Gate analytics on consent and fix Matomo SPA page views

[TechHutTV]

Description

Align the documentation site's analytics behavior with the updated privacy and cookie-consent model.

Matomo and Google Tag Manager now load only after a visitor explicitly accepts analytics cookies. Visitors can reopen Cookie Settings from the footer, and withdrawing consent removes known tracking cookies before reloading the site without analytics scripts.

This also changes Matomo from cookie-only consent to full tracking consent and adds an explicit SPA page-view event after Next.js finishes updating the URL and document title. This prevents Matomo from associating a new URL with the previous page's title during client-side navigation.

Changes

• Load Matomo Tag Manager only after analytics consent is accepted.
• Load Google Tag Manager only after analytics consent is accepted.
• Keep analytics available during local development so the consent flow can be tested locally.
• Replace Matomo cookie-only consent with full tracking consent using requireConsent and setConsentGiven.
• Emit mtm.SpaPageView after client-side route changes so Matomo receives the current URL and page title together.
• Preserve the initial hard-load page view for the Matomo container's existing PageView trigger.
• Store accepted and declined choices for 180 days.
• Resolve stored consent after hydration so analytics remains disabled while the visitor's choice is loading.
• Remove known Matomo, Google, HubSpot, Hotjar, and Microsoft Clarity tracking cookies when consent is withdrawn.
• Revoke Matomo consent, delete Matomo cookies, and reload after an accepted visitor changes their choice to declined.
• Add a persistent Cookie Settings control to the footer.
• Move Google Tag Manager out of _document so it can be mounted conditionally from the consent-aware application tree.

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Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: ac1f9644-d556-4a59-be2c-856fc64e8d08

📥 Commits

Reviewing files that changed from the base of the PR and between ae35274 and f356a4e.

📒 Files selected for processing (6)

• src/components/Footer.jsx
• src/components/GoogleTagManager.jsx
• src/components/Matomo.jsx
• src/components/cookie-consent/CookieConsentProvider.jsx
• src/pages/_app.jsx
• src/pages/_document.jsx

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/privacy-cookie-consent-matomo

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