dsh-model-preset: One-click model combination switching above the DSH Web input box

# Introduction When developing agents using DSH (DeepSeek Harness), switching models requires confirming three dimensions: provider, model, and reasoning effort. In daily operations, I often toggle between "fast results" and "deep reasoning" configurations, requiring the opening of the built-in model selector and manual re-selection of items each time. If common combinations could be fixed as buttons, a single click would complete the switch, saving this repetitive operation. The `dsh-model-preset` introduced below does exactly that. # What is this? `dsh-model-preset` is maintained by kaixinbaba (repository: kaixinbaba/dsh-model-preset), licensed under MIT, current version...