Added constant and enums

[LevelSilence]

Issue: #110

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PRs without an issue number may not be reviewed.

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Thank you for contributing to SubSentry 🚀
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📌 Description

Briefly explain what you implemented in this PR.

• What problem does it solve?
• What part of the project does it affect?

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🧩 Issue Reference

Related Issue: #110

Note: Do NOT use words like Closes, Fixes, or Resolves.
Issues are Open for All and should not be auto-closed.

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🛠️ What Did You Implement?

Please list the major things you worked on in this PR:

• Feature implementation
• UI changes
• API / backend logic
• Refactor / cleanup
• Documentation update
• Demo / setup task

(Select all that apply)

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📁 Workspace Confirmation (MANDATORY)

Since all issues are Open for All, confirm the following:

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  contributors/<your-github-username>/
• Base client/ and/or server/ files were copied from the main directory
• No files outside my personal workspace were modified

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🧪 Testing Performed

Please check what applies:

• Frontend runs locally without errors
• Backend server runs locally without errors
• APIs tested with valid inputs
• APIs tested with invalid / edge-case inputs
• No console errors or warnings

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📷 Screenshots / Demo (REQUIRED for most PRs)

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✅ Final PR Checklist

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• This PR addresses only one issue
• Issue number is mentioned at the top
• Code is readable and well-structured
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• No sensitive data or .env files committed
• Commit messages follow project conventions
• PR title is clear and descriptive

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📎 Additional Notes for Reviewers

Note: Earlier frontend and backend setup work was submitted separately and closed without my pr been merged. This PR is independent of that work and is intentionally scoped only to the constants refactor to align strictly with the current issue requirements.

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[OpenGitBot]

Hey @LevelSilence

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