feat: add server selection and order flow after recommendation

- Add 'selecting' and 'ordering' status to ServerSession
- Add lastRecommendation field to store recommendation results
- Keep session alive after recommendation (don't delete immediately)
- Add selection pattern matching (1번, 첫번째, 1번 선택 등)
- Add order confirmation message with inline buttons
- Add server_order/server_cancel callback handlers
- Add ServerOrderKeyboardData type for button data

Flow: recommend → select number → confirm with buttons → order/cancel

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

src/routes/handlers/callback-handler.ts

@@ -119,6 +119,122 @@ ${result.error}
     return;
   }
 
+  // 서버 주문 확인
+  if (data.startsWith('server_order:')) {
+    const parts = data.split(':');
+    if (parts.length !== 3) {
+      await answerCallbackQuery(env.BOT_TOKEN, queryId, { text: '잘못된 데이터입니다.' });
+      return;
+    }
+
+    const userId = parts[1];
+    const index = parseInt(parts[2], 10);
+
+    if (isNaN(index) || index < 0 || index > 2) {
+      await answerCallbackQuery(env.BOT_TOKEN, queryId, { text: '잘못된 선택입니다.' });
+      return;
+    }
+
+    await answerCallbackQuery(env.BOT_TOKEN, queryId, { text: '처리 중...' });
+    await editMessageText(
+      env.BOT_TOKEN,
+      chatId,
+      messageId,
+      '⏳ 서버 주문 처리 중...'
+    );
+
+    // 세션 조회
+    const { getServerSession, deleteServerSession } = await import('../../server-agent');
+
+    if (!env.SESSION_KV) {
+      await editMessageText(
+        env.BOT_TOKEN,
+        chatId,
+        messageId,
+        '❌ 세션 저장소가 설정되지 않았습니다.'
+      );
+      return;
+    }
+
+    const session = await getServerSession(env.SESSION_KV, userId);
+
+    if (!session || !session.lastRecommendation) {
+      await editMessageText(
+        env.BOT_TOKEN,
+        chatId,
+        messageId,
+        '❌ 세션이 만료되었습니다.\n다시 "서버 추천"을 시작해주세요.'
+      );
+      return;
+    }
+
+    const selected = session.lastRecommendation.recommendations[index];
+
+    if (!selected) {
+      await editMessageText(
+        env.BOT_TOKEN,
+        chatId,
+        messageId,
+        '❌ 선택한 서버를 찾을 수 없습니다.'
+      );
+      await deleteServerSession(env.SESSION_KV, userId);
+      return;
+    }
+
+    // 주문 처리 (현재는 준비 중)
+    const { executeServerAction } = await import('../../tools/server-tool');
+
+    const result = await executeServerAction(
+      'order',
+      {
+        server_id: selected.plan_name, // 임시
+        region_code: selected.region.code,
+        label: `${session.collectedInfo.useCase || 'server'}-1`
+      },
+      env,
+      userId
+    );
+
+    await editMessageText(
+      env.BOT_TOKEN,
+      chatId,
+      messageId,
+      `📋 ${selected.plan_name} 신청\n\n${result}`
+    );
+
+    // 세션 삭제
+    await deleteServerSession(env.SESSION_KV, userId);
+    return;
+  }
+
+  // 서버 주문 취소
+  if (data.startsWith('server_cancel:')) {
+    const parts = data.split(':');
+    if (parts.length !== 2) {
+      await answerCallbackQuery(env.BOT_TOKEN, queryId, { text: '잘못된 데이터입니다.' });
+      return;
+    }
+
+    const userId = parts[1];
+
+    await answerCallbackQuery(env.BOT_TOKEN, queryId, { text: '취소되었습니다.' });
+    await editMessageText(
+      env.BOT_TOKEN,
+      chatId,
+      messageId,
+      '❌ 서버 신청이 취소되었습니다.'
+    );
+
+    // 세션 삭제
+    const { deleteServerSession } = await import('../../server-agent');
+
+    if (env.SESSION_KV) {
+      await deleteServerSession(env.SESSION_KV, userId);
+    }
+
+    return;
+  }
+
   // 알 수 없는 callback data
   await answerCallbackQuery(env.BOT_TOKEN, queryId);
 }

src/routes/handlers/message-handler.ts

@@ -100,6 +100,17 @@ export async function handleMessage(
             { text: '❌ 취소', callback_data: 'domain_cancel' }
           ]
         ]);
+      } else if (result.keyboardData.type === 'server_order') {
+        const { userId, index } = result.keyboardData;
+        const confirmData = `server_order:${userId}:${index}`;
+        const cancelData = `server_cancel:${userId}`;
+
+        await sendMessageWithKeyboard(env.BOT_TOKEN, chatId, finalResponse, [
+          [
+            { text: '✅ 신청하기', callback_data: confirmData },
+            { text: '❌ 취소', callback_data: cancelData }
+          ]
+        ]);
       } else {
         // TypeScript exhaustiveness check - should never reach here
         console.warn('[Webhook] Unknown keyboard type:', (result.keyboardData as { type: string }).type);

src/server-agent.ts

@@ -5,6 +5,7 @@
  * - 대화형 서버 추천 상담
  * - 세션 기반 정보 수집
  * - 충분한 정보 수집 시 자동 추천
+ * - 추천 후 사용자 선택 및 주문 흐름
  * - Brave Search / Context7 도구로 최신 트렌드 반영
  */
 
@@ -390,6 +391,56 @@ export async function processServerConsultation(
       status: session.status
     });
 
+    // 선택 단계 처리
+    if (session.status === 'selecting' && session.lastRecommendation) {
+      const selectionMatch = userMessage.match(/(\d+)(?:번|번째)?|첫\s*번째|두\s*번째|세\s*번째/);
+
+      if (selectionMatch) {
+        let selectedIndex = -1;
+
+        // 숫자 추출
+        if (selectionMatch[1]) {
+          selectedIndex = parseInt(selectionMatch[1], 10) - 1;
+        } else if (userMessage.includes('첫')) {
+          selectedIndex = 0;
+        } else if (userMessage.includes('두')) {
+          selectedIndex = 1;
+        } else if (userMessage.includes('세')) {
+          selectedIndex = 2;
+        }
+
+        // 유효성 검증
+        if (selectedIndex >= 0 && selectedIndex < session.lastRecommendation.recommendations.length) {
+          const selected = session.lastRecommendation.recommendations[selectedIndex];
+
+          // Mark session as ordering
+          session.status = 'ordering';
+          await saveServerSession(env.SESSION_KV, session.telegramUserId, session);
+
+          // 주문 확인 메시지 생성 (인라인 버튼 포함)
+          const keyboardData = JSON.stringify({
+            type: 'server_order',
+            userId: session.telegramUserId,
+            index: selectedIndex,
+            plan: selected.plan_name
+          });
+
+          return `🖥️ ${selected.plan_name} 신청 확인\n\n` +
+            `• 제공사: ${selected.provider}\n` +
+            `• 스펙: ${selected.specs.vcpu}vCPU / ${selected.specs.ram_gb}GB / ${selected.specs.storage_gb}GB\n` +
+            `• 리전: ${selected.region.name} (${selected.region.code})\n` +
+            `• 가격: ₩${selected.price.monthly_krw.toLocaleString()}/월\n\n` +
+            `신청하시겠습니까?\n\n` +
+            `__KEYBOARD__${keyboardData}__END__`;
+        } else {
+          return `번호를 다시 확인해주세요. 1번부터 ${session.lastRecommendation.recommendations.length}번 중에서 선택해주세요.`;
+        }
+      }
+
+      // 선택하지 않고 다른 질문을 한 경우
+      return '서버 번호를 선택해주세요. (예: 1번)\n또는 "취소"라고 말씀하시면 처음부터 다시 시작합니다.';
+    }
+
     // Add user message to history
     session.messages.push({ role: 'user', content: userMessage });
 
@@ -410,7 +461,7 @@ export async function processServerConsultation(
       // Call recommendation API
       logger.info('추천 API 호출', { collectedInfo: session.collectedInfo });
 
-      const { executeServerAction } = await import('./tools/server-tool');
+      const { executeServerAction, getRecommendationData } = await import('./tools/server-tool');
 
       const techStack = session.collectedInfo.useCase
         ? inferTechStack(session.collectedInfo.useCase)
@@ -420,7 +471,48 @@ export async function processServerConsultation(
         ? inferExpectedUsers(session.collectedInfo.scale)
         : 100;
 
-      const recommendation = await executeServerAction(
+      const recommendationData = await getRecommendationData(
+        {
+          tech_stack: techStack,
+          expected_users: expectedUsers,
+          use_case: session.collectedInfo.useCase || '웹 서비스',
+          region_preference: session.collectedInfo.regionPreference,
+          budget_limit: session.collectedInfo.budgetLimit,
+          lang: 'ko',
+        },
+        env
+      );
+
+      // 추천 결과를 세션에 저장
+      if (recommendationData && recommendationData.recommendations && recommendationData.recommendations.length > 0) {
+        session.lastRecommendation = {
+          recommendations: recommendationData.recommendations.slice(0, 3).map(rec => ({
+            plan_name: rec.server.instance_name,
+            provider: rec.server.provider_name,
+            specs: {
+              vcpu: rec.server.vcpu,
+              ram_gb: rec.server.memory_gb,
+              storage_gb: rec.server.storage_gb
+            },
+            region: {
+              code: rec.server.region_code,
+              name: rec.server.region_name
+            },
+            price: {
+              monthly_krw: Math.round(rec.server.monthly_price),
+              bandwidth_tb: rec.server.transfer_tb
+            },
+            score: rec.score,
+            max_users: rec.estimated_capacity?.max_concurrent_users || 0
+          })),
+          createdAt: Date.now()
+        };
+
+        // Mark session as selecting (사용자 선택 대기)
+        session.status = 'selecting';
+        await saveServerSession(env.SESSION_KV, session.telegramUserId, session);
+
+        const formattedRecommendation = await executeServerAction(
           'recommend',
           {
             tech_stack: techStack,
@@ -434,11 +526,14 @@ export async function processServerConsultation(
           session.telegramUserId
         );
 
-      // Mark session as completed and delete
+        return `${aiResult.message}\n\n${formattedRecommendation}\n\n💡 원하는 서버 번호를 선택해주세요 (예: 1번)`;
+      } else {
+        // 추천 결과 없음 - 세션 삭제
         session.status = 'completed';
         await deleteServerSession(env.SESSION_KV, session.telegramUserId);
 
-      return `${aiResult.message}\n\n${recommendation}`;
+        return `${aiResult.message}\n\n조건에 맞는 서버를 찾지 못했습니다.`;
+      }
     } else {
       // Continue gathering information
       session.status = 'gathering';

src/tools/server-tool.ts

@@ -259,6 +259,51 @@ async function callCloudOrchestratorApi(
   }
 }
 
+// 추천 데이터 조회 (포맷팅 없이 원본 반환)
+export async function getRecommendationData(
+  args: {
+    tech_stack: string[];
+    expected_users: number;
+    use_case: string;
+    traffic_pattern?: string;
+    region_preference?: string[];
+    budget_limit?: number;
+    lang?: string;
+  },
+  env?: Env
+): Promise<RecommendResponse | null> {
+  const { tech_stack, expected_users, use_case, traffic_pattern, region_preference, budget_limit, lang } = args;
+
+  // 언어 자동 감지
+  const detectedLang = lang || detectLanguage(use_case);
+
+  // CDN 캐시 히트율 추정
+  const cdnCacheHitRate = estimateCdnCacheHitRate(tech_stack, use_case);
+
+  // API 요청 body 구성
+  const requestBody: Record<string, unknown> = {
+    tech_stack,
+    expected_users,
+    use_case,
+    lang: detectedLang,
+  };
+
+  if (traffic_pattern) requestBody.traffic_pattern = traffic_pattern;
+  if (region_preference) requestBody.region_preference = region_preference;
+  if (budget_limit) requestBody.budget_limit = budget_limit;
+  if (cdnCacheHitRate !== null) requestBody.cdn_cache_hit_rate = cdnCacheHitRate;
+
+  // API 호출
+  const result = await callCloudOrchestratorApi('/api/recommend', 'POST', requestBody, env);
+
+  if (isErrorResult(result)) {
+    logger.error('추천 데이터 조회 실패', new Error(result.error));
+    return null;
+  }
+
+  return result as RecommendResponse;
+}
+
 // 서버 추천 결과 포맷팅 (필수 정보만)
 // __DIRECT__ 마커로 AI 재해석 없이 바로 반환
 function formatRecommendations(data: RecommendResponse): string {

src/types.ts

@@ -224,7 +224,7 @@ export interface ManageServerArgs {
 // Server Consultation Session
 export interface ServerSession {
   telegramUserId: string;
-  status: 'gathering' | 'recommending' | 'completed';
+  status: 'gathering' | 'recommending' | 'selecting' | 'ordering' | 'completed';
   collectedInfo: {
     useCase?: string;
     scale?: 'personal' | 'business';
@@ -234,6 +234,18 @@ export interface ServerSession {
   messages: Array<{ role: 'user' | 'assistant'; content: string }>;
   createdAt: number;
   updatedAt: number;
+  lastRecommendation?: {
+    recommendations: Array<{
+      plan_name: string;
+      provider: string;
+      specs: { vcpu: number; ram_gb: number; storage_gb: number };
+      region: { code: string; name: string };
+      price: { monthly_krw: number; bandwidth_tb: number };
+      score: number;
+      max_users: number;
+    }>;
+    createdAt: number;
+  };
 }
 
 // Deposit Agent 결과 타입
@@ -381,7 +393,14 @@ export interface DomainRegisterKeyboardData {
   price: number;
 }
 
-export type KeyboardData = DomainRegisterKeyboardData;
+export interface ServerOrderKeyboardData {
+  type: "server_order";
+  userId: string;
+  index: number;  // recommendations 배열 인덱스
+  plan: string;   // 플랜 이름
+}
+
+export type KeyboardData = DomainRegisterKeyboardData | ServerOrderKeyboardData;
 
 // Workers AI Types (from worker-configuration.d.ts)
 export type WorkersAIModel =