v1.2.2 — Project documentation

Reorganize the project documentation so the README focuses on features, screenshots and setup, with detailed operations in separate bilingual guides.

• Rebuild Chinese and English READMEs with release/CI/license badges, core features, a primary preview and expandable model screenshots, requirements, quick start, navigation and FAQ.
• Preserve account management, automatic check-in, rotation, model discovery, reasoning options and visibility documentation in user guides.
• Add a contribution guide with isolated testing and packaging instructions. Ship the linked guides and marketplace record in the archive.
• Retain both independent disclaimers and all upstream notices and licenses. README links to the usage notices are in the final credits/license section rather than an opening callout.

Runtime behavior is unchanged from v1.2.1. The complete original console, native model picker, reasoning options and visibility controls remain available. This release contains no personal accounts or local configuration.

Validation: documentation links and Markdown structure, package privacy/syntax audit, and Windows/Ubuntu/macOS CI on the exact release commit (12 Node tests, 131 Python tests and isolated real DSH installation/model/console/lifecycle checks). Offline validation does not establish live quotas or platform authorization.

Downloads: prebuilt dsh-trae-relay.tgz and SHA256SUMS.txt.