[TOOL-3873] Fix pageview tracking in dashboard, Add posthog to playground

[MananTank]

PR-Codex overview

This PR introduces enhancements to the PostHog integration across multiple applications, including the addition of the PosthogHeadSetup and PHProvider components, updates to environment variable handling, and adjustments in the next.config.mjs for improved security and functionality.

Detailed summary

• Added isProd constant in env.ts to check production environment.
• Introduced PosthogHeadSetup component for preconnecting to PostHog.
• Created PHProvider to manage PostHog initialization and context.
• Updated next.config.mjs to refine script-src directives.
• Implemented PosthogPageView component for tracking page views in multiple apps.
• Enhanced PosthogIdentifier to ensure PostHog is loaded before capturing events.
• Removed the old PostHogProvider from layout files and replaced it with PHProvider.

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[linear]

TOOL-3873 add posthog tracking to playground

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
docs-v2	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Mar 31, 2025 6:47pm
login	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Mar 31, 2025 6:47pm
thirdweb_playground	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Mar 31, 2025 6:47pm
thirdweb-www	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Mar 31, 2025 6:47pm

1 Skipped Deployment

Name	Status	Preview	Comments	Updated (UTC)
wallet-ui	⬜️ Skipped (Inspect)			Mar 31, 2025 6:47pm

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Latest commit: a17d893

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[MananTank]

• [TOOL-3873] Fix pageview tracking in dashboard, Add posthog to playground #6595 👈 (View in Graphite)
• main

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 54.98%. Comparing base (0dcde07) to head (a17d893).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6595   +/-   ##
=======================================
  Coverage   54.98%   54.98%           
=======================================
  Files         885      885           
  Lines       55517    55517           
  Branches     3794     3794           
=======================================
  Hits        30528    30528           
  Misses      24894    24894           
  Partials       95       95           

Flag	Coverage Δ
packages	54.98% <ø> (ø)

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[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
thirdweb (esm)	47.56 KB (0%)	952 ms (0%)	171 ms (+94.82% 🔺)	1.2 s
thirdweb (cjs)	127.31 KB (0%)	2.6 s (0%)	285 ms (+12.11% 🔺)	2.9 s
thirdweb (minimal + tree-shaking)	5.6 KB (0%)	113 ms (0%)	71 ms (+561.97% 🔺)	183 ms
thirdweb/chains (tree-shaking)	506 B (0%)	10 ms (0%)	50 ms (+1525.91% 🔺)	60 ms
thirdweb/react (minimal + tree-shaking)	19.34 KB (0%)	387 ms (0%)	108 ms (+435.41% 🔺)	495 ms

[graphite-app]

Merge activity

• Mar 31, 2:32 PM EDT: MananTank added this pull request to the Graphite merge queue.
• Mar 31, 2:50 PM EDT: A user merged this pull request with the Graphite merge queue.