fix: Full site audit — 15 critical + important issues fixed

[deepu0]

Full Site Audit — 15 Issues Fixed

🔴 Critical

1. Sitemap missing 431 experience pages — fall back to anon key when service role key unavailable at build time
2. AdSense blocking render — changed strategy from beforeInteractive to lazyOnload
3. Render-blocking Google Font — switched from link tag to next/font/google (self-hosted, zero FOUT)

🟡 Important

4. force-dynamic + revalidate conflict — removed force-dynamic so ISR works
5. Missing canonical URLs — added to 5 pages
6. No custom 404/error pages — added not-found.tsx and error.tsx
7. XSS risk — added HTML sanitizer for dangerouslySetInnerHTML
8. Author typo — fixed siteConfig.author

🟢 Nice-to-have

9-13. Footer links, tags description, security headers, console.log cleanup, sitemap logging

No breaking changes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Free

Run ID: 9e447eb6-ce87-42b6-9881-09b880dc1999

📥 Commits

Reviewing files that changed from the base of the PR and between c61fc81 and 69e2ac0.

📒 Files selected for processing (16)

• app/blog/page.tsx
• app/companies/[company]/page.tsx
• app/companies/page.tsx
• app/error.tsx
• app/interview-experience/[slug]/page.tsx
• app/interview-experience/page.tsx
• app/layout.tsx
• app/not-found.tsx
• app/sitemap.ts
• app/tags/page.tsx
• components/add-new-experience.tsx
• components/common/footer.tsx
• components/session-provider.tsx
• config/site.ts
• lib/sanitize-html.ts
• next.config.mjs

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