LongCat reasoning toggle falls back to unsupported OpenAI effort variants

Description

The direct LongCat provider declares binary reasoning in models.dev, but OpenCode's reasoningToggle() only handles Alibaba and Cohere. LongCat falls back to generic effort variants, so requests omit the documented thinking.type toggle. Selecting off cannot explicitly disable thinking.

LongCat expects thinking: {"type":"disabled"} or {"type":"enabled"}, not reasoning_effort. Reference: https://longcat.chat/platform/docs/zh/api/chat

OpenCode version

Current dev at ecbc6ccac85b3e8087b6445e584318419b9e2b34.

Steps to reproduce

1. Normalize the models.dev longcat provider with Provider.fromModelsDevProvider.
2. Pass its none/high variant through ProviderTransform.providerOptions and the actual @ai-sdk/openai-compatible client.
3. Capture the outgoing JSON: thinking is absent for both states.

A regression using SDK request capture reproduces this without a live API key. A small fix is prepared that maps the first-party LongCat toggle to none/high and preserves other SDK/provider behavior.

Operating System

macOS

AI assistance: Codex helped investigate, implement, and test this report's fix.