diff --git a/src/api.ts b/src/api.ts
index 21a51c0..494faf2 100644
--- a/src/api.ts
+++ b/src/api.ts
@@ -1,6 +1,13 @@
 import axios from "axios"
 import { router } from "./router"
-import type { TutorialIn, ChallengeIn, FlagType, SubmissionOut, PromptMessage, TaskStatsOut } from "./utils/type"
+import type {
+  TutorialIn,
+  ChallengeIn,
+  FlagType,
+  SubmissionOut,
+  PromptMessage,
+  TaskStatsOut,
+} from "./utils/type"
 import { BASE_URL, STORAGE_KEY } from "./utils/const"
 
 const http = axios.create({
@@ -227,7 +234,6 @@ export const Submission = {
     const res = await http.get(`/submission/stats/${taskId}`, { params })
     return res.data as TaskStatsOut
   },
-
 }
 
 export const Prompt = {
@@ -240,7 +246,9 @@ export const Prompt = {
 
   async getMessages(conversationId: string): Promise<PromptMessage[]> {
     return (
-      await http.get<PromptMessage[]>(`/prompt/conversations/${conversationId}/messages/`)
+      await http.get<PromptMessage[]>(
+        `/prompt/conversations/${conversationId}/messages/`,
+      )
     ).data
   },
 }
diff --git a/src/components/Login.vue b/src/components/Login.vue
index 8b81cc1..36aada9 100644
--- a/src/components/Login.vue
+++ b/src/components/Login.vue
@@ -180,7 +180,10 @@ async function submitStudent() {
   studentLoading.value = true
   showStudentError.value = false
   try {
-    const data = await Account.login(selectedUsername.value, studentPassword.value)
+    const data = await Account.login(
+      selectedUsername.value,
+      studentPassword.value,
+    )
     user.username = data.username
     user.role = data.role
     user.loaded = true
diff --git a/src/components/Preview.vue b/src/components/Preview.vue
index a34122e..e8ae3c4 100644
--- a/src/components/Preview.vue
+++ b/src/components/Preview.vue
@@ -5,7 +5,12 @@
       <n-button quaternary @click="download" :disabled="!showDL">下载</n-button>
       <n-button quaternary @click="open">全屏</n-button>
       <n-button quaternary v-if="props.clearable" @click="clear">清空</n-button>
-      <n-button quaternary v-if="props.showCodeButton" @click="emits('showCode')">代码</n-button>
+      <n-button
+        quaternary
+        v-if="props.showCodeButton"
+        @click="emits('showCode')"
+        >代码</n-button
+      >
       <n-button quaternary v-if="props.submissionId" @click="copyLink">
         链接
       </n-button>
diff --git a/src/components/PromptPanel.vue b/src/components/PromptPanel.vue
index f0d1d83..cca4ea6 100644
--- a/src/components/PromptPanel.vue
+++ b/src/components/PromptPanel.vue
@@ -6,7 +6,7 @@
         <span>加载历史记录…</span>
       </div>
       <div v-for="(msg, i) in messages" :key="i" :class="['message', msg.role]">
-        <div class="message-role">{{ msg.role === 'user' ? '我' : 'AI' }}</div>
+        <div class="message-role">{{ msg.role === "user" ? "我" : "AI" }}</div>
         <div class="message-content" v-html="renderContent(msg)"></div>
       </div>
       <div v-if="streaming" class="message assistant">
@@ -14,7 +14,11 @@
         <div v-if="!streamingContent" class="typing-indicator">
           <span></span><span></span><span></span>
         </div>
-        <div v-else class="message-content" v-html="renderMarkdown(streamingContent)"></div>
+        <div
+          v-else
+          class="message-content"
+          v-html="renderMarkdown(streamingContent)"
+        ></div>
         <div class="streaming-hint">AI 正在思考中…</div>
       </div>
     </div>
@@ -28,7 +32,12 @@
         @keydown.enter.exact.prevent="send"
       />
       <n-flex justify="space-between" align="center" style="margin-top: 8px">
-        <n-button text size="small" @click="newConversation" :disabled="streaming">
+        <n-button
+          text
+          size="small"
+          @click="newConversation"
+          :disabled="streaming"
+        >
           新对话
         </n-button>
         <n-button
@@ -69,13 +78,46 @@ function send() {
 const renderer = new Renderer()
 renderer.code = function ({ lang }: { text: string; lang?: string }) {
   const label = lang ? lang.toUpperCase() : "CODE"
-  const colors: Record<string, { bg: string; fg: string; dot: string; border: string; shimmer: string }> = {
-    html: { bg: "#fff5f0", fg: "#e05020", dot: "#e05020", border: "#f0d0c0", shimmer: "#fff5f0, #ffeee5, #fff5f0" },
-    css: { bg: "#f0f0ff", fg: "#6060d0", dot: "#6060d0", border: "#d0d0f0", shimmer: "#f0f0ff, #e8e8fa, #f0f0ff" },
-    js: { bg: "#fffbf0", fg: "#c0960a", dot: "#c0960a", border: "#f0e0b0", shimmer: "#fffbf0, #fff5e0, #fffbf0" },
-    javascript: { bg: "#fffbf0", fg: "#c0960a", dot: "#c0960a", border: "#f0e0b0", shimmer: "#fffbf0, #fff5e0, #fffbf0" },
+  const colors: Record<
+    string,
+    { bg: string; fg: string; dot: string; border: string; shimmer: string }
+  > = {
+    html: {
+      bg: "#fff5f0",
+      fg: "#e05020",
+      dot: "#e05020",
+      border: "#f0d0c0",
+      shimmer: "#fff5f0, #ffeee5, #fff5f0",
+    },
+    css: {
+      bg: "#f0f0ff",
+      fg: "#6060d0",
+      dot: "#6060d0",
+      border: "#d0d0f0",
+      shimmer: "#f0f0ff, #e8e8fa, #f0f0ff",
+    },
+    js: {
+      bg: "#fffbf0",
+      fg: "#c0960a",
+      dot: "#c0960a",
+      border: "#f0e0b0",
+      shimmer: "#fffbf0, #fff5e0, #fffbf0",
+    },
+    javascript: {
+      bg: "#fffbf0",
+      fg: "#c0960a",
+      dot: "#c0960a",
+      border: "#f0e0b0",
+      shimmer: "#fffbf0, #fff5e0, #fffbf0",
+    },
+  }
+  const c = colors[(lang ?? "").toLowerCase()] ?? {
+    bg: "#f0f7ff",
+    fg: "#2080f0",
+    dot: "#2080f0",
+    border: "#e0eaf5",
+    shimmer: "#f0f7ff, #e8f4f8, #f0f7ff",
   }
-  const c = colors[(lang ?? "").toLowerCase()] ?? { bg: "#f0f7ff", fg: "#2080f0", dot: "#2080f0", border: "#e0eaf5", shimmer: "#f0f7ff, #e8f4f8, #f0f7ff" }
   return `<div class="code-placeholder" style="background: linear-gradient(90deg, ${c.shimmer}); background-size: 200% 100%; border-color: ${c.border}"><span class="code-placeholder-dot" style="background: ${c.dot}"></span><span class="code-placeholder-label" style="color: ${c.fg}; background: ${c.fg}18">${label}</span><span class="code-placeholder-text">代码已自动应用到预览区</span></div>`
 }
 
@@ -88,16 +130,13 @@ function renderContent(msg: { role: string; content: string }): string {
 }
 
 // Auto-scroll to bottom on new messages
-watch(
-  [() => messages.value.length, streamingContent],
-  () => {
-    nextTick(() => {
-      if (messagesRef.value) {
-        messagesRef.value.scrollTop = messagesRef.value.scrollHeight
-      }
-    })
-  }
-)
+watch([() => messages.value.length, streamingContent], () => {
+  nextTick(() => {
+    if (messagesRef.value) {
+      messagesRef.value.scrollTop = messagesRef.value.scrollHeight
+    }
+  })
+})
 </script>
 
 <style scoped>
@@ -180,13 +219,22 @@ watch(
 }
 
 @keyframes shimmer {
-  0% { background-position: -200% 0; }
-  100% { background-position: 200% 0; }
+  0% {
+    background-position: -200% 0;
+  }
+  100% {
+    background-position: 200% 0;
+  }
 }
 
 @keyframes pulse {
-  0%, 100% { opacity: 0.4; }
-  50% { opacity: 1; }
+  0%,
+  100% {
+    opacity: 0.4;
+  }
+  50% {
+    opacity: 1;
+  }
 }
 
 .typing-indicator {
@@ -212,8 +260,16 @@ watch(
 }
 
 @keyframes bounce {
-  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
-  30% { transform: translateY(-6px); opacity: 1; }
+  0%,
+  60%,
+  100% {
+    transform: translateY(0);
+    opacity: 0.4;
+  }
+  30% {
+    transform: translateY(-6px);
+    opacity: 1;
+  }
 }
 
 .streaming-hint {
@@ -237,5 +293,4 @@ watch(
   font-size: 13px;
   justify-content: center;
 }
-
 </style>
diff --git a/src/components/Task.vue b/src/components/Task.vue
index 8b729f6..1fa9e33 100644
--- a/src/components/Task.vue
+++ b/src/components/Task.vue
@@ -38,15 +38,11 @@
         </template>
       </n-flex>
       <n-flex>
-        <n-button
-          v-if="(roleAdmin || roleSuper) && taskTab === TASK_TYPE.Challenge && taskId > 0"
-          text
-          @click="statsModal = true"
-        >
+        <n-button v-if="roleSuper" text @click="statsModal = true">
           <Icon :width="16" icon="lucide:bar-chart-2"></Icon>
         </n-button>
         <n-button
-        v-if="authed"
+          v-if="authed"
           text
           @click="$router.push({ name: 'submissions', params: { page: 1 } })"
         >
diff --git a/src/components/TaskStatsModal.vue b/src/components/TaskStatsModal.vue
index 79a9de1..2ceb0e5 100644
--- a/src/components/TaskStatsModal.vue
+++ b/src/components/TaskStatsModal.vue
@@ -16,24 +16,38 @@
 
       <template v-else-if="stats">
         <!-- 班级筛选 -->
-        <n-flex align="center" style="margin-bottom: 16px; flex-wrap: wrap; gap: 6px">
+        <n-flex
+          align="center"
+          style="margin-bottom: 16px; flex-wrap: wrap; gap: 6px"
+        >
           <span style="color: #666; font-size: 12px">班级筛选：</span>
           <n-button
             size="small"
             :type="selectedClass === null ? 'primary' : 'default'"
             @click="selectClass(null)"
-          >全部</n-button>
+            >全部</n-button
+          >
           <n-button
             v-for="c in stats.classes"
             :key="c"
             size="small"
             :type="selectedClass === c ? 'primary' : 'default'"
             @click="selectClass(c)"
-          >{{ c }}</n-button>
+            >{{ c }}</n-button
+          >
         </n-flex>
 
         <!-- 关键指标 -->
-        <div style="display: grid; grid-template-columns: repeat(5, 1fr); border: 1px solid #eee; border-radius: 6px; overflow: hidden; margin-bottom: 12px">
+        <div
+          style="
+            display: grid;
+            grid-template-columns: repeat(5, 1fr);
+            border: 1px solid #eee;
+            border-radius: 6px;
+            overflow: hidden;
+            margin-bottom: 12px;
+          "
+        >
           <div
             v-for="(metric, i) in metrics"
             :key="metric.label"
@@ -43,139 +57,384 @@
               borderRight: i < metrics.length - 1 ? '1px solid #eee' : 'none',
             }"
           >
-            <div :style="{ fontSize: '20px', fontWeight: '700', color: metric.color }">{{ metric.value }}</div>
-            <div style="color: #888; font-size: 11px; margin-top: 2px">{{ metric.label }}</div>
+            <div
+              :style="{
+                fontSize: '20px',
+                fontWeight: '700',
+                color: metric.color,
+              }"
+            >
+              {{ metric.value }}
+            </div>
+            <div style="color: #888; font-size: 11px; margin-top: 2px">
+              {{ metric.label }}
+            </div>
           </div>
         </div>
 
         <!-- 未提交名单（可折叠） -->
-        <div style="border: 1px solid #eee; border-radius: 6px; margin-bottom: 8px; overflow: hidden">
+        <div
+          style="
+            border: 1px solid #eee;
+            border-radius: 6px;
+            margin-bottom: 8px;
+            overflow: hidden;
+          "
+        >
           <div
-            style="padding: 10px 14px; display: flex; align-items: center; justify-content: space-between; cursor: pointer; background: #fff8f8"
+            style="
+              padding: 10px 14px;
+              display: flex;
+              align-items: center;
+              justify-content: space-between;
+              cursor: pointer;
+              background: #fff8f8;
+            "
             @click="showUnsubmitted = !showUnsubmitted"
           >
             <n-flex align="center" :size="6">
-              <span style="width: 7px; height: 7px; background: #d03050; border-radius: 50%; display: inline-block"></span>
-              <span style="font-weight: 600; color: #d03050; font-size: 12px">未提交（{{ stats.unsubmitted_count }}人）</span>
+              <span
+                style="
+                  width: 7px;
+                  height: 7px;
+                  background: #d03050;
+                  border-radius: 50%;
+                  display: inline-block;
+                "
+              ></span>
+              <span style="font-weight: 600; color: #d03050; font-size: 12px"
+                >未提交（{{ stats.unsubmitted_count }}人）</span
+              >
             </n-flex>
-            <Icon :icon="showUnsubmitted ? 'lucide:chevron-down' : 'lucide:chevron-right'" :width="14" style="color: #aaa" />
+            <Icon
+              :icon="
+                showUnsubmitted ? 'lucide:chevron-down' : 'lucide:chevron-right'
+              "
+              :width="14"
+              style="color: #aaa"
+            />
           </div>
-          <div v-if="showUnsubmitted" style="padding: 10px 14px; background: #fff8f8; display: flex; flex-wrap: wrap; gap: 5px">
+          <div
+            v-if="showUnsubmitted"
+            style="
+              padding: 10px 14px;
+              background: #fff8f8;
+              display: flex;
+              flex-wrap: wrap;
+              gap: 5px;
+            "
+          >
             <n-tag
               v-for="u in stats.unsubmitted_users"
               :key="u.username"
               size="small"
               :bordered="true"
               style="border-color: #ffd0d0; background: #fff"
-            >{{ u.username }} <span style="color: #bbb; margin-left: 4px">{{ u.classname }}</span></n-tag>
-            <span v-if="!stats.unsubmitted_users.length" style="color: #aaa; font-size: 12px">暂无</span>
+              >{{ u.username }}
+              <span style="color: #bbb; margin-left: 4px">{{
+                u.classname
+              }}</span></n-tag
+            >
+            <span
+              v-if="!stats.unsubmitted_users.length"
+              style="color: #aaa; font-size: 12px"
+              >暂无</span
+            >
           </div>
         </div>
 
         <!-- 未打分名单（可折叠） -->
-        <div style="border: 1px solid #eee; border-radius: 6px; margin-bottom: 12px; overflow: hidden">
+        <div
+          style="
+            border: 1px solid #eee;
+            border-radius: 6px;
+            margin-bottom: 12px;
+            overflow: hidden;
+          "
+        >
           <div
-            style="padding: 10px 14px; display: flex; align-items: center; justify-content: space-between; cursor: pointer; background: #fff8f8"
+            style="
+              padding: 10px 14px;
+              display: flex;
+              align-items: center;
+              justify-content: space-between;
+              cursor: pointer;
+              background: #fff8f8;
+            "
             @click="showUnrated = !showUnrated"
           >
             <n-flex align="center" :size="6">
-              <span style="width: 7px; height: 7px; background: #d03050; border-radius: 50%; display: inline-block"></span>
-              <span style="font-weight: 600; color: #d03050; font-size: 12px">未打分（{{ stats.unrated_count }}人）</span>
-              <span style="font-size: 11px; color: #aaa">— 还没给任何提交打过分</span>
+              <span
+                style="
+                  width: 7px;
+                  height: 7px;
+                  background: #d03050;
+                  border-radius: 50%;
+                  display: inline-block;
+                "
+              ></span>
+              <span style="font-weight: 600; color: #d03050; font-size: 12px"
+                >未打分（{{ stats.unrated_count }}人）</span
+              >
+              <span style="font-size: 11px; color: #aaa"
+                >— 还没给任何提交打过分</span
+              >
             </n-flex>
-            <Icon :icon="showUnrated ? 'lucide:chevron-down' : 'lucide:chevron-right'" :width="14" style="color: #aaa" />
+            <Icon
+              :icon="
+                showUnrated ? 'lucide:chevron-down' : 'lucide:chevron-right'
+              "
+              :width="14"
+              style="color: #aaa"
+            />
           </div>
-          <div v-if="showUnrated" style="padding: 10px 14px; background: #fff8f8; display: flex; flex-wrap: wrap; gap: 5px">
+          <div
+            v-if="showUnrated"
+            style="
+              padding: 10px 14px;
+              background: #fff8f8;
+              display: flex;
+              flex-wrap: wrap;
+              gap: 5px;
+            "
+          >
             <n-tag
               v-for="u in stats.unrated_users"
               :key="u.username"
               size="small"
               :bordered="true"
               style="border-color: #ffd0d0; background: #fff"
-            >{{ u.username }} <span style="color: #bbb; margin-left: 4px">{{ u.classname }}</span></n-tag>
-            <span v-if="!stats.unrated_users.length" style="color: #aaa; font-size: 12px">暂无</span>
+              >{{ u.username }}
+              <span style="color: #bbb; margin-left: 4px">{{
+                u.classname
+              }}</span></n-tag
+            >
+            <span
+              v-if="!stats.unrated_users.length"
+              style="color: #aaa; font-size: 12px"
+              >暂无</span
+            >
           </div>
         </div>
 
         <!-- 提交次数分布 -->
         <div style="margin-bottom: 12px">
-          <div style="font-weight: 600; font-size: 13px; margin-bottom: 8px; color: #333">
+          <div
+            style="
+              font-weight: 600;
+              font-size: 13px;
+              margin-bottom: 8px;
+              color: #333;
+            "
+          >
             提交次数分布
-            <span style="font-size: 11px; color: #aaa; font-weight: 400">（已提交的 {{ stats.submitted_count }} 人）</span>
+            <span style="font-size: 11px; color: #aaa; font-weight: 400"
+              >（已提交的 {{ stats.submitted_count }} 人）</span
+            >
           </div>
           <div style="display: flex; gap: 8px">
             <div
               v-for="bucket in countBuckets"
               :key="bucket.label"
-              :style="{ flex: 1, border: `1px solid ${bucket.borderColor}`, borderRadius: '6px', padding: '10px 8px', textAlign: 'center', background: bucket.bg }"
+              :style="{
+                flex: 1,
+                border: `1px solid ${bucket.borderColor}`,
+                borderRadius: '6px',
+                padding: '10px 8px',
+                textAlign: 'center',
+                background: bucket.bg,
+              }"
             >
-              <div :style="{ fontSize: '20px', fontWeight: '700', color: bucket.color }">{{ bucket.value }}</div>
-              <div style="color: #aaa; font-size: 11px; margin-top: 2px">{{ bucket.label }}</div>
-              <div style="margin-top: 8px; background: #e8e8e8; border-radius: 3px; height: 4px">
-                <div :style="{ background: bucket.color, height: '4px', borderRadius: '3px', width: bucketPct(bucket.value) }"></div>
+              <div
+                :style="{
+                  fontSize: '20px',
+                  fontWeight: '700',
+                  color: bucket.color,
+                }"
+              >
+                {{ bucket.value }}
+              </div>
+              <div style="color: #aaa; font-size: 11px; margin-top: 2px">
+                {{ bucket.label }}
+              </div>
+              <div
+                style="
+                  margin-top: 8px;
+                  background: #e8e8e8;
+                  border-radius: 3px;
+                  height: 4px;
+                "
+              >
+                <div
+                  :style="{
+                    background: bucket.color,
+                    height: '4px',
+                    borderRadius: '3px',
+                    width: bucketPct(bucket.value),
+                  }"
+                ></div>
+              </div>
+              <div style="color: #bbb; font-size: 10px; margin-top: 3px">
+                {{ bucketPct(bucket.value) }}
               </div>
-              <div style="color: #bbb; font-size: 10px; margin-top: 3px">{{ bucketPct(bucket.value) }}</div>
             </div>
           </div>
         </div>
 
         <!-- 分数分布 -->
         <div style="margin-bottom: 12px">
-          <div style="font-weight: 600; font-size: 13px; margin-bottom: 8px; color: #333">
+          <div
+            style="
+              font-weight: 600;
+              font-size: 13px;
+              margin-bottom: 8px;
+              color: #333;
+            "
+          >
             分数分布
-            <span style="font-size: 11px; color: #aaa; font-weight: 400">（1–5 星，已打分提交）</span>
+            <span style="font-size: 11px; color: #aaa; font-weight: 400"
+              >（1–5 星，已打分提交）</span
+            >
           </div>
-          <div style="display: flex; align-items: flex-end; gap: 6px; height: 80px">
+          <div
+            style="display: flex; align-items: flex-end; gap: 6px; height: 80px"
+          >
             <div
               v-for="bar in scoreBars"
               :key="bar.label"
-              style="flex: 1; display: flex; flex-direction: column; align-items: center"
+              style="
+                flex: 1;
+                display: flex;
+                flex-direction: column;
+                align-items: center;
+              "
             >
-              <div style="color: #aaa; font-size: 11px; margin-bottom: 3px">{{ bar.value }}</div>
-              <div :style="{ background: bar.color, width: '100%', height: bar.height, borderRadius: '3px 3px 0 0', minHeight: '3px' }"></div>
-              <div style="color: #aaa; font-size: 11px; margin-top: 4px">{{ bar.label }}</div>
+              <div style="color: #aaa; font-size: 11px; margin-bottom: 3px">
+                {{ bar.value }}
+              </div>
+              <div
+                :style="{
+                  background: bar.color,
+                  width: '100%',
+                  height: bar.height,
+                  borderRadius: '3px 3px 0 0',
+                  minHeight: '3px',
+                }"
+              ></div>
+              <div style="color: #aaa; font-size: 11px; margin-top: 4px">
+                {{ bar.label }}
+              </div>
             </div>
           </div>
         </div>
 
         <!-- 人气提交 Top 5 -->
         <div style="margin-bottom: 12px">
-          <div style="font-weight: 600; font-size: 13px; margin-bottom: 8px; color: #333">
+          <div
+            style="
+              font-weight: 600;
+              font-size: 13px;
+              margin-bottom: 8px;
+              color: #333;
+            "
+          >
             人气提交 Top 5
-            <span style="font-size: 11px; color: #aaa; font-weight: 400">（按打分人数）</span>
+            <span style="font-size: 11px; color: #aaa; font-weight: 400"
+              >（按打分人数）</span
+            >
           </div>
           <div style="display: flex; flex-direction: column; gap: 5px">
             <div
               v-for="(sub, i) in stats.top_submissions"
               :key="sub.submission_id"
-              style="display: flex; align-items: center; gap: 10px; padding: 6px 10px; background: #f8f8f8; border-radius: 6px; cursor: pointer"
+              style="
+                display: flex;
+                align-items: center;
+                gap: 10px;
+                padding: 6px 10px;
+                background: #f8f8f8;
+                border-radius: 6px;
+                cursor: pointer;
+              "
               @click="viewSubmission(sub.submission_id)"
             >
               <div
-                :style="{ width: '20px', height: '20px', background: rankColor(i), borderRadius: '50%', display: 'flex', alignItems: 'center', justifyContent: 'center', color: '#fff', fontWeight: '700', fontSize: '11px', flexShrink: 0 }"
-              >{{ i + 1 }}</div>
+                :style="{
+                  width: '20px',
+                  height: '20px',
+                  background: rankColor(i),
+                  borderRadius: '50%',
+                  display: 'flex',
+                  alignItems: 'center',
+                  justifyContent: 'center',
+                  color: '#fff',
+                  fontWeight: '700',
+                  fontSize: '11px',
+                  flexShrink: 0,
+                }"
+              >
+                {{ i + 1 }}
+              </div>
               <div style="flex: 1">
-                <div style="font-weight: 500; font-size: 13px">{{ sub.username }}</div>
-                <div style="color: #aaa; font-size: 11px">{{ sub.score.toFixed(1) }} 分 · {{ sub.rating_count }} 人打分 · {{ sub.classname }}</div>
+                <div style="font-weight: 500; font-size: 13px">
+                  {{ sub.username }}
+                </div>
+                <div style="color: #aaa; font-size: 11px">
+                  {{ sub.score.toFixed(1) }} 分 · {{ sub.rating_count }} 人打分
+                  · {{ sub.classname }}
+                </div>
               </div>
               <div style="color: #2080f0; font-size: 12px">查看 →</div>
             </div>
-            <span v-if="!stats.top_submissions.length" style="color: #aaa; font-size: 12px">暂无打分记录</span>
+            <span
+              v-if="!stats.top_submissions.length"
+              style="color: #aaa; font-size: 12px"
+              >暂无打分记录</span
+            >
           </div>
         </div>
 
         <!-- 标记统计 -->
         <div>
-          <div style="font-weight: 600; font-size: 13px; margin-bottom: 8px; color: #333">标记统计</div>
+          <div
+            style="
+              font-weight: 600;
+              font-size: 13px;
+              margin-bottom: 8px;
+              color: #333;
+            "
+          >
+            标记统计
+          </div>
           <n-flex :size="8" style="flex-wrap: wrap">
             <div
               v-for="flag in flagBadges"
               :key="flag.label"
-              :style="{ display: 'flex', alignItems: 'center', gap: '6px', padding: '4px 10px', background: flag.bg, borderRadius: '4px', border: `1px solid ${flag.border}` }"
+              :style="{
+                display: 'flex',
+                alignItems: 'center',
+                gap: '6px',
+                padding: '4px 10px',
+                background: flag.bg,
+                borderRadius: '4px',
+                border: `1px solid ${flag.border}`,
+              }"
             >
-              <span :style="{ width: '7px', height: '7px', background: flag.color, borderRadius: '50%', display: 'inline-block' }"></span>
-              <span :style="{ color: flag.color, fontSize: '12px' }">{{ flag.label }}</span>
-              <span style="font-weight: 700; font-size: 13px; color: #333">{{ flag.value }}</span>
+              <span
+                :style="{
+                  width: '7px',
+                  height: '7px',
+                  background: flag.color,
+                  borderRadius: '50%',
+                  display: 'inline-block',
+                }"
+              ></span>
+              <span :style="{ color: flag.color, fontSize: '12px' }">{{
+                flag.label
+              }}</span>
+              <span style="font-weight: 700; font-size: 13px; color: #333">{{
+                flag.value
+              }}</span>
             </div>
           </n-flex>
         </div>
@@ -235,7 +494,11 @@ const metrics = computed(() => {
   return [
     { label: "已提交", value: stats.value.submitted_count, color: "#18a058" },
     { label: "未提交", value: stats.value.unsubmitted_count, color: "#d03050" },
-    { label: "平均分", value: stats.value.average_score?.toFixed(1) ?? "—", color: "#2080f0" },
+    {
+      label: "平均分",
+      value: stats.value.average_score?.toFixed(1) ?? "—",
+      color: "#2080f0",
+    },
     { label: "未打分", value: stats.value.unrated_count, color: "#d03050" },
     { label: "参与排名", value: stats.value.nominated_count, color: "#f0a020" },
   ]
@@ -245,10 +508,34 @@ const countBuckets = computed(() => {
   if (!stats.value) return []
   const d = stats.value.submission_count_distribution
   return [
-    { label: "仅 1 次", value: d.count_1, color: "#888", bg: "#fafafa", borderColor: "#e0e0e0" },
-    { label: "2 次", value: d.count_2, color: "#2080f0", bg: "#f0f7ff", borderColor: "#d0e8ff" },
-    { label: "3 次", value: d.count_3, color: "#18a058", bg: "#f0fff4", borderColor: "#c8e8d0" },
-    { label: "4 次+", value: d.count_4_plus, color: "#f0a020", bg: "#fffbf0", borderColor: "#ffe0a0" },
+    {
+      label: "仅 1 次",
+      value: d.count_1,
+      color: "#888",
+      bg: "#fafafa",
+      borderColor: "#e0e0e0",
+    },
+    {
+      label: "2 次",
+      value: d.count_2,
+      color: "#2080f0",
+      bg: "#f0f7ff",
+      borderColor: "#d0e8ff",
+    },
+    {
+      label: "3 次",
+      value: d.count_3,
+      color: "#18a058",
+      bg: "#f0fff4",
+      borderColor: "#c8e8d0",
+    },
+    {
+      label: "4 次+",
+      value: d.count_4_plus,
+      color: "#f0a020",
+      bg: "#fffbf0",
+      borderColor: "#ffe0a0",
+    },
   ]
 })
 
@@ -271,10 +558,34 @@ const flagBadges = computed(() => {
   if (!stats.value) return []
   const f = stats.value.flag_stats
   return [
-    { label: "值得展示", value: f.red, color: "#d03050", bg: "#fff0f0", border: "#ffd0d0" },
-    { label: "需要讲解", value: f.blue, color: "#2080f0", bg: "#f0f7ff", border: "#c8deff" },
-    { label: "优秀作品", value: f.green, color: "#18a058", bg: "#f0fff4", border: "#b8e8c8" },
-    { label: "需要改进", value: f.yellow, color: "#f0a020", bg: "#fffbf0", border: "#ffe8a0" },
+    {
+      label: "值得展示",
+      value: f.red,
+      color: "#d03050",
+      bg: "#fff0f0",
+      border: "#ffd0d0",
+    },
+    {
+      label: "需要讲解",
+      value: f.blue,
+      color: "#2080f0",
+      bg: "#f0f7ff",
+      border: "#c8deff",
+    },
+    {
+      label: "优秀作品",
+      value: f.green,
+      color: "#18a058",
+      bg: "#f0fff4",
+      border: "#b8e8c8",
+    },
+    {
+      label: "需要改进",
+      value: f.yellow,
+      color: "#f0a020",
+      bg: "#fffbf0",
+      border: "#ffe8a0",
+    },
   ]
 })
 
diff --git a/src/components/Tutorial.vue b/src/components/Tutorial.vue
index 0f8ddee..226f417 100644
--- a/src/components/Tutorial.vue
+++ b/src/components/Tutorial.vue
@@ -85,7 +85,9 @@ function flash(btn: HTMLButtonElement, done: string, original: string) {
 
 function setupCodeActions() {
   $content.value?.addEventListener("click", (e: MouseEvent) => {
-    const btn = (e.target as HTMLElement).closest<HTMLButtonElement>("[data-action]")
+    const btn = (e.target as HTMLElement).closest<HTMLButtonElement>(
+      "[data-action]",
+    )
     if (!btn) return
     const wrapper = btn.closest<HTMLElement>("[data-lang]")!
     const lang = wrapper.dataset.lang ?? "html"
diff --git a/src/components/submissions/ChainModal.vue b/src/components/submissions/ChainModal.vue
index 57cd3ee..175293d 100644
--- a/src/components/submissions/ChainModal.vue
+++ b/src/components/submissions/ChainModal.vue
@@ -7,10 +7,18 @@
     @update:show="$emit('update:show', $event)"
   >
     <n-spin :show="loading">
-      <n-empty v-if="!loading && rounds.length === 0" description="暂无对话记录" />
+      <n-empty
+        v-if="!loading && rounds.length === 0"
+        description="暂无对话记录"
+      />
       <div
         v-else
-        style="display: grid; grid-template-columns: 1fr 1fr; gap: 16px; height: 75vh"
+        style="
+          display: grid;
+          grid-template-columns: 1fr 1fr;
+          gap: 16px;
+          height: 75vh;
+        "
       >
         <div
           style="
@@ -25,26 +33,46 @@
           <div
             v-for="(round, index) in rounds"
             :key="index"
-            style="display: flex; gap: 10px; align-items: flex-start; cursor: pointer"
+            style="
+              display: flex;
+              gap: 10px;
+              align-items: flex-start;
+              cursor: pointer;
+            "
             @click="selectedRound = index"
           >
             <div
               :style="{
-                flexShrink: 0, width: '22px', height: '22px', borderRadius: '50%',
+                flexShrink: 0,
+                width: '22px',
+                height: '22px',
+                borderRadius: '50%',
                 background: selectedRound === index ? '#2080f0' : '#c2d5fb',
-                color: '#fff', fontSize: '12px', fontWeight: 'bold',
-                display: 'flex', alignItems: 'center', justifyContent: 'center',
-                marginTop: '2px', transition: 'background 0.2s',
+                color: '#fff',
+                fontSize: '12px',
+                fontWeight: 'bold',
+                display: 'flex',
+                alignItems: 'center',
+                justifyContent: 'center',
+                marginTop: '2px',
+                transition: 'background 0.2s',
               }"
             >
               {{ index + 1 }}
             </div>
             <div
               :style="{
-                flex: 1, padding: '10px 14px', borderRadius: '8px',
+                flex: 1,
+                padding: '10px 14px',
+                borderRadius: '8px',
                 background: selectedRound === index ? '#e8f0fe' : '#f5f5f5',
-                border: selectedRound === index ? '1px solid #2080f0' : '1px solid #e0e0e0',
-                fontSize: '13px', lineHeight: '1.6', transition: 'all 0.2s',
+                border:
+                  selectedRound === index
+                    ? '1px solid #2080f0'
+                    : '1px solid #e0e0e0',
+                fontSize: '13px',
+                lineHeight: '1.6',
+                transition: 'all 0.2s',
               }"
             >
               {{ round.question }}
@@ -60,7 +88,12 @@
             :srcdoc="selectedPageHtml"
             :key="selectedRound"
             sandbox="allow-scripts"
-            style="flex: 1; border: 1px solid #e0e0e0; border-radius: 6px; background: #fff"
+            style="
+              flex: 1;
+              border: 1px solid #e0e0e0;
+              border-radius: 6px;
+              background: #fff;
+            "
           />
           <n-empty v-else description="该轮无网页代码" style="margin: auto" />
         </div>
@@ -86,10 +119,17 @@ const messages = ref<PromptMessage[]>([])
 const selectedRound = ref(0)
 
 const rounds = computed(() => {
-  const result: { question: string; html: string | null; css: string | null; js: string | null }[] = []
+  const result: {
+    question: string
+    html: string | null
+    css: string | null
+    js: string | null
+  }[] = []
   for (const [i, msg] of messages.value.entries()) {
     if (msg.role !== "user") continue
-    let html: string | null = null, css: string | null = null, js: string | null = null
+    let html: string | null = null,
+      css: string | null = null,
+      js: string | null = null
     for (const reply of messages.value.slice(i + 1)) {
       if (reply.role === "user") break
       if (reply.role === "assistant" && reply.code_html) {
diff --git a/src/components/submissions/CodeModal.vue b/src/components/submissions/CodeModal.vue
index d87cac2..0300561 100644
--- a/src/components/submissions/CodeModal.vue
+++ b/src/components/submissions/CodeModal.vue
@@ -1,9 +1,16 @@
 <template>
-  <n-modal preset="card" :show="show" style="max-width: 60%" @update:show="$emit('update:show', $event)">
+  <n-modal
+    preset="card"
+    :show="show"
+    style="max-width: 60%"
+    @update:show="$emit('update:show', $event)"
+  >
     <template #header>
       <n-flex align="center">
         <span>前端代码</span>
-        <n-button tertiary @click="$emit('copy-to-editor')">复制到编辑框</n-button>
+        <n-button tertiary @click="$emit('copy-to-editor')"
+          >复制到编辑框</n-button
+        >
       </n-flex>
     </template>
     <n-tabs animated type="segment">
diff --git a/src/components/submissions/ExpandedSubTable.vue b/src/components/submissions/ExpandedSubTable.vue
index c936971..1d451e0 100644
--- a/src/components/submissions/ExpandedSubTable.vue
+++ b/src/components/submissions/ExpandedSubTable.vue
@@ -14,7 +14,13 @@
 
 <script setup lang="ts">
 import { computed, h } from "vue"
-import { NButton, NDataTable, NPopconfirm, NSpin, type DataTableColumn } from "naive-ui"
+import {
+  NButton,
+  NDataTable,
+  NPopconfirm,
+  NSpin,
+  type DataTableColumn,
+} from "naive-ui"
 import type { SubmissionOut } from "../../utils/type"
 import { TASK_TYPE } from "../../utils/const"
 import { parseTime } from "../../utils/helper"
@@ -61,10 +67,14 @@ const subColumns = computed((): DataTableColumn<SubmissionOut>[] => [
     render: (r) => {
       const myScore = r.my_score > 0 ? String(r.my_score) : "-"
       const avgScore = r.score > 0 ? r.score.toFixed(2) : "-"
-      return h("div", { style: { display: "flex", gap: "6px", alignItems: "baseline" } }, [
-        h("span", avgScore),
-        h("span", { style: { fontSize: "11px", color: "#999" } }, myScore),
-      ])
+      return h(
+        "div",
+        { style: { display: "flex", gap: "6px", alignItems: "baseline" } },
+        [
+          h("span", avgScore),
+          h("span", { style: { fontSize: "11px", color: "#999" } }, myScore),
+        ],
+      )
     },
   },
   {
@@ -73,55 +83,77 @@ const subColumns = computed((): DataTableColumn<SubmissionOut>[] => [
     width: 60,
     render: (r: SubmissionOut) => {
       if (r.username !== user.username) {
-        return r.nominated ? h("span", { style: { color: "#f0a020" } }, "🏅") : null
+        return r.nominated
+          ? h("span", { style: { color: "#f0a020" } }, "🏅")
+          : null
       }
       return h(
         NButton,
         {
           text: true,
           title: r.nominated ? "已参与排名（点击可重新提名）" : "参与排名",
-          onClick: (e: Event) => { e.stopPropagation(); emit("nominate", r) },
+          onClick: (e: Event) => {
+            e.stopPropagation()
+            emit("nominate", r)
+          },
         },
         () => (r.nominated ? "🏅" : "☆"),
       )
     },
   },
   ...(isChallenge.value
-    ? [{
-        title: "提示词",
-        key: "conversation_id",
-        width: 70,
-        render: (r: SubmissionOut) => {
-          if (!r.conversation_id) return "-"
-          return h(
-            NButton,
-            { text: true, type: "primary", onClick: (e: Event) => { e.stopPropagation(); emit("show-chain", r.conversation_id!) } },
-            () => "查看",
-          )
-        },
-      } as DataTableColumn<SubmissionOut>]
+    ? [
+        {
+          title: "提示词",
+          key: "conversation_id",
+          width: 70,
+          render: (r: SubmissionOut) => {
+            if (!r.conversation_id) return "-"
+            return h(
+              NButton,
+              {
+                text: true,
+                type: "primary",
+                onClick: (e: Event) => {
+                  e.stopPropagation()
+                  emit("show-chain", r.conversation_id!)
+                },
+              },
+              () => "查看",
+            )
+          },
+        } as DataTableColumn<SubmissionOut>,
+      ]
     : []),
   ...(!isChallenge.value
-    ? [{
-        title: "操作",
-        key: "actions",
-        width: 60,
-        render: (r: SubmissionOut) => {
-          if (r.username !== user.username) return null
-          return h(
-            NPopconfirm,
-            { onPositiveClick: () => emit("delete", r, props.row.id) },
-            {
-              trigger: () => h(
-                NButton,
-                { text: true, type: "error", size: "small", onClick: (e: Event) => e.stopPropagation() },
-                () => "删除",
-              ),
-              default: () => "确定删除这次提交？",
-            },
-          )
-        },
-      } as DataTableColumn<SubmissionOut>]
+    ? [
+        {
+          title: "操作",
+          key: "actions",
+          width: 60,
+          render: (r: SubmissionOut) => {
+            if (r.username !== user.username) return null
+            return h(
+              NPopconfirm,
+              { onPositiveClick: () => emit("delete", r, props.row.id) },
+              {
+                trigger: () =>
+                  h(
+                    NButton,
+                    {
+                      text: true,
+                      type: "error",
+                      size: "small",
+                      onClick: (e: Event) => e.stopPropagation(),
+                    },
+                    () => "删除",
+                  ),
+                default: () => "确定删除这次提交？",
+              },
+            )
+          },
+        } as DataTableColumn<SubmissionOut>,
+      ]
     : []),
 ])
 </script>
diff --git a/src/components/submissions/FlagCell.vue b/src/components/submissions/FlagCell.vue
index 5df4fe4..56bd370 100644
--- a/src/components/submissions/FlagCell.vue
+++ b/src/components/submissions/FlagCell.vue
@@ -13,14 +13,23 @@
         <span style="display: flex; align-items: center; gap: 6px">
           <span
             :style="{
-              display: 'inline-block', width: '10px', height: '10px',
-              borderRadius: '50%', backgroundColor: opt.color,
+              display: 'inline-block',
+              width: '10px',
+              height: '10px',
+              borderRadius: '50%',
+              backgroundColor: opt.color,
             }"
           />
           {{ opt.label }}
         </span>
       </n-button>
-      <n-button v-if="flag" text block type="error" @click="$emit('update:flag', null)">
+      <n-button
+        v-if="flag"
+        text
+        block
+        type="error"
+        @click="$emit('update:flag', null)"
+      >
         清除
       </n-button>
     </n-space>
@@ -32,7 +41,11 @@
 import { computed } from "vue"
 import type { FlagType } from "../../utils/type"
 
-const FLAG_OPTIONS: { value: NonNullable<FlagType>; color: string; label: string }[] = [
+const FLAG_OPTIONS: {
+  value: NonNullable<FlagType>
+  color: string
+  label: string
+}[] = [
   { value: "red", color: "#e03030", label: "值得展示" },
   { value: "blue", color: "#2080f0", label: "需要讲解" },
   { value: "green", color: "#18a058", label: "优秀作品" },
diff --git a/src/pages/ChallengeHome.vue b/src/pages/ChallengeHome.vue
index b12869d..0a1de15 100644
--- a/src/pages/ChallengeHome.vue
+++ b/src/pages/ChallengeHome.vue
@@ -9,7 +9,11 @@
             </n-button>
           </template>
           <n-tab-pane name="desc" tab="挑战描述" display-directive="show">
-            <div class="markdown-body" style="padding: 12px; overflow-y: auto; height: 100%" v-html="challengeContent" />
+            <div
+              class="markdown-body"
+              style="padding: 12px; overflow-y: auto; height: 100%"
+              v-html="challengeContent"
+            />
           </n-tab-pane>
           <n-tab-pane name="chat" tab="AI 对话" display-directive="show">
             <PromptPanel />
@@ -19,11 +23,24 @@
     </template>
     <template #2>
       <div class="right-panel">
-        <Preview :html="html" :css="css" :js="js" show-code-button clearable @showCode="showCode = true" @clear="clearAll" />
+        <Preview
+          :html="html"
+          :css="css"
+          :js="js"
+          show-code-button
+          clearable
+          @showCode="showCode = true"
+          @clear="clearAll"
+        />
       </div>
     </template>
   </n-split>
-  <n-modal v-model:show="showCode" preset="card" title="代码" style="width: 700px">
+  <n-modal
+    v-model:show="showCode"
+    preset="card"
+    title="代码"
+    style="width: 700px"
+  >
     <n-tabs type="line">
       <n-tab-pane name="html" tab="HTML">
         <n-code :code="html" language="html" />
@@ -49,7 +66,14 @@ import Preview from "../components/Preview.vue"
 import { Challenge, Submission } from "../api"
 import { html, css, js } from "../store/editors"
 import { taskId } from "../store/task"
-import { connectPrompt, disconnectPrompt, conversationId, streaming, setOnCodeComplete, loadHistory } from "../store/prompt"
+import {
+  connectPrompt,
+  disconnectPrompt,
+  conversationId,
+  streaming,
+  setOnCodeComplete,
+  loadHistory,
+} from "../store/prompt"
 
 const route = useRoute()
 const router = useRouter()
@@ -71,7 +95,7 @@ async function loadChallenge() {
   taskId.value = data.task_ptr
   challengeTitle.value = `#${data.display} ${data.title}`
   challengeContent.value = await marked.parse(data.content, { async: true })
-  loadHistory(data.task_ptr)   // HTTP preload — async, non-blocking
+  loadHistory(data.task_ptr) // HTTP preload — async, non-blocking
   connectPrompt(data.task_ptr) // WebSocket — synchronous open
   setOnCodeComplete(async (code) => {
     if (!conversationId.value) return
diff --git a/src/pages/Submissions.vue b/src/pages/Submissions.vue
index 903b529..8ccc247 100644
--- a/src/pages/Submissions.vue
+++ b/src/pages/Submissions.vue
@@ -7,7 +7,10 @@
     :max="0.8"
   >
     <template #1>
-      <n-flex vertical style="height: 100%; padding-right: 10px; overflow: hidden">
+      <n-flex
+        vertical
+        style="height: 100%; padding-right: 10px; overflow: hidden"
+      >
         <n-flex justify="space-between" style="flex-shrink: 0">
           <n-button secondary @click="() => goHome($router, taskTab, step)">
             返回首页
@@ -21,14 +24,23 @@
               :options="flagFilterOptions"
               @update:value="handleFlagSelect"
             />
-            <n-input style="width: 120px" v-model:value="query.username" clearable />
+            <n-input
+              style="width: 120px"
+              v-model:value="query.username"
+              clearable
+            />
             <n-pagination
               v-model:page="query.page"
               :page-size="10"
               :item-count="count"
               simple
             />
-            <n-button secondary style="padding: 0 10px" title="刷新" @click="init">
+            <n-button
+              secondary
+              style="padding: 0 10px"
+              title="刷新"
+              @click="init"
+            >
               <Icon :width="16" icon="lucide:refresh-cw" />
             </n-button>
           </n-flex>
@@ -109,7 +121,9 @@ const data = ref<SubmissionOut[]>([])
 const count = ref(0)
 const query = reactive({
   page: Number(route.params.page),
-  username: (Array.isArray(route.query.username) ? "" : (route.query.username ?? "")) as string,
+  username: (Array.isArray(route.query.username)
+    ? ""
+    : (route.query.username ?? "")) as string,
   flag: null as string | null,
 })
 
@@ -145,7 +159,10 @@ const flagFilterOptions = computed(() => {
 })
 
 function handleFlagSelect(value: string | null) {
-  if (value === "_clear_all") { clearAllFlags(); return }
+  if (value === "_clear_all") {
+    clearAllFlags()
+    return
+  }
   query.flag = value
 }
 
@@ -216,10 +233,14 @@ const columns: DataTableColumn<SubmissionOut>[] = [
     render: (row) => {
       const myScore = row.my_score > 0 ? String(row.my_score) : "-"
       const avgScore = row.score > 0 ? row.score.toFixed(2) : "-"
-      return h("div", { style: { display: "flex", gap: "6px", alignItems: "baseline" } }, [
-        h("span", avgScore),
-        h("span", { style: { fontSize: "11px", color: "#999" } }, myScore),
-      ])
+      return h(
+        "div",
+        { style: { display: "flex", gap: "6px", alignItems: "baseline" } },
+        [
+          h("span", avgScore),
+          h("span", { style: { fontSize: "11px", color: "#999" } }, myScore),
+        ],
+      )
     },
   },
   {
@@ -251,7 +272,11 @@ async function handleExpand(keys: (string | number)[]) {
 async function handleDelete(row: SubmissionOut, parentId: string) {
   await Submission.delete(row.id)
   const items = expandedData.get(parentId)
-  if (items) expandedData.set(parentId, items.filter((d) => d.id !== row.id))
+  if (items)
+    expandedData.set(
+      parentId,
+      items.filter((d) => d.id !== row.id),
+    )
   if (submission.value.id === row.id) submission.value.id = ""
   const res = await Submission.list(query)
   data.value = res.items
@@ -292,7 +317,10 @@ async function handleNominateChild(row: SubmissionOut, parentId: string) {
   await Submission.nominate(row.id)
   const items = expandedData.get(parentId)
   if (items) {
-    expandedData.set(parentId, items.map((d) => ({ ...d, nominated: d.id === row.id })))
+    expandedData.set(
+      parentId,
+      items.map((d) => ({ ...d, nominated: d.id === row.id })),
+    )
   }
   data.value = data.value.map((d) => {
     if (d.username === user.username && d.task_id === row.task_id) {
@@ -316,18 +344,46 @@ function copyToEditor() {
   goHome(router, submission.value.task_type, submission.value.task_display)
 }
 
-watch(() => query.page, (v) => { init(); router.push({ params: { page: v } }) })
-watchDebounced(() => query.username, () => { query.page = 1; init() }, { debounce: 500, maxWait: 1000 })
-watch(() => query.flag, () => { query.page = 1; init() })
+watch(
+  () => query.page,
+  (v) => {
+    init()
+    router.push({ params: { page: v } })
+  },
+)
+watchDebounced(
+  () => query.username,
+  () => {
+    query.page = 1
+    init()
+  },
+  { debounce: 500, maxWait: 1000 },
+)
+watch(
+  () => query.flag,
+  () => {
+    query.page = 1
+    init()
+  },
+)
 
 onMounted(init)
 onUnmounted(() => {
   submission.value = {
-    id: "", userid: 0, username: "",
-    task_id: 0, task_display: 0, task_title: "",
+    id: "",
+    userid: 0,
+    username: "",
+    task_id: 0,
+    task_display: 0,
+    task_title: "",
     task_type: TASK_TYPE.Tutorial,
-    score: 0, my_score: 0, html: "", css: "", js: "",
-    created: new Date(), modified: new Date(),
+    score: 0,
+    my_score: 0,
+    html: "",
+    css: "",
+    js: "",
+    created: new Date(),
+    modified: new Date(),
   }
 })
 </script>
diff --git a/src/store/prompt.ts b/src/store/prompt.ts
index 99f4511..83a74cb 100644
--- a/src/store/prompt.ts
+++ b/src/store/prompt.ts
@@ -19,7 +19,13 @@ export const streaming = ref(false)
 export const historyLoading = ref(false)
 let _historyLoadId = 0
 export const streamingContent = ref("")
-let _onCodeComplete: ((code: { html: string | null; css: string | null; js: string | null }) => void) | null = null
+let _onCodeComplete:
+  | ((code: {
+      html: string | null
+      css: string | null
+      js: string | null
+    }) => void)
+  | null = null
 
 export function setOnCodeComplete(fn: typeof _onCodeComplete) {
   _onCodeComplete = fn
@@ -90,8 +96,8 @@ export function connectPrompt(taskId: number) {
 }
 
 export function disconnectPrompt() {
-  _historyLoadId++          // cancel any in-flight loadHistory
-  historyLoading.value = false  // reset here; finally block won't (loadId mismatch)
+  _historyLoadId++ // cancel any in-flight loadHistory
+  historyLoading.value = false // reset here; finally block won't (loadId mismatch)
   if (ws) {
     ws.close()
     ws = null
@@ -109,17 +115,27 @@ export async function loadHistory(taskId: number) {
   historyLoading.value = true
   try {
     const convs = await Prompt.listConversations(taskId)
-    console.log("[loadHistory] convs:", convs.map((c: any) => ({ id: c.id, is_active: c.is_active, message_count: c.message_count, username: c.username })), "user.username:", user.username)
-    if (loadId !== _historyLoadId) return  // navigated away, abort
+    console.log(
+      "[loadHistory] convs:",
+      convs.map((c: any) => ({
+        id: c.id,
+        is_active: c.is_active,
+        message_count: c.message_count,
+        username: c.username,
+      })),
+      "user.username:",
+      user.username,
+    )
+    if (loadId !== _historyLoadId) return // navigated away, abort
     const active = convs.find(
       (c: { is_active: boolean; message_count: number; username: string }) =>
-        c.is_active && c.message_count > 0 && c.username === user.username
+        c.is_active && c.message_count > 0 && c.username === user.username,
     )
     console.log("[loadHistory] active:", active)
     if (!active) return
     const raw: RawMessage[] = await Prompt.getMessages(active.id)
     console.log("[loadHistory] raw messages:", raw.length)
-    if (loadId !== _historyLoadId) return  // navigated away, abort
+    if (loadId !== _historyLoadId) return // navigated away, abort
     // Only apply if nothing has arrived via WebSocket yet
     if (messages.value.length > 0) return
     conversationId.value = active.id
@@ -157,7 +173,11 @@ export function newConversation() {
   ws.send(JSON.stringify({ type: "new_conversation" }))
 }
 
-function applyCode(code: { html: string | null; css: string | null; js: string | null }) {
+function applyCode(code: {
+  html: string | null
+  css: string | null
+  js: string | null
+}) {
   if (code.html !== null) html.value = code.html
   if (code.css !== null) css.value = code.css
   if (code.js !== null) js.value = code.js
diff --git a/src/utils/const.ts b/src/utils/const.ts
index 122ff25..b982721 100644
--- a/src/utils/const.ts
+++ b/src/utils/const.ts
@@ -39,7 +39,8 @@ export const ADMIN_URL = import.meta.env.PUBLIC_ADMIN_URL
 
 export const BASE_URL = import.meta.env.PUBLIC_BASE_URL
 
-export const WS_BASE_URL = import.meta.env.PUBLIC_WS_URL || `ws://${window.location.host}`
+export const WS_BASE_URL =
+  import.meta.env.PUBLIC_WS_URL || `ws://${window.location.host}`
 
 export enum TASK_TYPE {
   Tutorial = "tutorial",