dsh-session-rerun: Inspect and Replay Completed Session Steps

`dsh-session-rerun` is a web plugin for DeepSeek Harness that helps developers inspect and replay historical session steps. It provides session timeline grouping, detailed status display, and file reference annotations, and supports replaying top-level or subagent steps in a new session without modifying source session data. With this tool, developers can efficiently analyze model responses, tool calls, and execution time, improving debugging efficiency in agent development.