feat(theme): complete Minecraft overhaul for all pages including admin/utility

frontend/src/app/admin-users/page.tsx

@@ -5,6 +5,7 @@ import { useEffect, useState } from "react";
 import { apiFetch } from "@/lib/api";
 import { readToken } from "@/lib/auth";
 import { useI18nText } from "@/lib/i18n";
+import { RefreshCw, Save, Shield, UserCog, Users } from "lucide-react";
 
 type AdminUser = {
   id: number;
@@ -75,7 +76,8 @@ export default function AdminUsersPage() {
 
   return (
     <main className="mx-auto max-w-6xl px-3 py-6 max-[390px]:px-2 sm:px-4 md:px-6 md:py-8">
-      <h1 className="text-xl font-semibold max-[390px]:text-lg sm:text-2xl">
+      <h1 className="text-xl font-semibold max-[390px]:text-lg sm:text-2xl flex items-center gap-2">
+        <Users size={24} />
         {tx("管理员用户与积分", "Admin Users & Rating")}
       </h1>
       <p className="mt-2 text-sm text-zinc-600">
@@ -85,10 +87,11 @@ export default function AdminUsersPage() {
 
       <div className="mt-4 flex flex-wrap gap-2">
         <button
-          className="rounded bg-zinc-900 px-4 py-2 text-sm text-white disabled:opacity-50"
+          className="rounded bg-zinc-900 px-4 py-2 text-sm text-white disabled:opacity-50 flex items-center gap-2"
           onClick={() => void load()}
           disabled={loading}
         >
+          <RefreshCw size={16} className={loading ? "animate-spin" : ""} />
           {loading ? tx("刷新中...", "Refreshing...") : tx("刷新用户列表", "Refresh users")}
         </button>
       </div>
@@ -103,7 +106,10 @@ export default function AdminUsersPage() {
               <tr>
                 <th className="px-3 py-2">ID</th>
                 <th className="px-3 py-2">{tx("用户名", "Username")}</th>
-                <th className="px-3 py-2">Rating</th>
+                <th className="px-3 py-2 flex items-center gap-1">
+                  <Shield size={14} />
+                  Rating
+                </th>
                 <th className="px-3 py-2">{tx("创建时间", "Created At")}</th>
                 <th className="px-3 py-2">{tx("操作", "Action")}</th>
               </tr>
@@ -130,9 +136,10 @@ export default function AdminUsersPage() {
                   <td className="px-3 py-2 text-zinc-600">{fmtTs(user.created_at)}</td>
                   <td className="px-3 py-2">
                     <button
-                      className="rounded border px-3 py-1 text-xs hover:bg-zinc-100"
+                      className="rounded border px-3 py-1 text-xs hover:bg-zinc-100 flex items-center gap-1"
                       onClick={() => void updateRating(user.id, Math.max(0, Number(user.rating) || 0))}
                     >
+                      <Save size={12} />
                       {tx("保存", "Save")}
                     </button>
                   </td>