fix:Added zod schema unit tests for all 6 MCP tool input contracts

[VALENTINE-it]

#9

Linked issue

Closes #___

Type of change

• Bug fix (non-breaking change that fixes an issue)
• Feature (non-breaking change that adds functionality)
• Performance improvement
• Documentation only
• Refactor (no behavior change)
• Test additions or fixes
• Chore (tooling, deps, build config)

What changed

Testing notes

$ npm run test:run
...

$ npm run build
...

Claim confirmation

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• I starred the repo ⭐ — see CONTRIBUTING.md → How to claim. This is now enforced by CI (.github/workflows/star-check.yml) — the "Star Check" status will block merge until you star.
• I commented I'll take this (or similar) on the issue before starting work, so two people don't accidentally race on the same issue. (Honor-system; not CI-enforced.)

If this PR is from a maintainer or a follow-up to a tracked plan, both can be skipped — just delete this section. Maintainer/bot/tracked-plan-labeled PRs are auto-exempted by the Star Check workflow.

Checklist

• npm run test:run passes locally (or pre-existing failures are unrelated to this change)
• npm run build succeeds locally
• CHANGELOG.md entry added under ## [Unreleased] (skip for docs-only or test-only PRs)
• PR title follows Conventional Commits (e.g., fix(panel): ...)
• No new runtime dependencies added without prior discussion in a Discussion

Screenshots / GIFs

Additional notes

[VALENTINE-it]