feat(shared): add moonshot model family support

[narcilee7]

Summary

Add support for Moonshot AI (Kimi) vision models in Midscene.js.

Changes

• Add moonshot to TModelFamily type and MODEL_FAMILY_VALUES array
• Add MIDSCENE_USE_MOONSHOT legacy environment variable for quick configuration
• Add moonshot mapping in legacyConfigToModelFamily
• Add unit tests for model family validation and legacy config parsing

Why

Moonshot API is fully OpenAI-compatible, so it can reuse Midscene's existing VLM calling chain. However, registering it as a first-class modelFamily ensures:

1. Planning prompt includes bbox: When modelFamily is set, the planning prompt correctly describes the locate param as {bbox: [xmin, ymin, xmax, ymax], prompt: string}, allowing the model to return coordinates directly in the planning phase.
2. Avoids extra locate API call: Without a model family, the planning prompt only asks for {prompt: string}, forcing a separate locate call afterward.
3. Clean user configuration: Users can explicitly set MIDSCENE_MODEL_FAMILY=moonshot or MIDSCENE_USE_MOONSHOT=1.

Usage

export MIDSCENE_MODEL_FAMILY="moonshot"
export MIDSCENE_MODEL_NAME="kimi-k2.5"
export MIDSCENE_MODEL_BASE_URL="https://api.moonshot.cn/v1"
export MIDSCENE_MODEL_API_KEY="your-api-key"

Or via legacy flag:

export MIDSCENE_USE_MOONSHOT=1
export MIDSCENE_MODEL_NAME="kimi-k2.5"
export MIDSCENE_MODEL_BASE_URL="https://api.moonshot.cn/v1"
export MIDSCENE_MODEL_API_KEY="your-api-key"

Validation

• pnpm run lint
• npx nx test @midscene/shared (325 passed)
• npx nx test @midscene/core (817 passed)

[hukz37]

@narcilee7 大佬请问一下，增加了配置后，具体效果怎么样？我本次运行试了一下，基本识别不到呢，还需要配置别的什么吗