fix: remove inline script

Author: semanticdata

src/js/theme-init.js

@@ -0,0 +1,13 @@
+(function () {
+    const localStorageTheme = localStorage.getItem("theme");
+    const systemSettingDark = window.matchMedia("(prefers-color-scheme: dark)").matches;
+
+    let theme = "light";
+    if (localStorageTheme) {
+        theme = localStorageTheme;
+    } else if (systemSettingDark) {
+        theme = "dark";
+    }
+
+    document.documentElement.setAttribute("data-theme", theme);
+})();

src/newtab.html

@@ -9,21 +9,7 @@
     content="NoteKeeper is a Firefox extension that transforms the New Tab into a minimalist, auto-saving text editor.">
   <link rel="icon" type="image/png" sizes="48x48" href="icons/icon48.png" />
   <!-- Prevent flash of incorrect theme -->
-  <script>
-    (function () {
-      const localStorageTheme = localStorage.getItem("theme");
-      const systemSettingDark = window.matchMedia("(prefers-color-scheme: dark)").matches;
-
-      let theme = "light";
-      if (localStorageTheme) {
-        theme = localStorageTheme;
-      } else if (systemSettingDark) {
-        theme = "dark";
-      }
-
-      document.documentElement.setAttribute("data-theme", theme);
-    })();
-  </script>
+  <script type="text/javascript" src="js/theme-init.js"></script>
   <link rel="stylesheet" href="styles.css" />
 </head>