feat: 알림톡 발송 로그 시스템 + 현영 표시 + 문서화

- 알림톡 발송 로그: alimtalk_logs SQLite 테이블 + DB 자동 기록
- /admin/alimtalk 페이지: 서버 로그, NHN Cloud 내역 조회, 수동 발송 테스트
- 적립일시 포맷 수정: %Y-%m-%d %H:%M (16자 초과) → %m/%d %H:%M (11자)
- POS GUI 현금영수증(현영) 표시: 청록색 볼드
- 결제수납구조.md: CD_SUNAB/PS_main/SALE_MAIN 3테이블 관계 문서
- 실행구조.md: Flask 서버 + Qt GUI 실행 가이드

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/db/dbsetup.py

@@ -237,7 +237,7 @@ class DatabaseManager:
         print(f"[DB Manager] SQLite 스키마 초기화 완료")
 
     def _migrate_sqlite(self):
-        """기존 DB에 새 컬럼 추가 (마이그레이션)"""
+        """기존 DB에 새 컬럼/테이블 추가 (마이그레이션)"""
         cursor = self.sqlite_conn.cursor()
         cursor.execute("PRAGMA table_info(users)")
         columns = [row[1] for row in cursor.fetchall()]
@@ -246,6 +246,29 @@ class DatabaseManager:
             self.sqlite_conn.commit()
             print("[DB Manager] SQLite 마이그레이션: users.birthday 컬럼 추가")
 
+        # alimtalk_logs 테이블 생성
+        cursor.execute("SELECT name FROM sqlite_master WHERE type='table' AND name='alimtalk_logs'")
+        if not cursor.fetchone():
+            cursor.executescript("""
+                CREATE TABLE IF NOT EXISTS alimtalk_logs (
+                    id INTEGER PRIMARY KEY AUTOINCREMENT,
+                    template_code VARCHAR(50) NOT NULL,
+                    recipient_no VARCHAR(20) NOT NULL,
+                    user_id INTEGER,
+                    trigger_source VARCHAR(20) NOT NULL,
+                    template_params TEXT,
+                    success BOOLEAN NOT NULL,
+                    result_message TEXT,
+                    transaction_id VARCHAR(20),
+                    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+                    FOREIGN KEY (user_id) REFERENCES users(id)
+                );
+                CREATE INDEX IF NOT EXISTS idx_alimtalk_created ON alimtalk_logs(created_at);
+                CREATE INDEX IF NOT EXISTS idx_alimtalk_recipient ON alimtalk_logs(recipient_no);
+            """)
+            self.sqlite_conn.commit()
+            print("[DB Manager] SQLite 마이그레이션: alimtalk_logs 테이블 생성")
+
     def test_connection(self, database='PM_BASE'):
         """연결 테스트"""
         try:

backend/db/mileage_schema.sql

@@ -80,3 +80,21 @@ CREATE TABLE IF NOT EXISTS pos_customer_links (
 );
 
 CREATE INDEX IF NOT EXISTS idx_links_cuscode ON pos_customer_links(cuscode);
+
+-- 6. 알림톡 발송 로그 테이블
+CREATE TABLE IF NOT EXISTS alimtalk_logs (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    template_code VARCHAR(50) NOT NULL,
+    recipient_no VARCHAR(20) NOT NULL,
+    user_id INTEGER,
+    trigger_source VARCHAR(20) NOT NULL,       -- 'kiosk', 'admin', 'manual' 등
+    template_params TEXT,                       -- JSON 문자열
+    success BOOLEAN NOT NULL,
+    result_message TEXT,
+    transaction_id VARCHAR(20),
+    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (user_id) REFERENCES users(id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_alimtalk_created ON alimtalk_logs(created_at);
+CREATE INDEX IF NOT EXISTS idx_alimtalk_recipient ON alimtalk_logs(recipient_no);