Thinking-chain UI translation for DeepSeek Harness

Key features

• Read any thinking chain — reasoning, chain-of-thought, task cards and answers translated in real time, streamed batch by batch
• Host half (lib/index.js)provider adapters, LRU cache (600), /_xlate/models listing, /_xlate/model/pull + pull-status model download management (auto-configures on completion)
• the settings panel, thinking rows and task cards all follow your choice, and it persists across reloads
• Private & offline-first — local Ollama (qwen2.5:7b / 14b or custom) is the default provider: free, unlimited, nothing leaves your machine.
• First local-model selection auto-downloads the model with a live progress bar and enables it when done