diff --git a/src/app/api/admin/category/route.ts b/src/app/api/admin/category/route.ts
index 19df5c7..6a0f99a 100644
--- a/src/app/api/admin/category/route.ts
+++ b/src/app/api/admin/category/route.ts
@@ -4,7 +4,7 @@ import { NextRequest, NextResponse } from 'next/server';
 
 import { getAuthInfoFromCookie } from '@/lib/auth';
 import { getConfig } from '@/lib/config';
-import { getStorage } from '@/lib/db';
+import { db } from '@/lib/db';
 import { IStorage } from '@/lib/types';
 
 export const runtime = 'edge';
@@ -45,7 +45,6 @@ export async function POST(request: NextRequest) {
 
     // 获取配置与存储
     const adminConfig = await getConfig();
-    const storage: IStorage | null = getStorage();
 
     // 权限与身份校验
     if (username !== process.env.USERNAME) {
@@ -176,9 +175,7 @@ export async function POST(request: NextRequest) {
     }
 
     // 持久化到存储
-    if (storage && typeof (storage as any).setAdminConfig === 'function') {
-      await (storage as any).setAdminConfig(adminConfig);
-    }
+    await db.saveAdminConfig(adminConfig);
 
     return NextResponse.json(
       { ok: true },
diff --git a/src/app/api/admin/config_file/route.ts b/src/app/api/admin/config_file/route.ts
index a5989b6..42514d3 100644
--- a/src/app/api/admin/config_file/route.ts
+++ b/src/app/api/admin/config_file/route.ts
@@ -4,7 +4,7 @@ import { NextRequest, NextResponse } from 'next/server';
 
 import { getAuthInfoFromCookie } from '@/lib/auth';
 import { getConfig, refineConfig } from '@/lib/config';
-import { getStorage } from '@/lib/db';
+import { db } from '@/lib/db';
 
 export async function POST(request: NextRequest) {
   const storageType = process.env.NEXT_PUBLIC_STORAGE_TYPE || 'localstorage';
@@ -26,7 +26,6 @@ export async function POST(request: NextRequest) {
   try {
     // 检查用户权限
     let adminConfig = await getConfig();
-    const storage = getStorage();
 
     // 仅站长可以修改配置文件
     if (username !== process.env.USERNAME) {
@@ -77,19 +76,11 @@ export async function POST(request: NextRequest) {
 
     adminConfig = refineConfig(adminConfig);
     // 更新配置文件
-    if (storage && typeof (storage as any).setAdminConfig === 'function') {
-      await (storage as any).setAdminConfig(adminConfig);
-
-      return NextResponse.json({
-        success: true,
-        message: '配置文件更新成功',
-      });
-    } else {
-      return NextResponse.json(
-        { error: '存储服务不可用' },
-        { status: 500 }
-      );
-    }
+    await db.saveAdminConfig(adminConfig);
+    return NextResponse.json({
+      success: true,
+      message: '配置文件更新成功',
+    });
   } catch (error) {
     console.error('更新配置文件失败:', error);
     return NextResponse.json(
diff --git a/src/app/api/admin/data_migration/import/route.ts b/src/app/api/admin/data_migration/import/route.ts
index 6c6d279..4b13195 100644
--- a/src/app/api/admin/data_migration/import/route.ts
+++ b/src/app/api/admin/data_migration/import/route.ts
@@ -7,6 +7,7 @@ import { gunzip } from 'zlib';
 import { getAuthInfoFromCookie } from '@/lib/auth';
 import { SimpleCrypto } from '@/lib/crypto';
 import { db } from '@/lib/db';
+import { setCachedConfig } from '@/lib/config';
 
 const gunzipAsync = promisify(gunzip);
 
@@ -79,6 +80,7 @@ export async function POST(req: NextRequest) {
 
     // 导入管理员配置
     await db.saveAdminConfig(importData.data.adminConfig);
+    await setCachedConfig(importData.data.adminConfig);
 
     // 导入用户数据
     const userData = importData.data.userData;
diff --git a/src/app/api/admin/site/route.ts b/src/app/api/admin/site/route.ts
index 979608e..a198350 100644
--- a/src/app/api/admin/site/route.ts
+++ b/src/app/api/admin/site/route.ts
@@ -4,7 +4,7 @@ import { NextRequest, NextResponse } from 'next/server';
 
 import { getAuthInfoFromCookie } from '@/lib/auth';
 import { getConfig } from '@/lib/config';
-import { getStorage } from '@/lib/db';
+import { db } from '@/lib/db';
 
 export const runtime = 'edge';
 
@@ -66,7 +66,6 @@ export async function POST(request: NextRequest) {
     }
 
     const adminConfig = await getConfig();
-    const storage = getStorage();
 
     // 权限校验
     if (username !== process.env.USERNAME) {
@@ -93,9 +92,7 @@ export async function POST(request: NextRequest) {
     };
 
     // 写入数据库
-    if (storage && typeof (storage as any).setAdminConfig === 'function') {
-      await (storage as any).setAdminConfig(adminConfig);
-    }
+    await db.saveAdminConfig(adminConfig);
 
     return NextResponse.json(
       { ok: true },
diff --git a/src/app/api/admin/source/route.ts b/src/app/api/admin/source/route.ts
index e77b841..a2662e1 100644
--- a/src/app/api/admin/source/route.ts
+++ b/src/app/api/admin/source/route.ts
@@ -4,7 +4,7 @@ import { NextRequest, NextResponse } from 'next/server';
 
 import { getAuthInfoFromCookie } from '@/lib/auth';
 import { getConfig } from '@/lib/config';
-import { getStorage } from '@/lib/db';
+import { db } from '@/lib/db';
 import { IStorage } from '@/lib/types';
 
 export const runtime = 'edge';
@@ -45,7 +45,6 @@ export async function POST(request: NextRequest) {
 
     // 获取配置与存储
     const adminConfig = await getConfig();
-    const storage: IStorage | null = getStorage();
 
     // 权限与身份校验
     if (username !== process.env.USERNAME) {
@@ -144,9 +143,7 @@ export async function POST(request: NextRequest) {
     }
 
     // 持久化到存储
-    if (storage && typeof (storage as any).setAdminConfig === 'function') {
-      await (storage as any).setAdminConfig(adminConfig);
-    }
+    await db.saveAdminConfig(adminConfig);
 
     return NextResponse.json(
       { ok: true },
diff --git a/src/app/api/admin/user/route.ts b/src/app/api/admin/user/route.ts
index 7eb5ba5..c108c13 100644
--- a/src/app/api/admin/user/route.ts
+++ b/src/app/api/admin/user/route.ts
@@ -4,8 +4,7 @@ import { NextRequest, NextResponse } from 'next/server';
 
 import { getAuthInfoFromCookie } from '@/lib/auth';
 import { getConfig } from '@/lib/config';
-import { getStorage } from '@/lib/db';
-import { IStorage } from '@/lib/types';
+import { db } from '@/lib/db';
 
 export const runtime = 'edge';
 
@@ -75,7 +74,6 @@ export async function POST(request: NextRequest) {
 
     // 获取配置与存储
     const adminConfig = await getConfig();
-    const storage: IStorage | null = getStorage();
 
     // 判定操作者角色
     let operatorRole: 'owner' | 'admin';
@@ -125,13 +123,7 @@ export async function POST(request: NextRequest) {
               { status: 400 }
             );
           }
-          if (!storage || typeof storage.registerUser !== 'function') {
-            return NextResponse.json(
-              { error: '存储未配置用户注册' },
-              { status: 500 }
-            );
-          }
-          await storage.registerUser(targetUsername!, targetPassword);
+          await db.registerUser(targetUsername!, targetPassword);
           // 更新配置
           adminConfig.UserConfig.Users.push({
             username: targetUsername!,
@@ -139,7 +131,7 @@ export async function POST(request: NextRequest) {
           });
           targetEntry =
             adminConfig.UserConfig.Users[
-              adminConfig.UserConfig.Users.length - 1
+            adminConfig.UserConfig.Users.length - 1
             ];
           break;
         }
@@ -254,14 +246,7 @@ export async function POST(request: NextRequest) {
             );
           }
 
-          if (!storage || typeof storage.changePassword !== 'function') {
-            return NextResponse.json(
-              { error: '存储未配置密码修改功能' },
-              { status: 500 }
-            );
-          }
-
-          await storage.changePassword(targetUsername!, targetPassword);
+          await db.changePassword(targetUsername!, targetPassword);
           break;
         }
         case 'deleteUser': {
@@ -287,14 +272,7 @@ export async function POST(request: NextRequest) {
             );
           }
 
-          if (!storage || typeof storage.deleteUser !== 'function') {
-            return NextResponse.json(
-              { error: '存储未配置用户删除功能' },
-              { status: 500 }
-            );
-          }
-
-          await storage.deleteUser(targetUsername!);
+          await db.deleteUser(targetUsername!);
 
           // 从配置中移除用户
           const userIndex = adminConfig.UserConfig.Users.findIndex(
@@ -312,9 +290,7 @@ export async function POST(request: NextRequest) {
     }
 
     // 将更新后的配置写入数据库
-    if (storage && typeof (storage as any).setAdminConfig === 'function') {
-      await (storage as any).setAdminConfig(adminConfig);
-    }
+    await db.saveAdminConfig(adminConfig);
 
     return NextResponse.json(
       { ok: true },
diff --git a/src/app/api/change-password/route.ts b/src/app/api/change-password/route.ts
index 66d3174..57bf525 100644
--- a/src/app/api/change-password/route.ts
+++ b/src/app/api/change-password/route.ts
@@ -3,7 +3,7 @@
 import { NextRequest, NextResponse } from 'next/server';
 
 import { getAuthInfoFromCookie } from '@/lib/auth';
-import { getStorage } from '@/lib/db';
+import { db } from '@/lib/db';
 import { IStorage } from '@/lib/types';
 
 export const runtime = 'edge';
@@ -46,17 +46,8 @@ export async function POST(request: NextRequest) {
       );
     }
 
-    // 获取存储实例
-    const storage: IStorage | null = getStorage();
-    if (!storage || typeof storage.changePassword !== 'function') {
-      return NextResponse.json(
-        { error: '存储服务不支持修改密码' },
-        { status: 500 }
-      );
-    }
-
     // 修改密码
-    await storage.changePassword(username, newPassword);
+    await db.changePassword(username, newPassword);
 
     return NextResponse.json({ ok: true });
   } catch (error) {
diff --git a/src/app/api/cron/route.ts b/src/app/api/cron/route.ts
index a65bb19..e41b7b1 100644
--- a/src/app/api/cron/route.ts
+++ b/src/app/api/cron/route.ts
@@ -3,7 +3,7 @@
 import { NextRequest, NextResponse } from 'next/server';
 
 import { getConfig, refineConfig } from '@/lib/config';
-import { db, getStorage } from '@/lib/db';
+import { db } from '@/lib/db';
 import { fetchVideoDetail } from '@/lib/fetchVideoDetail';
 import { SearchResult } from '@/lib/types';
 
@@ -72,10 +72,7 @@ async function refreshConfig() {
       config.ConfigFile = decodedContent;
       config.ConfigSubscribtion.LastCheck = new Date().toISOString();
       config = refineConfig(config);
-      const storage = getStorage();
-      if (storage && typeof (storage as any).setAdminConfig === 'function') {
-        await (storage as any).setAdminConfig(config);
-      }
+      await db.saveAdminConfig(config);
     } catch (e) {
       console.error('刷新配置失败:', e);
     }
diff --git a/src/lib/config.ts b/src/lib/config.ts
index 2e434dd..64391dc 100644
--- a/src/lib/config.ts
+++ b/src/lib/config.ts
@@ -1,6 +1,6 @@
 /* eslint-disable @typescript-eslint/no-explicit-any, no-console, @typescript-eslint/no-non-null-assertion */
 
-import { getStorage } from '@/lib/db';
+import { db } from '@/lib/db';
 
 import { AdminConfig } from './admin.types';
 
@@ -178,14 +178,11 @@ async function getInitConfig(configFile: string, subConfig: {
   };
 
   // 补充用户信息
-  const storage = getStorage();
   let userNames: string[] = [];
-  if (storage && typeof (storage as any).getAllUsers === 'function') {
-    try {
-      userNames = await (storage as any).getAllUsers();
-    } catch (e) {
-      console.error('获取用户列表失败:', e);
-    }
+  try {
+    userNames = await db.getAllUsers();
+  } catch (e) {
+    console.error('获取用户列表失败:', e);
   }
   const allUsers = userNames.filter((u) => u !== process.env.USERNAME).map((u) => ({
     username: u,
@@ -232,10 +229,11 @@ export async function getConfig(): Promise<AdminConfig> {
   }
 
   // 读 db
-  const storage = getStorage();
   let adminConfig: AdminConfig | null = null;
-  if (storage && typeof (storage as any).getAdminConfig === 'function') {
-    adminConfig = await (storage as any).getAdminConfig();
+  try {
+    adminConfig = await db.getAdminConfig();
+  } catch (e) {
+    console.error('获取管理员配置失败:', e);
   }
 
   // db 中无配置，执行一次初始化
@@ -247,20 +245,20 @@ export async function getConfig(): Promise<AdminConfig> {
 }
 
 export async function resetConfig() {
-  let originConfig: AdminConfig;
-  const storage = getStorage();
-  if (storage && typeof (storage as any).getAdminConfig === 'function') {
-    originConfig = await (storage as any).getAdminConfig();
-  } else {
+  let originConfig: AdminConfig | null = null;
+  try {
+    originConfig = await db.getAdminConfig();
+  } catch (e) {
+    console.error('获取管理员配置失败:', e);
+  }
+  if (!originConfig) {
     originConfig = {} as AdminConfig;
   }
   const adminConfig = await getInitConfig(originConfig.ConfigFile, originConfig.ConfigSubscribtion);
-    cachedConfig = adminConfig;
-    if (storage && typeof (storage as any).setAdminConfig === 'function') {
-      await (storage as any).setAdminConfig(adminConfig);
-    }
+  cachedConfig = adminConfig;
+  await db.saveAdminConfig(adminConfig);
 
-    return;
+  return;
 }
 
 export async function getCacheTime(): Promise<number> {
@@ -277,3 +275,7 @@ export async function getAvailableApiSites(): Promise<ApiSite[]> {
     detail: s.detail,
   }));
 }
+
+export async function setCachedConfig(config: AdminConfig) {
+  cachedConfig = config;
+}
\ No newline at end of file
diff --git a/src/lib/db.ts b/src/lib/db.ts
index 2622917..d12bac2 100644
--- a/src/lib/db.ts
+++ b/src/lib/db.ts
@@ -29,7 +29,7 @@ function createStorage(): IStorage {
 // 单例存储实例
 let storageInstance: IStorage | null = null;
 
-export function getStorage(): IStorage {
+function getStorage(): IStorage {
   if (!storageInstance) {
     storageInstance = createStorage();
   }
@@ -142,6 +142,14 @@ export class DbManager {
     return this.storage.checkUserExist(userName);
   }
 
+  async changePassword(userName: string, newPassword: string): Promise<void> {
+    await this.storage.changePassword(userName, newPassword);
+  }
+
+  async deleteUser(userName: string): Promise<void> {
+    await this.storage.deleteUser(userName);
+  }
+
   // ---------- 搜索历史 ----------
   async getSearchHistory(userName: string): Promise<string[]> {
     return this.storage.getSearchHistory(userName);