fix(web): redact invite analytics URLs

apps/web/app/PostHogPageView.test.ts

@@ -0,0 +1,24 @@
+import { readFile } from 'node:fs/promises'
+import { describe, expect, it } from 'vitest'
+
+const pageViewPath = new URL('./PostHogPageView.tsx', import.meta.url)
+const providerPath = new URL('./providers.tsx', import.meta.url)
+
+describe('PostHog invite privacy boundary', () => {
+  it('does not send a global page view for invite routes', async () => {
+    const source = await readFile(pageViewPath, 'utf8')
+
+    expect(source).toContain("pathname?.startsWith('/join/')")
+    expect(source.indexOf("pathname?.startsWith('/join/')")).toBeLessThan(source.indexOf("posthog.capture('$pageview'"))
+  })
+
+  it('disables automatic page-leave capture and redacts join URLs', async () => {
+    const source = await readFile(providerPath, 'utf8')
+
+    expect(source).toContain('capture_pageview: false')
+    expect(source).toContain('capture_pageleave: false')
+    expect(source).toContain('get_current_url: redactInviteUrl')
+    expect(source).toContain("url.pathname.startsWith('/join/')")
+    expect(source).toContain('/join/[invite]')
+  })
+})

apps/web/app/PostHogPageView.tsx

@@ -10,6 +10,10 @@ function PostHogPageViewInner() {
   const posthog = usePostHog()
 
   useEffect(() => {
+    // Invite codes are bearer-like tokens. The join route emits its own
+    // aggregate-only event, so it must never produce a URL-bearing page view.
+    if (pathname?.startsWith('/join/')) return
+
     if (pathname && posthog) {
       let url = window.origin + pathname
       if (searchParams.toString()) {

apps/web/app/providers.tsx

@@ -4,14 +4,25 @@ import posthog from 'posthog-js'
 import { PostHogProvider as PHProvider } from 'posthog-js/react'
 import { useEffect } from 'react'
 
+function redactInviteUrl(defaultUrl: string): string {
+  const url = new URL(defaultUrl)
+
+  if (url.pathname.startsWith('/join/')) {
+    return `${url.origin}/join/[invite]`
+  }
+
+  return defaultUrl
+}
+
 export function PostHogProvider({ children }: { children: React.ReactNode }) {
   useEffect(() => {
     if (typeof window !== 'undefined' && process.env.NEXT_PUBLIC_POSTHOG_KEY) {
       posthog.init(process.env.NEXT_PUBLIC_POSTHOG_KEY, {
         api_host: process.env.NEXT_PUBLIC_POSTHOG_HOST || 'https://eu.i.posthog.com',
         person_profiles: 'identified_only',
-        capture_pageview: false, // We'll capture pageviews manually for better control
+        capture_pageview: false,
-        capture_pageleave: true,
+        capture_pageleave: false,
+        get_current_url: redactInviteUrl,
       })
     }
   }, [])