Implement database export/import functionality for hardware migration

Added comprehensive database export/import system to safely migrate SSH connection data between different server environments.

Key Features:
- SQLite export format with encrypted data migration
- Hardware fingerprint protection and re-encryption
- Field mapping between TypeScript and database schemas
- Foreign key constraint handling for cross-environment imports
- Admin user assignment for imported SSH records
- Additive import strategy preserving existing data
- File upload support for import operations

Technical Implementation:
- Complete Drizzle ORM schema consistency
- Bidirectional field name mapping (userId ↔ user_id)
- Proper encryption/decryption workflow
- Multer file upload middleware integration
- Error handling and logging throughout

Security:
- Only exports SSH-related tables (ssh_data, ssh_credentials)
- Protects admin user data from migration conflicts
- Re-encrypts sensitive fields for target hardware
- Validates export file format and version compatibility

src/locales/zh/translation.json

@@ -369,37 +369,111 @@
     "migrationStatus": "迁移状态",
     "migrationCompleted": "迁移完成",
     "migrationRequired": "需要迁移",
-    "deviceProtectedMasterKey": "设备保护主密钥",
+    "deviceProtectedMasterKey": "环境保护主密钥",
     "legacyKeyStorage": "传统密钥存储",
-    "masterKeyEncryptedWithDeviceFingerprint": "主密钥已通过设备指纹加密（KEK 保护已激活）",
-    "keyNotProtectedByDeviceBinding": "密钥未受设备绑定保护（建议升级）",
+    "masterKeyEncryptedWithDeviceFingerprint": "主密钥已通过环境指纹加密（KEK 保护已激活）",
+    "keyNotProtectedByDeviceBinding": "密钥未受环境绑定保护（建议升级）",
     "valid": "有效",
     "initializeDatabaseEncryption": "初始化数据库加密",
-    "enableAes256EncryptionWithDeviceBinding": "启用具有设备绑定主密钥保护的 AES-256 加密。这为 SSH 密钥、密码和身份验证令牌创建企业级安全保护。",
+    "enableAes256EncryptionWithDeviceBinding": "启用具有环境绑定主密钥保护的 AES-256 加密。这为 SSH 密钥、密码和身份验证令牌创建企业级安全保护。",
     "featuresEnabled": "启用的功能：",
     "aes256GcmAuthenticatedEncryption": "AES-256-GCM 认证加密",
-    "deviceFingerprintMasterKeyProtection": "设备指纹主密钥保护 (KEK)",
+    "deviceFingerprintMasterKeyProtection": "环境指纹主密钥保护 (KEK)",
     "pbkdf2KeyDerivation": "PBKDF2 密钥推导（10万次迭代）",
     "automaticKeyManagement": "自动密钥管理和轮换",
     "initializing": "初始化中...",
     "initializeEnterpriseEncryption": "初始化企业级加密",
     "migrateExistingData": "迁移现有数据",
     "encryptExistingUnprotectedData": "加密数据库中现有的未保护数据。此过程安全可靠，会自动创建备份。",
-    "testMigrationDryRun": "测试迁移（演习模式）",
+    "testMigrationDryRun": "验证加密兼容性",
     "migrating": "迁移中...",
     "migrateData": "迁移数据",
     "securityInformation": "安全信息",
     "sshPrivateKeysEncryptedWithAes256": "SSH 私钥和密码使用 AES-256-GCM 加密",
     "userAuthTokensProtected": "用户认证令牌和 2FA 密钥受到保护",
     "masterKeysProtectedByDeviceFingerprint": "主加密密钥受设备指纹保护 (KEK)",
-    "keysBoundToServerInstance": "密钥绑定到此特定服务器实例",
+    "keysBoundToServerInstance": "密钥绑定到当前服务器环境（可通过环境变量迁移）",
     "pbkdf2HkdfKeyDerivation": "PBKDF2 + HKDF 密钥推导（10万次迭代）",
     "backwardCompatibleMigration": "迁移过程中所有数据保持向后兼容",
     "enterpriseGradeSecurityActive": "企业级安全已激活",
-    "masterKeysProtectedByDeviceBinding": "您的主加密密钥受设备指纹绑定保护。这意味着即使有人获得您的数据库文件访问权限，如果没有对此服务器的物理访问权限，他们也无法解密数据。",
+    "masterKeysProtectedByDeviceBinding": "您的主加密密钥受环境指纹保护。这基于服务器的主机名、路径等环境信息生成保护密钥。如需迁移服务器，可通过设置 DB_ENCRYPTION_KEY 环境变量来实现数据迁移。",
     "important": "重要提示",
-    "keepEncryptionKeysSecure": "请妥善保管您的加密密钥。丢失加密密钥将导致永久性数据丢失。建议定期备份。",
-    "loadingEncryptionStatus": "正在加载加密状态..."
+    "keepEncryptionKeysSecure": "确保数据安全：定期备份数据库文件和服务器配置。如需迁移到新服务器，请在新环境中设置 DB_ENCRYPTION_KEY 环境变量，或保持相同的主机名和目录结构。",
+    "loadingEncryptionStatus": "正在加载加密状态...",
+    "testMigrationDescription": "验证现有数据是否可以安全地迁移到加密格式，不会实际修改任何数据",
+    "serverMigrationGuide": "服务器迁移指南",
+    "migrationInstructions": "要将加密数据迁移到新服务器：1) 备份数据库文件，2) 在新服务器设置环境变量 DB_ENCRYPTION_KEY=\"你的密钥\"，3) 恢复数据库文件",
+    "environmentProtection": "环境保护",
+    "environmentProtectionDesc": "基于服务器环境信息（主机名、路径等）保护加密密钥，可通过环境变量实现迁移",
+    "verificationCompleted": "兼容性验证完成 - 未修改任何数据",
+    "verificationInProgress": "验证完成",
+    "dataMigrationCompleted": "数据迁移完成！",
+    "migrationCompleted": "迁移完成",
+    "verificationFailed": "兼容性验证失败",
+    "migrationFailed": "迁移失败",
+    "runningVerification": "正在进行兼容性验证...",
+    "startingMigration": "开始迁移...",
+    "hardwareFingerprintSecurity": "硬件指纹安全",
+    "hardwareBoundEncryption": "硬件绑定加密已激活",
+    "masterKeysNowProtectedByHardwareFingerprint": "主密钥现在受真实硬件指纹保护，而非环境变量",
+    "cpuSerialNumberDetection": "CPU 序列号检测",
+    "motherboardUuidIdentification": "主板 UUID 识别",
+    "diskSerialNumberVerification": "磁盘序列号验证",
+    "biosSerialNumberCheck": "BIOS 序列号检查",
+    "stableMacAddressFiltering": "稳定 MAC 地址过滤",
+    "databaseFileEncryption": "数据库文件加密",
+    "dualLayerProtection": "双层保护已激活",
+    "bothFieldAndFileEncryptionActive": "字段级和文件级加密现均已激活，提供最大安全保护",
+    "fieldLevelAes256Encryption": "敏感数据的字段级 AES-256 加密",
+    "fileLevelDatabaseEncryption": "硬件绑定的文件级数据库加密",
+    "hardwareBoundFileKeys": "硬件绑定的文件加密密钥",
+    "automaticEncryptedBackups": "自动加密备份创建",
+    "createEncryptedBackup": "创建加密备份",
+    "creatingBackup": "创建备份中...",
+    "backupCreated": "备份已创建",
+    "encryptedBackupCreatedSuccessfully": "加密备份创建成功",
+    "backupCreationFailed": "备份创建失败",
+    "databaseMigration": "数据库迁移",
+    "exportForMigration": "导出用于迁移",
+    "exportDatabaseForHardwareMigration": "导出 SQLite 格式的解密数据库以迁移到新硬件",
+    "exportDatabase": "导出 SQLite 数据库",
+    "exporting": "导出中...",
+    "exportCreated": "SQLite 导出已创建",
+    "exportContainsDecryptedData": "SQLite 导出包含解密数据 - 请保持安全！",
+    "databaseExportedSuccessfully": "SQLite 数据库导出成功",
+    "databaseExportFailed": "SQLite 数据库导出失败",
+    "importFromMigration": "从迁移导入",
+    "importDatabaseFromAnotherSystem": "从其他系统或硬件导入 SQLite 数据库",
+    "importDatabase": "导入 SQLite 数据库",
+    "importing": "导入中...",
+    "selectedFile": "选定 SQLite 文件",
+    "importWillReplaceExistingData": "SQLite 导入将替换现有数据 - 建议备份！",
+    "pleaseSelectImportFile": "请选择 SQLite 导入文件",
+    "databaseImportedSuccessfully": "SQLite 数据库导入成功",
+    "databaseImportFailed": "SQLite 数据库导入失败",
+    "manageEncryptionAndBackups": "管理加密密钥、数据库安全和备份操作",
+    "activeSecurityFeatures": "当前活跃的安全措施和保护功能",
+    "deviceBindingTechnology": "高级硬件密钥保护技术",
+    "backupAndRecovery": "安全备份创建和数据库恢复选项",
+    "crossSystemDataTransfer": "跨系统数据库导出和导入",
+    "noMigrationNeeded": "无需迁移",
+    "encryptionKey": "加密密钥",
+    "keyProtection": "密钥保护",
+    "active": "已激活",
+    "legacy": "旧版",
+    "dataStatus": "数据状态",
+    "encrypted": "已加密",
+    "needsMigration": "需要迁移",
+    "ready": "就绪",
+    "initializeEncryption": "初始化加密",
+    "initialize": "初始化",
+    "test": "测试",
+    "migrate": "迁移",
+    "backup": "备份",
+    "createBackup": "创建备份",
+    "exportImport": "导出/导入",
+    "export": "导出",
+    "import": "导入"
   },
   "hosts": {
     "title": "主机管理",