dsh-change-center: DSH File Change Review and Rollback Center

dsh-change-center is a DeepSeek Harness plugin positioned as a unified management center for file changes. It captures results generated by Agents such as write, edit, and bash, automatically grouping them into change sessions. It adopts a "capture and register" mechanism and establishes before snapshots to support rollback and recovery. Core functions include state management (applied can be rolled back, rolled_back can be recovered), block-level operations (applying, undoing, or editing a single hunk), as well as support for Diff views and change trees in modes such as unified and side-by-side. In addition, the plugin provides AI review, risk verification, and background task support. When integrating, the package must be added to the `dsh.profile.bundles` configuration in the profile, and dependencies on the `@deepseek-ai` series must be satisfied. Use cases cover viewing differences and reviewing...