feat: enhance database environment handling and cleanup project

- Add environment-specific database selection (SQLite for local, MariaDB for NAS)
- Remove edit button from admin detail view modal for cleaner UX
- Clean up project files: remove redundant docs and test files
- Update deployment script with improved SSH handling
- Maintain backward compatibility while supporting both database types

🤖 Generated with [Claude Code](https://claude.ai/code)

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

server.js

@@ -6,12 +6,26 @@ const fs = require('fs');
 const bcrypt = require('bcrypt');
 const session = require('express-session');
 const { v4: uuidv4 } = require('uuid');
-const DatabaseHelper = require('./database/db-helper');
+// 환경에 따른 데이터베이스 헬퍼 선택
+const isNAS = process.env.NODE_ENV === 'production' || process.env.DEPLOY_ENV === 'nas';
+const isWindows = process.platform === 'win32' && !isNAS;
+
+let DatabaseHelper;
+if (isNAS) {
+    DatabaseHelper = require('./database/mariadb-helper');
+    console.log('🗄️ NAS 환경: MariaDB 사용');
+} else if (isWindows) {
+    DatabaseHelper = require('./database/db-helper');
+    console.log('🗄️ 로컬 Windows 환경: SQLite 사용');
+} else {
+    DatabaseHelper = require('./database/mariadb-helper');
+    console.log('🗄️ Linux 환경: MariaDB 사용');
+}
 
 const app = express();
 const PORT = process.env.PORT || 3005;
 
-// 데이터베이스 헬퍼 인스턴스 (SQLite - 로컬 테스트용)
+// 데이터베이스 헬퍼 인스턴스
 const db = new DatabaseHelper();
 
 // 미들웨어 설정