dsh-auto-chat-titles: A Semantic Conversation Title Plugin for DeepSeek Harness

The `dsh-auto-chat-titles` plugin replaces DeepSeek Harness (DSH)’s built-in policy with LLM-powered, semantics-based automatic chat title generation. It addresses insufficient semantic quality and configurability, supporting independent model selection, manual regeneration, context extraction, and real-time parameter adjustment. It fully inherits DSH’s core service behaviors, such as persistence and cancellation mechanisms. Users can install it via a Web Profile, configure the model, length, context window, and limiting parameters in settings, and trigger regeneration using the Regenerate Title button or command.