refactor: move server-agent to agents directory

- Create src/agents/ directory for agent modules
- Move server-agent.ts to new location
- Update import paths in all dependent files:
  - openai-service.ts
  - tools/server-tool.ts
  - routes/handlers/message-handler.ts
  - routes/api/chat.ts

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

src/agents/server-agent.ts

@@ -9,11 +9,11 @@
  * - Brave Search / Context7 도구로 최신 트렌드 반영
  */
 
-import type { Env, ServerSession, BandwidthInfo, RecommendResponse } from './types';
-import { createLogger } from './utils/logger';
-import { executeSearchWeb, executeLookupDocs } from './tools/search-tool';
-import { formatTrafficInfo } from './utils/formatters';
-import { SERVER_CONSULTATION_STATUS, LANGUAGE_CODE } from './constants';
+import type { Env, ServerSession, BandwidthInfo, RecommendResponse } from '../types';
+import { createLogger } from '../utils/logger';
+import { executeSearchWeb, executeLookupDocs } from '../tools/search-tool';
+import { formatTrafficInfo } from '../utils/formatters';
+import { SERVER_CONSULTATION_STATUS, LANGUAGE_CODE } from '../constants';
 
 const logger = createLogger('server-agent');
 
@@ -362,7 +362,7 @@ async function callServerExpertAI(
     throw new Error('OPENAI_API_KEY not configured');
   }
 
-  const { getOpenAIUrl } = await import('./utils/api-urls');
+  const { getOpenAIUrl } = await import('../utils/api-urls');
 
   // Build conversation history
   const conversationHistory = session.messages.map(m => ({
@@ -819,7 +819,7 @@ export async function processServerConsultation(
       // 1. Call recommendation API (추천 먼저 받기)
       logger.info('추천 API 호출', { collectedInfo: session.collectedInfo });
 
-      const { executeServerAction, getRecommendationData } = await import('./tools/server-tool');
+      const { executeServerAction, getRecommendationData } = await import('../tools/server-tool');
 
       // 전체 메시지 내용 (tech stack 추출 및 리전 추출에 재사용)
       const allMessages = session.messages.map(m => m.content).join(' ');

src/openai-service.ts

@@ -6,7 +6,7 @@ import { createLogger } from './utils/logger';
 import { metrics } from './utils/metrics';
 import { getOpenAIUrl } from './utils/api-urls';
 import { ERROR_MESSAGES } from './constants/messages';
-import { getServerSession, processServerConsultation } from './server-agent';
+import { getServerSession, processServerConsultation } from './agents/server-agent';
 import { getTroubleshootSession, processTroubleshoot } from './troubleshoot-agent';
 import { sendMessage } from './telegram';
 

src/routes/api/chat.ts

@@ -331,7 +331,7 @@ async function handleChatApi(request: Request, env: Env): Promise<Response> {
           const orderData = JSON.parse(orderSessionData);
 
           // 1. 서버 세션에서 가격 정보 가져오기
-          const { getServerSession, deleteServerSession } = await import('../../server-agent');
+          const { getServerSession, deleteServerSession } = await import('../../agents/server-agent');
           const session = await getServerSession(env.DB, telegramUserId);
 
           if (!session || !session.lastRecommendation) {

src/routes/handlers/message-handler.ts

@@ -121,7 +121,7 @@ export async function handleMessage(
           const orderData = JSON.parse(orderSessionData);
 
           // 1. 서버 세션에서 가격 정보 가져오기
-          const { getServerSession, deleteServerSession } = await import('../../server-agent');
+          const { getServerSession, deleteServerSession } = await import('../../agents/server-agent');
           const session = await getServerSession(env.DB, telegramUserId);
 
           if (!session || !session.lastRecommendation) {

src/tools/server-tool.ts

@@ -664,7 +664,7 @@ export async function executeServerAction(
   switch (action) {
     case 'start_consultation': {
       // Import session functions
-      const { saveServerSession } = await import('../server-agent');
+      const { saveServerSession } = await import('../agents/server-agent');
 
       if (!telegramUserId) {
         return '🚫 사용자 인증이 필요합니다.';
@@ -691,7 +691,7 @@ export async function executeServerAction(
     }
 
     case 'continue_consultation': {
-      const { getServerSession, processServerConsultation } = await import('../server-agent');
+      const { getServerSession, processServerConsultation } = await import('../agents/server-agent');
 
       if (!telegramUserId) {
         return '🚫 사용자 인증이 필요합니다.';
@@ -715,7 +715,7 @@ export async function executeServerAction(
     }
 
     case 'cancel_consultation': {
-      const { deleteServerSession } = await import('../server-agent');
+      const { deleteServerSession } = await import('../agents/server-agent');
 
       if (!telegramUserId) {
         return '🚫 사용자 인증이 필요합니다.';
@@ -771,7 +771,7 @@ export async function executeServerAction(
       // 세션에 추천 결과 저장 (선택 기능 활성화)
       if (telegramUserId && env?.DB && recommendationData.recommendations && recommendationData.recommendations.length > 0) {
         try {
-          const { getServerSession, saveServerSession } = await import('../server-agent');
+          const { getServerSession, saveServerSession } = await import('../agents/server-agent');
 
           // 기존 세션 조회 또는 새로 생성
           let session = await getServerSession(env.DB, telegramUserId);