElement("path", {
+    fillRule: "evenodd",
+    d: "M3.396 6.093a2 2 0 0 0 0 3.814 2 2 0 0 0 2.697 2.697 2 2 0 0 0 3.814 0 2.001 2.001 0 0 0 2.698-2.697 2 2 0 0 0-.001-3.814 2.001 2.001 0 0 0-2.697-2.698 2 2 0 0 0-3.814.001 2 2 0 0 0-2.697 2.697ZM6 7a1 1 0 1 0 0-2 1 1 0 0 0 0 2Zm3.47-1.53a.75.75 0 1 1 1.06 1.06l-4 4a.75.75 0 1 1-1.06-1.06l4-4ZM11 10a1 1 0 1 1-2 0 1 1 0 0 1 2 0Z",
+    clipRule: "evenodd"
+  }));
+}
+const ForwardRef = /*#__PURE__*/ React.forwardRef(PercentBadgeIcon);
+module.exports = ForwardRef;