diff --git a/src/components/MessageLog.vue b/src/components/MessageLog.vue
index 8712866..1b8d61a 100644
--- a/src/components/MessageLog.vue
+++ b/src/components/MessageLog.vue
@@ -2,9 +2,7 @@
   <v-navigation-drawer v-model="drawer" location="right" temporary width="400">
     <v-toolbar color="primary">
       <v-toolbar-title>消息记录</v-toolbar-title>
-      <template #append>
-        <v-btn icon="mdi-delete" variant="text" @click="clearMessages" />
-      </template>
+
     </v-toolbar>
 
     <v-list>
@@ -21,14 +19,7 @@
           {{ new Date(msg.timestamp).toLocaleTimeString() }}
         </span>
 
-        <template #append>
-          <v-btn
-            icon="mdi-delete"
-            variant="text"
-            size="small"
-            @click="deleteMessage(msg.id)"
-          />
-        </template>
+
       </v-list-item>
 
       <v-list-item v-if="!messages.length">
diff --git a/src/components/settings/cards/DataProviderSettingsCard.vue b/src/components/settings/cards/DataProviderSettingsCard.vue
new file mode 100644
index 0000000..61c3bc6
--- /dev/null
+++ b/src/components/settings/cards/DataProviderSettingsCard.vue
@@ -0,0 +1,215 @@
+<template>
+  <settings-card
+    title="数据源设置"
+    icon="mdi-database-cog"
+  >
+    <v-list>
+      <!-- 服务器模式设置 -->
+      <template v-if="currentProvider === 'server'">
+        <v-list-item>
+          <template #prepend>
+            <v-icon icon="mdi-lan-connect" class="mr-3" />
+          </template>
+          <v-list-item-title>检查服务器连接</v-list-item-title>
+          <template #append>
+            <v-btn
+              :loading="loading"
+              variant="tonal"
+              size="small"
+              @click="checkServerConnection"
+            >
+              测试连接
+            </v-btn>
+          </template>
+        </v-list-item>
+      </template>
+
+      <!-- IndexedDB设置 -->
+      <template v-if="currentProvider === 'indexedDB'">
+        <v-list-item>
+          <template #prepend>
+            <v-icon icon="mdi-database" class="mr-3" />
+          </template>
+          <v-list-item-title>清除数据库缓存</v-list-item-title>
+          <v-list-item-subtitle>这将清除所有IndexedDB中的数据</v-list-item-subtitle>
+          <template #append>
+            <v-btn
+              color="error"
+              variant="tonal"
+              size="small"
+              @click="confirmClearIndexedDB"
+            >
+              清除
+            </v-btn>
+          </template>
+        </v-list-item>
+        <v-list-item>
+          <template #prepend>
+            <v-icon icon="mdi-database-export" class="mr-3" />
+          </template>
+          <v-list-item-title>导出数据库</v-list-item-title>
+          <template #append>
+            <v-btn
+              variant="tonal"
+              size="small"
+              @click="exportData"
+            >
+              导出
+            </v-btn>
+          </template>
+        </v-list-item>
+      </template>
+    </v-list>
+
+    <!-- 确认对话框 -->
+    <v-dialog v-model="confirmDialog" max-width="400">
+      <v-card>
+        <v-card-title>{{ confirmTitle }}</v-card-title>
+        <v-card-text>{{ confirmMessage }}</v-card-text>
+        <v-card-actions>
+          <v-spacer></v-spacer>
+          <v-btn color="grey" variant="text" @click="confirmDialog = false">取消</v-btn>
+          <v-btn color="error" variant="tonal" @click="handleConfirm">确认</v-btn>
+        </v-card-actions>
+      </v-card>
+    </v-dialog>
+  </settings-card>
+</template>
+
+<script>
+import SettingsCard from '@/components/SettingsCard.vue';
+import { getSetting } from '@/utils/settings';
+
+export default {
+  name: 'DataProviderSettingsCard',
+  components: { SettingsCard },
+
+  data() {
+    return {
+      loading: false,
+      confirmDialog: false,
+      confirmTitle: '',
+      confirmMessage: '',
+      confirmAction: null
+    };
+  },
+
+  computed: {
+    currentProvider() {
+      return getSetting('server.provider');
+    }
+  },
+
+  methods: {
+    async checkServerConnection() {
+      this.loading = true;
+      try {
+        const domain = getSetting('server.domain');
+        const response = await fetch(`${domain}`, {
+          method: 'GET',
+          headers: { 'Accept': 'application/json' }
+        });
+
+        if (response.ok) {
+          this.$message.success('连接成功', '服务器连接正常');
+        } else {
+          throw new Error('服务器响应异常');
+        }
+      } catch (error) {
+        this.$message.error('连接失败', error.message || '无法连接到服务器');
+      } finally {
+        this.loading = false;
+      }
+    },
+
+    confirmClearLocalStorage() {
+      this.confirmTitle = '确认清除';
+      this.confirmMessage = '此操作将清除所有本地存储的数据，确定要继续吗？';
+      this.confirmAction = this.clearLocalStorage;
+      this.confirmDialog = true;
+    },
+
+    clearLocalStorage() {
+      try {
+        localStorage.clear();
+        this.$message.success('清除成功', '本地存储数据已清除');
+        this.confirmDialog = false;
+      } catch (error) {
+        this.$message.error('清除失败', error.message);
+      }
+    },
+
+    confirmClearIndexedDB() {
+      this.confirmTitle = '确认清除';
+      this.confirmMessage = '此操作将清除所有IndexedDB中的数据，确定要继续吗？';
+      this.confirmAction = this.clearIndexedDB;
+      this.confirmDialog = true;
+    },
+
+    async clearIndexedDB() {
+      try {
+        const DBName = 'HomeworkDB';
+        // 删除整个数据库
+        await window.indexedDB.deleteDatabase(DBName);
+        this.$message.success('清除成功', '数据库缓存已清除');
+        this.confirmDialog = false;
+      } catch (error) {
+        this.$message.error('清除失败', error.message);
+      }
+    },
+
+    async exportData() {
+      try {
+        const DBName = 'HomeworkDB';
+        const data = { indexedDB: {} };
+
+        // 打开数据库
+        const db = await new Promise((resolve, reject) => {
+          const request = window.indexedDB.open(DBName);
+          request.onerror = () => reject(request.error);
+          request.onsuccess = () => resolve(request.result);
+        });
+
+        // 获取所有存储对象
+        const stores = Array.from(db.objectStoreNames);
+
+        // 导出每个存储对象的数据
+        for (const storeName of stores) {
+          const transaction = db.transaction(storeName, 'readonly');
+          const store = transaction.objectStore(storeName);
+
+          // 获取存储对象中的所有数据
+          const storeData = await new Promise((resolve, reject) => {
+            const request = store.getAll();
+            request.onerror = () => reject(request.error);
+            request.onsuccess = () => resolve(request.result);
+          });
+
+          data.indexedDB[storeName] = storeData;
+        }
+
+        // 创建并下载文件
+        const blob = new Blob([JSON.stringify(data, null, 2)], { type: 'application/json' });
+        const url = URL.createObjectURL(blob);
+        const a = document.createElement('a');
+        const timestamp = new Date().toISOString().split('T')[0];
+        a.href = url;
+        a.download = `homework-indexeddb-${timestamp}.json`;
+        a.click();
+        URL.revokeObjectURL(url);
+
+        this.$message.success('导出成功', 'IndexedDB数据已导出');
+      } catch (error) {
+        console.error('导出失败:', error);
+        this.$message.error('导出失败', error.message || '无法导出数据库数据');
+      }
+    },
+
+    handleConfirm() {
+      if (this.confirmAction) {
+        this.confirmAction();
+      }
+    }
+  }
+};
+</script>
diff --git a/src/pages/guide.vue b/src/pages/guide.vue
new file mode 100644
index 0000000..e69de29
diff --git a/src/pages/index.vue b/src/pages/index.vue
index 434c019..b09fa58 100644
--- a/src/pages/index.vue
+++ b/src/pages/index.vue
@@ -627,6 +627,7 @@ export default {
           if (response.error.code === "NOT_FOUND") {
             this.state.showNoDataMessage = true;
             this.state.noDataMessage = response.error.message;
+            // 确保数据结构完整
             this.state.boardData = {
               homework: {},
               attendance: { absent: [], late: [], exclude: [] },
@@ -635,12 +636,25 @@ export default {
             throw new Error(response.error.message);
           }
         } else {
-          this.state.boardData = response.data;
+          // 确保数据结构完整
+          this.state.boardData = {
+            homework: response.data.homework || {},
+            attendance: {
+              absent: response.data.attendance?.absent || [],
+              late: response.data.attendance?.late || [],
+              exclude: response.data.attendance?.exclude || [],
+            },
+          };
           this.state.synced = true;
           this.state.showNoDataMessage = false;
           this.$message.success("下载成功", "数据已更新");
         }
       } catch (error) {
+        // 发生错误时也要确保数据结构完整
+        this.state.boardData = {
+          homework: {},
+          attendance: { absent: [], late: [], exclude: [] },
+        };
         this.$message.error("下载失败", error.message);
       } finally {
         this.loading.download = false;
diff --git a/src/pages/settings.vue b/src/pages/settings.vue
index d12a8c6..e7e9526 100644
--- a/src/pages/settings.vue
+++ b/src/pages/settings.vue
@@ -15,26 +15,32 @@
       <v-row>
         <v-col cols="12" md="6">
           <server-settings-card
+          border
             :loading="loading.server"
             @saved="onSettingsSaved"
           />
         </v-col>
 
         <v-col cols="12" md="6">
-          <edit-settings-card @saved="onSettingsSaved" />
+          <data-provider-settings-card border />
         </v-col>
 
         <v-col cols="12" md="6">
-          <refresh-settings-card @saved="onSettingsSaved" />
+          <edit-settings-card @saved="onSettingsSaved" border/>
         </v-col>
 
         <v-col cols="12" md="6">
-          <display-settings-card @saved="onSettingsSaved" />
+          <refresh-settings-card @saved="onSettingsSaved" border/>
+        </v-col>
+
+        <v-col cols="12" md="6">
+          <display-settings-card @saved="onSettingsSaved" border/>
         </v-col>
 
         <!-- 开发者选项卡片 -->
         <v-col :cols="12" :md="settings.developer.enabled ? 12 : 6">
           <settings-card
+          border
             title="开发者选项"
             icon="mdi-developer-board"
           >
@@ -139,6 +145,7 @@ import ServerSettingsCard from '@/components/settings/cards/ServerSettingsCard.v
 import EditSettingsCard from '@/components/settings/cards/EditSettingsCard.vue';
 import RefreshSettingsCard from '@/components/settings/cards/RefreshSettingsCard.vue';
 import DisplaySettingsCard from '@/components/settings/cards/DisplaySettingsCard.vue';
+import DataProviderSettingsCard from '@/components/settings/cards/DataProviderSettingsCard.vue';
 import {
   getSetting,
   setSetting,
@@ -162,7 +169,8 @@ export default {
     MessageLog,
     SettingsCard,
     StudentListCard,
-    AboutCard
+    AboutCard,
+    DataProviderSettingsCard
   },
   setup() {
     const { mobile } = useDisplay();