Release grok-build-hud v0.3.9: multi-terminal HUD, i18n settings, theme follow

Standalone Grok Build status strip with parallel sessions, width-adaptive
layout, Chinese/English settings UI, and token breakdown. Product copy no
longer references third-party tools.

bin/grok-hud.js

@@ -31,6 +31,10 @@ else if (head === "status" || head === undefined) {
   mapped = ["--dashboard-start"];
 } else if (head === "install") {
   mapped = ["--install-dashboard"];
+} else if (head === "settings" || head === "config" || head === "设定" || head === "設置") {
+  mapped = ["--settings", ...argv.slice(1)];
+} else if (head === "lang" || head === "language" || head === "语言" || head === "語言") {
+  mapped = ["--lang", argv[1] || "zh", ...argv.slice(2)];
 }
 
 const code = await mod.runCli(mapped);