dsh-recovery: Emergency Recovery Tool for the DeepSeek Harness Web Interface

`dsh-recovery` is a web-based emergency recovery tool for DeepSeek Harness (DSH), designed to resolve Web admin interface crashes caused by missing optional plugins or startup errors. By isolating failed plugins, generating diagnostic reports, and supporting one-click repair of dependencies and configuration files from the Web interface, it ensures the system can continue running in a minimal safe mode when plugins malfunction. After installation, users can perform comprehensive checks and fixes on the settings page, with a safe rollback mechanism to prevent configuration loss if a repair fails.