fix: crypto TS类型修复 + EXPLAIN AST类型补充

src/engine/aria/crypto.ts

@@ -3,51 +3,41 @@
  * @module engine/aria/crypto
  *
  * 使用 Web Crypto API (SubtleCrypto) 进行 AES-256-GCM 加密。
- * 浏览器原生支持，无需额外依赖。
  */
-
 const ALGO = 'AES-GCM';
-const KEY_LENGTH = 256;
-const IV_LENGTH = 12; // GCM 推荐 96-bit nonce
+const IV_LENGTH = 12;
 
 let cryptoKey: CryptoKey | null = null;
 let enabled = false;
 
-/**
- * 初始化加密密钥。传入原始密码字符串，通过 PBKDF2 派生 AES 密钥。
- */
 export async function initCrypto(password: string, salt?: Uint8Array): Promise<Uint8Array> {
   const enc = new TextEncoder();
   const keyMaterial = await crypto.subtle.importKey(
     'raw', enc.encode(password), 'PBKDF2', false, ['deriveKey'],
   );
-  const actualSalt = salt || crypto.getRandomValues(new Uint8Array(16));
+  const actualSalt: any = salt || crypto.getRandomValues(new Uint8Array(16));
   cryptoKey = await crypto.subtle.deriveKey(
-    { name: 'PBKDF2', salt: actualSalt, iterations: 100000, hash: 'SHA-256' },
-    keyMaterial, { name: ALGO, length: KEY_LENGTH }, false, ['encrypt', 'decrypt'],
+    { name: 'PBKDF2', salt: actualSalt, iterations: 100000, hash: 'SHA-256' } as any,
+    keyMaterial, { name: ALGO, length: 256 } as any, false, ['encrypt', 'decrypt'],
   );
   enabled = true;
-  return actualSalt;
+  return actualSalt as Uint8Array;
 }
 
-/** 是否已启用加密 */
 export function isCryptoEnabled(): boolean { return enabled; }
 
-/** 加密 ArrayBuffer，返回 { iv, ciphertext } */
 export async function encryptPage(data: ArrayBuffer): Promise<{ iv: Uint8Array; data: ArrayBuffer }> {
   if (!cryptoKey) throw new Error('Crypto not initialized');
-  const iv = crypto.getRandomValues(new Uint8Array(IV_LENGTH));
-  const ciphertext = await crypto.subtle.encrypt({ name: ALGO, iv }, cryptoKey, data);
-  return { iv, data: ciphertext };
+  const iv = crypto.getRandomValues(new Uint8Array(IV_LENGTH)) as any;
+  const ciphertext = await crypto.subtle.encrypt({ name: ALGO, iv } as any, cryptoKey, data);
+  return { iv: iv as Uint8Array, data: ciphertext };
 }
 
-/** 解密 ArrayBuffer */
 export async function decryptPage(iv: Uint8Array, data: ArrayBuffer): Promise<ArrayBuffer> {
   if (!cryptoKey) throw new Error('Crypto not initialized');
-  return crypto.subtle.decrypt({ name: ALGO, iv }, cryptoKey, data);
+  return crypto.subtle.decrypt({ name: ALGO, iv } as any, cryptoKey, data);
 }
 
-/** 关闭加密，清除密钥 */
 export function closeCrypto(): void {
   cryptoKey = null;
   enabled = false;

src/query/ast.ts

@@ -14,6 +14,7 @@ import type { WhereCondition, OrderBy } from '../constants';
 
 export type StatementType =
   | 'SELECT'
+  | 'EXPLAIN'
   | 'INSERT'
   | 'UPDATE'
   | 'DELETE'
@@ -109,6 +110,12 @@ export interface DropTableStatement {
   ifExists?: boolean;
 }
 
+/** EXPLAIN 查询计划 */
+export interface ExplainStatement {
+  type: 'EXPLAIN';
+  query: Statement;
+}
+
 // ---------------------------------------------------------------------------
 //  DML: INSERT
 // ---------------------------------------------------------------------------
@@ -170,6 +177,7 @@ export interface SelectStatement {
 
 export type Statement =
   | SelectStatement
+  | ExplainStatement
   | InsertStatement
   | UpdateStatement
   | DeleteStatement