feat(openrouter):add claw-x header (#213)

Co-authored-by: Cursor Agent <cursoragent@cursor.com>
Co-authored-by: Haze <hazeone@users.noreply.github.com>

electron/utils/openrouter-headers-preload.cjs

@@ -0,0 +1,45 @@
+/**
+ * Gateway fetch preload — loaded via NODE_OPTIONS --require before
+ * the OpenClaw Gateway starts.
+ *
+ * Patches globalThis.fetch so that every request whose URL contains
+ * "openrouter.ai" carries the ClawX app-attribution headers.
+ *
+ * The OpenAI SDK (used by OpenClaw) captures globalThis.fetch in its
+ * constructor, so patching here guarantees all SDK requests go through
+ * the interceptor.
+ */
+'use strict';
+
+(function () {
+  var _f = globalThis.fetch;
+  if (typeof _f !== 'function') return;
+  if (globalThis.__clawxFetchPatched) return;
+  globalThis.__clawxFetchPatched = true;
+
+  globalThis.fetch = function clawxFetch(input, init) {
+    var url =
+      typeof input === 'string' ? input
+        : input && typeof input === 'object' && typeof input.url === 'string'
+          ? input.url : '';
+
+    if (url.indexOf('openrouter.ai') !== -1) {
+      init = init ? Object.assign({}, init) : {};
+      var prev = init.headers;
+      var flat = {};
+      if (prev && typeof prev.forEach === 'function') {
+        prev.forEach(function (v, k) { flat[k] = v; });
+      } else if (prev && typeof prev === 'object') {
+        Object.assign(flat, prev);
+      }
+      delete flat['http-referer'];
+      delete flat['HTTP-Referer'];
+      delete flat['x-title'];
+      delete flat['X-Title'];
+      flat['HTTP-Referer'] = 'https://claw-x.com';
+      flat['X-Title'] = 'ClawX';
+      init.headers = flat;
+    }
+    return _f.call(globalThis, input, init);
+  };
+})();