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>

admin/script.js

@@ -1330,7 +1330,6 @@ class AdminFileManager {
                     </div>
                     <div class="modal-footer">
                         <button class="btn btn-secondary" onclick="this.closest('.modal-overlay').remove()">닫기</button>
-                        <button class="btn btn-primary" onclick="adminManager.editFile('${file.id}')">수정</button>
                         <button class="btn btn-danger" onclick="adminManager.deleteFile('${file.id}')">삭제</button>
                     </div>
                 </div>