dsh-sidebar-session-provider-icon: Sidebar Session Icon

This plugin adds visual identifiers to DeepSeek Harness sidebar sessions, showing the provider and model icons for each session. It reads model information from the Composer selector in real time, updates instantly when the model changes, and supports composite badge display. The plugin includes a fallback mechanism that uses history when validation is unavailable, requiring no network access or configuration. It is ready to use after installation and a restart, helping users quickly distinguish sessions using different models.