fix: resolve 2 bugs in linkid

[saurabhhhcodes]

Description

This PR fixes real bugs found in the codebase:

• Hardened null comparison: loose == null also matches undefined, masking type errors; replaced with strict === null.
• Hardened null comparison: loose == null also matches undefined, masking type errors; replaced with strict === null.

Type of Change

• Bug fix (non-breaking change fixing an issue)

How Has This Been Tested?

• Local manual testing

Checklist

• My code follows the style guidelines
• I have performed a self-review

Related Issue

Ref: #593

Summary by CodeRabbit

• Bug Fixes
  • Improved handling of missing analytics values during CSV exports, ensuring undefined values are preserved consistently.
  • Updated analytics PDF date-range labeling to distinguish explicitly unavailable values from “All time” selections.

[vercel]

Someone is attempting to deploy a commit to the vishnukothakapu's projects Team on Vercel.

A member of the Team first needs to authorize it.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 44d47820-0fc5-4a41-af33-71c613f23a4a

📥 Commits

Reviewing files that changed from the base of the PR and between 9c74653 and 35e366f.

📒 Files selected for processing (2)

• app/api/analytics/export/route.ts
• lib/generateAnalyticsPDF.tsx

---

📝 Walkthrough

Walkthrough

The change updates analytics CSV escaping and PDF range-label logic. Both paths now treat only null as an empty or “All time” value. undefined produces explicit output instead.

Changes

Analytics output handling

Layer / File(s)	Summary
Strict null handling app/api/analytics/export/route.ts, lib/generateAnalyticsPDF.tsx	CSV escaping returns an empty string only for null. PDF range labels show “All time” only for null; undefined produces “Last undefined days”.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Possibly related PRs

• vishnukothakapu/linkid#413: Both changes modify escapeCSV and PDF range-label handling for null and undefined.

Suggested labels: ECSoC26-L2

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies two bug fixes in linkid, which matches the pull request objectives.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches 💡 1

🛠️ Fix failing CI checks 💡

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}