Initial DDC release

web/static/js/theme.js

@@ -0,0 +1,10 @@
+(function () {
+  try {
+    var theme = localStorage.getItem("ddc-theme");
+    if (theme === "light" || theme === "dark") {
+      document.documentElement.setAttribute("data-theme", theme);
+    }
+  } catch (error) {
+    return;
+  }
+})();