dsh-journal-calendar: Daily Journal and Calendar for DeepSeek Harness

`dsh-journal-calendar` is an open-source plugin for DeepSeek Harness (DSH) aimed at solving agent memory and state management issues. It stores journal entries as JSON files, provides a `journal_record` tool for recording plans and memories, and displays them in the right sidebar of the web interface as a calendar view and a task list, with support for interactive checking and inline editing. The plugin is simple to install, depends on pnpm, and its file format must remain valid.