fix(zai): respect model defaultTemperature

[hannesrudolph]

Summary

Ensure the Z.ai provider uses the model's when the user has not set , matching the precedence used elsewhere.

Changes

• Update temperature resolution in to prefer over provider defaults.
• Add regression tests covering temperature precedence in .

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Important

Fixes temperature precedence in ZAiHandler to use model's defaultTemperature when modelTemperature is not set, with tests added.

• Behavior:
  • Update temperature resolution in zai.ts to prefer info.defaultTemperature over provider defaults when modelTemperature is not set.
  • Add regression tests in zai.temperature.spec.ts to verify temperature precedence.
• Tests:
  • Test that ZAiHandler uses defaultTemperature when modelTemperature is not set.
  • Test that ZAiHandler uses modelTemperature when it is set.

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[roomote]

Oroocle   See task on Roo Cloud

Reviewed. No issues found; the temperature precedence change matches the shared OpenAI-compatible behavior.

• No issues flagged

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