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📌 Changelog – v1.4.1 🔒 Security Updates

• Password Hash Algorithm Upgrade - Upgraded from insecure SHA-256 to BCrypt encryption algorithm.
• New registrations automatically use BCrypt encryption. Existing users' passwords are automatically upgraded to the new format upon first successful login.
• Temporary OP Operation Security Enhancement - Improved security mechanism for [op] command execution to ensure OP status is correctly restored. 🧵 Concurrency Safety Fixes
• Fixed Non-Thread-Safe Collections - Replaced all HashMap/HashSet with thread-safe ConcurrentHashMap, resolving potential concurrency issues in multi-threaded environments. 🧹 Code Quality Improvements
• New Command Execution Utility Class - Unified command execution logic, supporting command prefixes such as [console] , [op] , [player] , [server] .
• Code Cleanup - Removed duplicate import statements and simplified code structure.
• Added support for version 1.21.11 ⚠️ Notes
• BCrypt computation is slower than SHA-256; this is a normal security characteristic and not a performance concern.