Adding an Offline Mini-Games Panel to the DeepSeek Harness Web Interface with dsh-minigames

### 标准翻译版本（适配技术文档语境）： dsh-minigames is a DeepSeek Harness web interface enhancement plugin maintained by lhh010. It features a collapsible right-side mini-games panel with 18 offline Canvas games built-in, including Dino Jump, Tetris, Minesweeper, 2048, Sudoku, Pac-Man and others, and does not register tools for the model. This article verifies the installation commands, panel interactions, `registerGame` extension interface, as well as permissions, Web-only and persistence scope in accordance with the directory page and GitHub README.