fix: infinite recursion in getReferrer() crashing all pages

[Hugo0]

URGENT

getReferrer() in analytics.ts calls itself instead of document.referrer, causing RangeError: Maximum call stack size exceeded. This crashes the Vue app on ALL pages — the homepage shows no languages, game pages don't load.

Fix

-const getReferrer = (): string => getReferrer();
+const getReferrer = (): string => document.referrer || 'direct';

Introduced in PR #159 (slim GA4 refactor) — the replace_all edit that replaced document.referrer || 'direct' with getReferrer() also caught the function definition itself.

Summary by CodeRabbit

Bug Fixes

• Fixed an issue where analytics referrer tracking was causing crashes. Referrer data is now properly captured for analytics functionality.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 8837ae37-a2f7-4d26-aa13-b8a854cfdbff

📥 Commits

Reviewing files that changed from the base of the PR and between 6072ff4 and 8e7e12e.

📒 Files selected for processing (1)

• frontend/src/analytics.ts

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📝 Walkthrough

Walkthrough

A self-recursive bug in the getReferrer function is fixed by replacing the erroneous recursive call with direct document.referrer retrieval, falling back to 'direct' when unavailable. This single-line fix resolves infinite recursion behavior.

Changes

Cohort / File(s)	Summary
Analytics Referrer Fix frontend/src/analytics.ts	Fixed self-recursive call in getReferrer function; now directly retrieves document.referrer with 'direct' fallback instead of infinitely recursing.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 A rabbit found a loop of endless dread,
Where getReferrer chased its own head,
One line was swapped, the recursion ceased,
Now document.referrer's finally released! 🎉

✨ Finishing Touches

• 📝 Generate docstrings (stacked PR)
• 📝 Generate docstrings (commit on current branch)

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix-getreferrer-recursion

📝 Coding Plan

• Generate coding plan for human review comments

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