fireworks 3

dsh 插件 · 烟花庆祝引擎：agent 编程时漂浮在对话窗口上空放烟花——开场迎宾、回合礼花、工具星花、里程碑大礼、收工终场、失败哑炮，每类事件一张烟花属性卡组，组内多变种随机抽取，token 用量决定烟花的大小、高度与绚烂程度。

Adds a celebratory fireworks overlay to the DSH Web UI through a happy_fireworks agent tool.

Rebuild DSH's pi-ai model catalogues at runtime: fetches the live model lists from OpenRouter, OpenCode Zen, Fireworks, Groq, Together and DeepSeek and patches the harness's installed pi-ai MODELS registry, so the model picker and discovery show fresh mod