DeepSeek Harness coding-subscription OAuth

Key features

• Bring your own subscription — SuperGrok, ChatGPT Plus/Pro, Kimi Code, Claude Pro/Max
• All eight switches start off and apply live (no restart): codexSearch, codexImages, codexImageEdits, codexImagesAnyModel, codexUsage, codexFast, grokImagineImage, and grokImagineVideo.
• Coding-subscription OAuth for DeepSeek Harness.
• Grok BuildResponses API on cli-chat-proxy.grok.com/v1 (not api.x.ai), CLI fingerprint headers, live /v1/models-v2 including grok-4.6 reasoning.effort: xhigh.
• Local OAuth, no key-pasting — authorize in Settings or CLI