Gemini 2.5 flash determining its own thinking

[olweraltuve]

Related GitHub Issue

Closes: #3008

Description

Test Procedure

Type of Change

• 🐛 Bug Fix: Non-breaking change that fixes an issue.
• ✨ New Feature: Non-breaking change that adds functionality.
• 💥 Breaking Change: Fix or feature that would cause existing functionality to not work as expected.
• ♻️ Refactor: Code change that neither fixes a bug nor adds a feature.
• 💅 Style: Changes that do not affect the meaning of the code (white-space, formatting, etc.).
• 📚 Documentation: Updates to documentation files.
• ⚙️ Build/CI: Changes to the build process or CI configuration.
• 🧹 Chore: Other changes that don't modify src or test files.

Pre-Submission Checklist

• Issue Linked: This PR is linked to an approved GitHub Issue (see "Related GitHub Issue" above).
• Scope: My changes are focused on the linked issue (one major feature/fix per PR).
• Self-Review: I have performed a thorough self-review of my code.
• Code Quality:
  • My code adheres to the project's style guidelines.
  • There are no new linting errors or warnings (npm run lint).
  • All debug code (e.g., console.log) has been removed.
• Testing:
  • New and/or updated tests have been added to cover my changes.
  • All tests pass locally (npm test).
  • The application builds successfully with my changes.
• Branch Hygiene: My branch is up-to-date (rebased) with the main branch.
• Documentation Impact: I have considered if my changes require documentation updates (see "Documentation Updates" section below).
• Changeset: A changeset has been created using npm run changeset if this PR includes user-facing changes or dependency updates.
• Contribution Guidelines: I have read and agree to the Contributor Guidelines.

Screenshots / Videos

Documentation Updates

Additional Notes

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Important

Enhances Gemini 2.5 flash model's reasoning capabilities, updates build and linting scripts, and adds UI support for manual thinking budget.

• Behavior:
  • requiredReasoningBudget set to false for gemini-2.5-flash-preview-04-17 and gemini-2.5-flash-preview-05-20 in gemini.ts and vertex.ts.
  • GeminiHandler and VertexHandler updated to include includeThoughts in thinkingConfig.
  • ThinkingBudget.tsx defaults to enabling reasoning for Gemini Flash models if not set.
• Build and Linting:
  • Removed --ext=ts from lint scripts in package.json files across multiple packages.
  • Updated .husky/pre-push to handle pnpm command detection on Windows.
• UI and Localization:
  • Added manual thinking budget option in ThinkingBudget.tsx.
  • Updated translations in multiple settings.json files for new thinking budget feature.

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[hannesrudolph]

The approved issue does not contain anything about a new feature.

[hannesrudolph]

Closed in favour of #4386