[Chore] Add test coverage for Roo-to-Zoo user-facing string changes

[zoomote]

Opened on behalf of Naved Merchant. View the task or mention @zoomote for follow-up asks.

Related GitHub Issue

Related to #551, builds on #971

Description

This PR stacks additional test coverage on top of #971 (the Roo -> Zoo user-facing string rebrand). It contains all of #971's commits plus one test-only commit. No production code changes.

New coverage for #971's changed code:

• LM Studio provider: the existing createMessage and completePrompt error tests now assert the full branded message ("...larger context length to work with Zoo Code's prompts."), guarding both error-wrapping paths in lm-studio.ts.
• VS Code LM provider: new tests assert the LM authorization justification is branded ("Zoo Code would like to use ...") and that client initialization failures throw the Zoo Code branded error, including the nested "Failed to select model" wrap.
• i18n locales: a new spec verifies every shipped locale's tools.json defines missingToolParameter and missingToolParameterWithPath with all interpolation placeholders ({{toolName}}, {{relPath}}, {{paramName}}), and that the English copy says "Zoo", not "Roo". The locale list is read from the filesystem, so future locales are covered automatically.

Test Procedure

• pnpm test — all packages pass (10/10 turbo tasks)
• pnpm lint — all checks successful
• pnpm check-types — all checks successful
• Targeted: npx vitest run api/providers/__tests__/lmstudio.spec.ts api/providers/__tests__/vscode-lm.spec.ts i18n/__tests__/tools-missing-param.spec.ts — 39/39 passed

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.

Screenshots / Videos

Test-only change; no UI impact.

Documentation Updates

No documentation updates are required.

Additional Notes

This branch is based on #971's head (fix/rename-roo-to-zoo-user-strings from the contributor fork) since maintainer pushes to the fork were not available. Once #971 merges, this PR's diff against main reduces to the single test-only commit. Alternatively, a maintainer can cherry-pick the last commit (a01f9f57e) onto #971's branch.

[zoomote]

No code issues found. See task

_{Reviewed a01f9f5}

[codecov]

Codecov Report

❌ Patch coverage is 32.43243% with 25 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/api/providers/vscode-lm.ts	30.30%	23 Missing ⚠️
src/api/transform/vscode-lm-format.ts	0.00%	2 Missing ⚠️

📢 Thoughts on this report? Let us know!

[zoomote]

Closing: coverage commit pushed directly to #971's branch instead (a7ae66a).