Revert "Rewrite cosmetics and theme preferences (#1292)"

This reverts commit 8704d3acb3.

apps/frontend/src/server/plugins/theme.js

@@ -0,0 +1,38 @@
+export default defineNitroPlugin((nitroApp) => {
+  nitroApp.hooks.hook("render:html", (html, { event }) => {
+    try {
+      const cookies = parseCookies(event);
+
+      if (cookies && cookies["color-mode"]) {
+        const theme = JSON.parse(cookies["color-mode"]);
+
+        html.htmlAttrs.push(`class="${theme.value}-mode"`);
+      } else {
+        html.htmlAttrs.push(`class="dark-mode"`);
+      }
+
+      // Reset cookie attributes to correct ones
+      if (cookies) {
+        const opts = {
+          maxAge: 60 * 60 * 24 * 365 * 10,
+          sameSite: "lax",
+          secure: true,
+          httpOnly: false,
+          path: "/",
+        };
+
+        if (cookies["auth-token"]) {
+          setCookie(event, "auth-token", cookies["auth-token"], opts);
+        }
+        if (cookies["color-mode"]) {
+          setCookie(event, "color-mode", cookies["color-mode"], opts);
+        }
+        if (cookies.cosmetics) {
+          setCookie(event, "cosmetics", cookies.cosmetics, opts);
+        }
+      }
+    } catch (err) {
+      console.error(err);
+    }
+  });
+});