fix: add turso storage type to data migration import/export

The data migration import/export API was missing 'turso' as a storage
type check. Without this, Turso storage fell into the Redis 'else'
branch, which tries to use hSet/withRetry methods that don't exist
on the D1Storage adapter (used by Turso), causing user data import
to fail silently.

- Import route: added 'turso' alongside 'd1' to use
  createUserWithHashedPassword method
- Export route: added 'turso' alongside 'd1' to use
  getUserPasswordHash method

src/app/api/admin/data_migration/export/route.ts

@@ -249,8 +249,8 @@ async function getUserPasswordV2(username: string): Promise<string | null> {
       return null;
     }
 
-    // D1 存储：使用 getUserPasswordHash 方法
-    if (storageType === 'd1') {
+    // D1/Turso 存储：使用 getUserPasswordHash 方法
+    if (storageType === 'd1' || storageType === 'turso') {
       if (typeof storage.getUserPasswordHash === 'function') {
         return await storage.getUserPasswordHash(username);
       }

src/app/api/admin/data_migration/import/route.ts

@@ -180,8 +180,8 @@ export async function POST(req: NextRequest) {
             const createdAt = userV2?.created_at || Date.now();
 
             // 根据存储类型使用不同的导入方法
-            if (storageType === 'd1') {
-              // D1 存储：使用 createUserWithHashedPassword 方法
+            if (storageType === 'd1' || storageType === 'turso') {
+              // D1/Turso 存储：使用 createUserWithHashedPassword 方法
               if (typeof storage.createUserWithHashedPassword === 'function') {
                 await storage.createUserWithHashedPassword(
                   username,
@@ -193,9 +193,9 @@ export async function POST(req: NextRequest) {
                   userV2?.enabledApis,
                   userV2?.banned
                 );
-                console.log(`用户 ${username} 导入成功 (D1)`);
+                console.log(`用户 ${username} 导入成功 (${storageType})`);
               } else {
-                console.error(`D1 storage 缺少 createUserWithHashedPassword 方法`);
+                console.error(`${storageType} storage 缺少 createUserWithHashedPassword 方法`);
                 return false;
               }
             } else if (storageType === 'postgres') {