Review fold (round 1, simplify reuse + quality):
- tokenhub_effort() in agent/reasoning_effort.py: the tencent-tokenhub profile and the host-based
branch base_url-only agents take used the same "high unless chosen, else clamp" expression in
two places, so the two paths could drift apart.
- generic_nested_reasoning(): the OpenAI-compatible extra_body fallback auxiliary calls send when a
profile declares no reasoning shape. The lmstudio profile's auxiliary branch was a line-for-line
copy (it must produce it itself because overriding build_api_kwargs_extras turns the aux
fallback off). Both now call the helper.
- agent/lmstudio_reasoning.py docstring names its real caller (the lmstudio profile).
Behaviour unchanged: 42/42 main-loop request cells and every auxiliary projection cell are
byte-identical to origin/main.
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