Add PostHog web server logs

[willwearing]

Summary

• Route Next.js server logs through PostHog's OTel logs endpoint
• Avoid using the browser-only /ingest proxy for server-side PostHog calls
• Log auth callback and confirmation failures with after-response flushing

Tests

• /Users/will/.bun/bin/bun x vitest run src/tests/lib/posthog-server-config.test.ts
• /Users/will/.bun/bin/bun x tsc --noEmit
• /Users/will/.bun/bin/bun run lint
• /Users/will/.bun/bin/bun run build
• /Users/will/.bun/bin/bun x vitest run

[vercel]

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Project	Deployment	Actions	Updated (UTC)
graspful	Ready	Preview, Comment	May 5, 2026 5:26pm