DC-6383 UTM params persistence fixed for nav bar

[aidankmcalister]

Summary by CodeRabbit

• New Features
  • Session-based UTM parameters are now automatically appended to Prisma Console navigation links and kept in sync for the duration of the session, including links added after the page initially loads.

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[github-actions]

Dangerous URL check

No absolute URLs to prisma.io/docs found.
No local URLs found.

[github-actions]

Redirect check

This PR probably requires the following redirects to be added to static/_redirects:

• This PR does not change any pages in a way that would require a redirect.

[coderabbitai]

Walkthrough

Adds a useEffect in src/theme/Layout/index.tsx that, on mount, reads utm_params from sessionStorage, merges them into the query strings of anchors linking to console.prisma.io, runs an initial update, observes DOM mutations to update new links, and disconnects the observer on unmount. (48 words)

Changes

Cohort / File(s)	Change Summary
Layout DOM UTM injector src/theme/Layout/index.tsx	Adds a useEffect that reads utm_params from sessionStorage, merges those UTM params into URLs of anchor elements targeting console.prisma.io (initial pass + MutationObserver for dynamic additions), and disconnects the observer on unmount. No exported APIs changed.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

• Verify MutationObserver is scoped (observing appropriate subtree/options) to avoid excessive callbacks.
• Inspect URL merging: ensure proper encoding, no duplicate keys, and correct handling of existing query strings/hash fragments.
• Confirm initial update covers existing links and observer covers dynamic link additions without reprocessing the same anchors repeatedly.
• Validate cleanup on unmount to avoid memory leaks or lingering observers.

Pre-merge checks

❌ 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%.	You can run @coderabbitai generate docstrings to improve docstring coverage.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and specifically references the primary change: adding UTM parameter persistence for navigation bar links to console.prisma.io, matching the actual implementation.

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• GitHub Check: Check internal links
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