dsh-sidebar-buttons: Plugin for managing the bottom buttons of the DSH left sidebar.

`lywusichen/dsh-sidebar-buttons` is an MIT-licensed plugin designed for the DeepSeek Harness (DSH) client, aiming to address issues such as disordered button order, inconsistent heights, and inconvenient visibility management of sidebar bottom buttons when multiple plugins are integrated. The plugin operates exclusively on the Web client, does not modify the DSH core code, and allows the system to revert to its original state upon uninstallation. Its core features include: 1. **Drag-and-drop sorting**, allowing users to adjust button order in the settings page with immediate effect; 2. **Three visibility modes**, supporting Fixed Display, Fold into More menu, and Hide, facilitating the management of infrequently used features; 3. **Unified height**, offering options for unified height, retaining original height, or custom height, ensuring consistency.