feat: add domain tool execution dispatcher

- Add executeDomainToolCall function
- Integrate with existing domain-tool.ts functions
- Map AI tool calls to domain actions

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/agents/domain-agent.ts

@@ -10,6 +10,7 @@
 
 import type { Env, DomainSession, DomainSessionStatus } from '../types';
 import { createLogger } from '../utils/logger';
+import { executeDomainAction, executeSuggestDomains } from '../tools/domain-tool';
 
 const logger = createLogger('domain-agent');
 
@@ -463,6 +464,120 @@ ${JSON.stringify(session.collected_info, null, 2)}
   }
 }
 
+/**
+ * 도메인 도구 실행 디스패처
+ *
+ * Domain Agent AI가 호출한 tool을 실제 domain-tool.ts 함수로 매핑
+ *
+ * @param toolName - 도구 이름
+ * @param args - 도구 인자
+ * @param env - Environment
+ * @param userId - Telegram User ID
+ * @param db - D1 Database
+ * @returns 도구 실행 결과 (텍스트)
+ */
+export async function executeDomainToolCall(
+  toolName: string,
+  args: Record<string, unknown>,
+  env: Env,
+  userId: string,
+  db: D1Database
+): Promise<string> {
+  logger.info('도메인 도구 실행', { toolName, args });
+
+  // 사용자 소유 도메인 조회 (권한 검증용)
+  let allowedDomains: string[] = [];
+  let userIdNum: number | undefined;
+
+  try {
+    const user = await db.prepare(
+      'SELECT id FROM users WHERE telegram_id = ?'
+    ).bind(userId).first<{ id: number }>();
+
+    if (user) {
+      userIdNum = user.id;
+      const domains = await db.prepare(
+        'SELECT domain FROM user_domains WHERE user_id = ? AND verified = 1'
+      ).bind(user.id).all<{ domain: string }>();
+      allowedDomains = domains.results?.map(d => d.domain) || [];
+      logger.info('소유 도메인 조회', { userDomains: allowedDomains });
+    }
+  } catch (error) {
+    logger.error('도메인 권한 조회 실패', error as Error, { userId });
+    // 계속 진행 (읽기 작업은 가능)
+  }
+
+  switch (toolName) {
+    case 'check_domain':
+      return executeDomainAction(
+        'check',
+        { domain: args.domain as string },
+        allowedDomains,
+        env,
+        userId,
+        db,
+        userIdNum
+      );
+
+    case 'search_suggestions':
+      return executeSuggestDomains(
+        { keywords: args.keywords as string },
+        env
+      );
+
+    case 'get_whois':
+      return executeDomainAction(
+        'whois',
+        { domain: args.domain as string },
+        allowedDomains,
+        env,
+        userId,
+        db,
+        userIdNum
+      );
+
+    case 'get_price':
+      return executeDomainAction(
+        'price',
+        { tld: args.tld as string },
+        allowedDomains,
+        env,
+        userId,
+        db,
+        userIdNum
+      );
+
+    case 'register_domain':
+      return executeDomainAction(
+        'register',
+        { domain: args.domain as string },
+        allowedDomains,
+        env,
+        userId,
+        db,
+        userIdNum
+      );
+
+    case 'set_nameservers':
+      return executeDomainAction(
+        'set_ns',
+        {
+          domain: args.domain as string,
+          nameservers: args.nameservers as string[]
+        },
+        allowedDomains,
+        env,
+        userId,
+        db,
+        userIdNum
+      );
+
+    default:
+      logger.warn('알 수 없는 도메인 도구', { toolName });
+      return `❌ 알 수 없는 도구: ${toolName}`;
+  }
+}
+
 /**
  * 도메인 추천 상담 처리 (메인 함수)
  *