feat: async task ops, usage cache persistence, and dashboard UI refresh

Improve account diagnostics and Gemini manual token import

Add Gemini CLI auth flow and document upgrade path

docs: clarify upstream origin and enhancement scope

docs: refresh dashboard screenshots

Polish dashboard UX and document control features

Improve dashboard auth diagnostics and model controls

docs: expand README with full guide and screenshots

feat: add one-click local and tencent deployment kits

feat: bootstrap reusable cliproxy + openclaw management stack