Replace `posthog-docusaurus` plugin to official one

[jy-joung-bitor]

• Replace posthog-docusaurus plugin to officially-documented
• Remove useless legacies.

Summary by CodeRabbit

• Chores
  • Removed PostHog analytics integration from local plugin configuration.

[coderabbitai[bot]]

Walkthrough

Removes local PostHog plugin implementation files and updates Docusaurus configuration to reference PostHog as an external package dependency instead of a local plugin directory. The plugin initialization and page view tracking logic are migrated to external package management.

Changes

Cohort / File(s)	Change Summary
Deleted PostHog plugin files client-plugins/posthog-docusaurus/index.js, client-plugins/posthog-docusaurus/posthog.js	Removed complete local PostHog Docusaurus plugin implementation, including server-side plugin wrapper (API key validation, HTML tag injection, PostHog initialization) and client-side page view tracking hook.
Updated Docusaurus configuration docusaurus.config.ts	Changed plugin reference from local directory path to external package name, shifting plugin resolution to installed dependency.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

The review requires verification that the external package dependency is correctly referenced and available, understanding the scope of removed plugin functionality (validation logic, HTML injection, client-side tracking), and confirming no other references to the deleted files exist in the codebase.

Pre-merge checks

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title Check	✅ Passed	The pull request title "Replace posthog-docusaurus plugin to official one" accurately captures the main objective of the changeset. The modifications involve deleting two files containing the custom PostHog Docusaurus plugin implementation and updating the Docusaurus configuration to reference an official package instead. The title is clear, specific, and concise—it immediately communicates to reviewers that a custom plugin is being replaced with an official version, which aligns with the stated PR objective of adopting the officially documented PostHog Docusaurus integration.
Docstring Coverage	✅ Passed	No functions found in the changes. Docstring coverage check skipped.

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📜 Recent review details

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between dba7ffd30ef3544599506bc404912b69676f8241 and 957aff37761f699521c74029ff2b53c408efb254.

⛔ Files ignored due to path filters (1)

• package-lock.json is excluded by !**/package-lock.json

📒 Files selected for processing (3)

• client-plugins/posthog-docusaurus/index.js (0 hunks)
• client-plugins/posthog-docusaurus/posthog.js (0 hunks)
• docusaurus.config.ts (1 hunks)

💤 Files with no reviewable changes (2)

• client-plugins/posthog-docusaurus/posthog.js
• client-plugins/posthog-docusaurus/index.js

🔇 Additional comments (1)

docusaurus.config.ts (1)

84-93: Migration to official plugin is correct; no issues found.

The switch from the local plugin to the official posthog-docusaurus v2.0.4 package is sound. The apiKey, appUrl, enableInDevelopment, and person_profiles options are all valid PostHog initialization parameters. The person_profiles: "identified_only" setting (line 90) is actually the recommended default value—it captures anonymous events while deferring person profile creation until explicit identification.

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