Codex fixes

public/theme-init.js

@@ -0,0 +1,13 @@
+(function () {
+  try {
+    var storedTheme = window.localStorage.getItem("theme-preference");
+    var theme =
+      storedTheme === "light" || storedTheme === "dark"
+        ? storedTheme
+        : window.matchMedia("(prefers-color-scheme: dark)").matches
+          ? "dark"
+          : "light";
+    document.documentElement.dataset.theme = theme;
+  } catch {
+  }
+})();