diff --git a/src/components.d.ts b/src/components.d.ts
index eb31f7a..bc42cb3 100644
--- a/src/components.d.ts
+++ b/src/components.d.ts
@@ -13,12 +13,10 @@ declare module '@vue/runtime-core' {
     IEpLock: typeof import('~icons/ep/lock')['default']
     IEpMenu: typeof import('~icons/ep/menu')['default']
     IEpMoon: typeof import('~icons/ep/moon')['default']
-    IEpMore: typeof import('~icons/ep/more')['default']
     IEpMoreFilled: typeof import('~icons/ep/more-filled')['default']
     IEpSunny: typeof import('~icons/ep/sunny')['default']
     NAlert: typeof import('naive-ui')['NAlert']
     NButton: typeof import('naive-ui')['NButton']
-    NButtonGroup: typeof import('naive-ui')['NButtonGroup']
     NCard: typeof import('naive-ui')['NCard']
     NCode: typeof import('naive-ui')['NCode']
     NConfigProvider: typeof import('naive-ui')['NConfigProvider']
@@ -39,7 +37,6 @@ declare module '@vue/runtime-core' {
     NMenu: typeof import('naive-ui')['NMenu']
     NMessageProvider: typeof import('naive-ui')['NMessageProvider']
     NModal: typeof import('naive-ui')['NModal']
-    NNotificationProvider: typeof import('naive-ui')['NNotificationProvider']
     NPagination: typeof import('naive-ui')['NPagination']
     NPopover: typeof import('naive-ui')['NPopover']
     NScrollbar: typeof import('naive-ui')['NScrollbar']
diff --git a/src/oj/contest/detail.vue b/src/oj/contest/detail.vue
index d874da6..b8ac593 100644
--- a/src/oj/contest/detail.vue
+++ b/src/oj/contest/detail.vue
@@ -88,7 +88,11 @@ function getCurrentType(name: string): "primary" | "default" {
           <n-button :type="getCurrentType('rank')" @click="goto('rank')">
             比赛排名
           </n-button>
-          <n-button :type="getCurrentType('helper')" @click="goto('helper')">
+          <n-button
+            v-if="contestStore.isContestAdmin"
+            :type="getCurrentType('helper')"
+            @click="goto('helper')"
+          >
             管理员助手
           </n-button>
         </n-space>
diff --git a/src/shared/Monaco.vue b/src/shared/Monaco.vue
index 836c276..d3e1cac 100644
--- a/src/shared/Monaco.vue
+++ b/src/shared/Monaco.vue
@@ -42,7 +42,7 @@ onMounted(async () => {
     minimap: {
       enabled: false,
     },
-    lineNumbersMinChars: 3,
+    lineNumbersMinChars: 2,
     automaticLayout: true, // 自适应布局
     tabSize: 4,
     fontSize: isMobile.value ? 20 : 24, // 字体大小
diff --git a/src/utils/judge.ts b/src/utils/judge.ts
index 6aebfda..b538ecc 100644
--- a/src/utils/judge.ts
+++ b/src/utils/judge.ts
@@ -4,17 +4,17 @@ import { Code } from "./types"
 
 const http = axios.create({ baseURL: "https://judge0api.hyyz.izhai.net" })
 
-function encode(str: string) {
-  return btoa(unescape(encodeURIComponent(str ?? "")))
+function encode(string?: string) {
+  return btoa(String.fromCharCode(...new TextEncoder().encode(string ?? "")))
 }
 
-function decode(bytes: string) {
-  let escaped = escape(atob(bytes ?? ""))
-  try {
-    return decodeURIComponent(escaped)
-  } catch (e) {
-    return unescape(escaped)
-  }
+function decode(bytes?: string) {
+  const latin = atob(bytes ?? "")
+  return new TextDecoder("utf-8").decode(
+    Uint8Array.from({ length: latin.length }, (_, index) =>
+      latin.charCodeAt(index)
+    )
+  )
 }
 
 export async function createTestSubmission(code: Code, input: string) {