fix(openai-compatible): add max reasoning effort option

[ivanarifin]

Summary

• Adds a UI compatibility option for OpenAI-compatible providers to set maximum reasoning effort.
• Persists the selected value and forwards it to compatible API requests.

Focused tests

• cd src && npx vitest run api/providers/__tests__/openai.spec.ts — 1 file / 64 tests passed.
• cd webview-ui && npx vitest run src/components/settings/providers/__tests__/OpenAICompatible.spec.tsx — 1 file / 11 tests passed.

Closes: #882

Summary by CodeRabbit

• New Features

  • Added support for the “max” reasoning effort option in OpenAI-compatible provider settings.
  • Selected “max” reasoning effort is now preserved when configuring supported models.

• Tests

  • Added coverage confirming the “max” option appears in settings and is passed through correctly.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 99c18747-3982-4bd4-889e-1d341c71e25a

📥 Commits

Reviewing files that changed from the base of the PR and between dcaa3cb and 1952be8.

📒 Files selected for processing (3)

• src/api/providers/__tests__/openai.spec.ts
• webview-ui/src/components/settings/providers/OpenAICompatible.tsx
• webview-ui/src/components/settings/providers/__tests__/OpenAICompatible.spec.tsx

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📝 Walkthrough

Walkthrough

The OpenAI-compatible settings now supports the extended max reasoning effort value, persists selections using the extended type, and verifies that max reaches the underlying OpenAI-compatible request.

Changes

OpenAI-compatible reasoning effort

Layer / File(s)	Summary
UI reasoning effort support webview-ui/src/components/settings/providers/OpenAICompatible.tsx, webview-ui/src/components/settings/providers/__tests__/OpenAICompatible.spec.tsx	Uses ReasoningEffortExtended, exposes max to ThinkingBudget, and tests persistence of a selected max value.
Request passthrough validation src/api/providers/__tests__/openai.spec.ts	Verifies reasoning_effort: "max" is passed to the OpenAI-compatible completion request.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• Zoo-Code-Org/Zoo-Code#774: Extends ThinkingBudget handling for reasoning-effort tiers including xhigh and max.
• Zoo-Code-Org/Zoo-Code#876: Adds max to supported reasoning-effort values for specific GPT models.
• Zoo-Code-Org/Zoo-Code#933: Updates provider request handling to emit max reasoning effort.

Suggested labels: awaiting-review

Suggested reviewers: taltas

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly matches the main change: adding max reasoning effort support for OpenAI-compatible providers.
Description check	✅ Passed	The description includes the linked issue and test results, though it does not follow the repository template headings exactly.
Linked Issues check	✅ Passed	The changes add max thinking mode support in the OpenAI-compatible path and tests cover the new value, matching issue #882.
Out of Scope Changes check	✅ Passed	The diff stays focused on reasoning-effort support and related tests without unrelated code changes.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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