feat: centralize model family defaults for tool preferences across all providers

[roomote]

Related GitHub Issue

Closes: #10214

Description

This PR attempts to address Issue #10214 by creating a centralized framework for applying model family defaults to tool preferences and settings across all providers.

Key implementation details:

1. New model-family-defaults.ts module - Contains MODEL_FAMILY_REGISTRY array and applyModelFamilyDefaults() function

   • Uses first-match-wins pattern matching (more specific patterns first)
   • Currently includes Gemini 3, general Gemini, and OpenAI/GPT model families
   • Only applies defaults when properties are NOT already set (preserving explicit values)

2. BaseProvider.applyModelDefaults() helper - Protected method available to all providers extending BaseProvider

3. Updated all provider getModel() methods - Calls applyModelDefaults() to apply family-based tool preferences

4. Removed router-tool-preferences.ts - Functionality consolidated into the new centralized module

Design decisions:

• Granular precedence: Provider/model-specific settings take precedence over family defaults
• Pattern-based matching: Regex patterns allow flexible model family matching
• Extensible registry: New model families can be easily added to MODEL_FAMILY_REGISTRY

Test Procedure

1. Unit tests added in src/api/providers/utils/__tests__/model-family-defaults.spec.ts
2. All 25 tests pass
3. TypeScript type checking passes
4. Linting passes

To verify:

cd src && npx vitest run api/providers/utils/__tests__/model-family-defaults.spec.ts

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.
• Testing: New and/or updated tests have been added to cover my changes (if applicable).
• Documentation Impact: I have considered if my changes require documentation updates (see "Documentation Updates" section below).
• Contribution Guidelines: I have read and agree to the Contributor Guidelines.

Documentation Updates

• No documentation updates are required.

Additional Notes

Feedback and guidance are welcome. This is an initial implementation of the centralized framework for model family defaults.

[roomote]

Rooviewer   See task on Roo Cloud

Review complete. No issues found.

The implementation is clean and well-tested:

• New model-family-defaults.ts module with pattern-based model family matching
• applyModelFamilyDefaults() correctly applies defaults only when properties are undefined
• All 33+ provider files consistently integrated
• 25 tests pass covering all model families and edge cases

_{Mention @roomote in a comment to request specific changes to this pull request or fix all unresolved issues.}