[JSDoc] Add Return Type Annotations and Usage Examples in src/lib/utils/analytics.ts

• Labels: good first issue, documentation, difficulty:beginner, area:core
• Target File: src/lib/utils/analytics.ts
• Estimated Time: 10–15 minutes
• Difficulty: Level 1 (Beginner)

Why This Matters

Comprehensive JSDoc documentation ensures developers and community contributors understand helper contracts and return values directly in IDE code autocomplete tooltips.

Current Behavior

Utility functions in src/lib/utils/analytics.ts lack formal JSDoc annotations detailing parameter expectations and example return objects.

Requested Change

Add standard JSDoc comments to export functions in src/lib/utils/analytics.ts detailing:

• @param specifications
• @returns object contract
• @example usage snippets

Acceptance Criteria

• JSDoc block added for all exported analytics helpers.
• Code passes type-checking cleanly without errors.
• Verification command succeeds with npm run test:file -- tests/analytics-domain-validation.test.ts.

Verification

npm run test:file -- tests/analytics-domain-validation.test.ts

Contributor Notes

Documentation-only improvement.

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Start with the exported functions in src/lib/utils/analytics.ts and inspect their parameters and returned objects. Add JSDoc covering @param, @returns, and @example for each exported analytics helper, then run npm run test:file -- tests/analytics-domain-validation.test.ts and confirm type-checking succeeds.