test: add trustedProxy coverage tests

[navyabansal21]

Description

Adds a new test suite for utils/trustedProxy.ts in utils/trustedProxy.theme-contrast.test.ts.

The target file contains trusted proxy and IP validation utilities, so the tests focus on the actual implemented behavior, including IPv4 validation, CIDR matching, trusted proxy detection, and private range handling.

Fixes #4542

Pillar

• 🎨 Pillar 1 — New Theme Design
• 📐 Pillar 2 — Geometric SVG Improvement
• 🕐 Pillar 3 — Timezone Logic Optimization
• 🛠️ Other (Bug fix, refactoring, docs)

Visual Preview

N/A (test-only changes)

Checklist before requesting a review:

• I have read the CONTRIBUTING.md file.
• I have tested these changes locally.
• I have run npm run format and npm run lint locally and resolved all errors.
• My commits follow the Conventional Commits format.
• I have updated README.md if I added a new theme or URL parameter. (Not applicable)
• I have starred the repo.
• I have made sure that I have only one commit to merge in this PR.
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• (Recommended) I joined the CommitPulse Discord community for contributor discussions, mentorship, and faster PR support.

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[github-actions]

🚨 Hey @navyabansal21, the CI Pipeline is failing on this PR and it has been marked as status:blocked.

Please fix the issues before this can be reviewed. Here's how:

1. Run checks locally before pushing:

npm run format:check   # Check Prettier formatting
npm run lint           # Run ESLint
npm run typecheck      # TypeScript type check
npm run test           # Run unit tests (Vitest)
npm run build          # Verify production build passes

2. Auto-fix common issues:

npm run format         # Auto-fix formatting with Prettier
npm run lint -- --fix  # Auto-fix lint errors where possible

3. Check the full failure log here:
👉 View CI Run

Once you push a fix and the CI passes, the status:blocked label will be removed automatically. 💪

[Aamod-Dev]

Thanks for the contribution. I've reviewed the tests, and while they correctly validate the trusted proxy logic, the file naming and test suite description seem to be incorrect. They currently refer to 'Theme Contrast Cohesion', which doesn't align with the content of the tests.

Please rename the file from \ rustedProxy.theme-contrast.test.ts\ to something more appropriate like \ rustedProxy.coverage.test.ts, or simply merge these tests into the existing \ rustedProxy.test.ts. Similarly, please update the \describe\ block to reflect what is actually being tested (e.g., 'Trusted Proxy Utilities').

Labels Applied:

• \level:beginner: This PR adds self-contained unit tests for existing utility functions without complex setup.
• \ ype:testing: The primary purpose of this PR is to add unit tests.
• \mentor:Aamod007\

Once these minor naming issues are resolved, this will be ready to merge.

[Aamod-Dev]

Review Update
Automatically adjusted labels to meet the strict 1:1:1:1:1 category requirement.

[Aamod-Dev]

Thanks for renaming the file and updating the test description! Approving.

[github-actions]

🎉 Congratulations @navyabansal21! Your PR has been successfully merged. 🚀

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