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/resolve/lib/homedir.js

@@ -0,0 +1,31 @@
+'use strict';
+
+var os = require('os');
+
+// adapted from https://github.com/sindresorhus/os-homedir/blob/11e089f4754db38bb535e5a8416320c4446e8cfd/index.js
+
+module.exports = os.homedir || function homedir() {
+    var home = process.env.HOME;
+    var user = process.env.LOGNAME || process.env.USER || process.env.LNAME || process.env.USERNAME;
+
+    if (process.platform === 'win32') {
+        return process.env.USERPROFILE
+            || (
+                process.env.HOMEDRIVE
+                && process.env.HOMEPATH
+                && (process.env.HOMEDRIVE + process.env.HOMEPATH)
+            )
+            || home
+            || null;
+    }
+
+    if (process.platform === 'darwin') {
+        return home || (user ? '/Users/' + user : null);
+    }
+
+    if (process.platform === 'linux') {
+        return home || (process.getuid() === 0 ? '/root' : (user ? '/home/' + user : null)); // eslint-disable-line no-extra-parens
+    }
+
+    return home || null;
+};