fix(auth): send correct reset-password DTO using email, otp, password

[Emelie-Dev]

📌 Pull Request Title

📋 Description

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🛠 Changes Implemented

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✅ How to Test

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🚀 Checklist

• Code follows project style guidelines.
• Changes are tested and verified.
• Documentation is updated (if needed).

🔗 Related Issues

• Closes [Wave 100pts] Fix: POST /auth/reset-password returns 400 for all tested payloads — confirm required DTO with backend and update lib/api/auth.ts #173
• Resolves #<ISSUE_NUMBER>
• Fixes #<ISSUE_NUMBER>

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