fix: repair contact flow and buy flow targets

- Buy Now product IDs aligned to the Odoo shop (54/55/56), matching odoo/upsell.html
- support.html contact form: rewire from dead ODOO4projects.com/website/form endpoint to n8n CRM webhook; remove /web/csrf_token prefetch; show success only on res.ok (previously always showed 'submitted' even when nothing was delivered)
- /contactus links (footer nav, Schema contactPoint, order widget fallback, trial email) retargeted to support.html#contact; canonical/og:url corrected to /support.html
- Custom Quote and footer contact handlers hardened with res.ok checks
- buyNow basket target verified: 20.odoo4projects.com/shop/post_basket (200)

PRODUCT.md

@@ -24,7 +24,7 @@ Enterprise-grade Odoo Community hosting without the enterprise price tag. Commun
 
 - Static site (index.html, support.html, legal.html, blog/) deployed via git push to git.odoo4projects.com; auto-deploys on every change.
 - Order flow: inline order widget on the homepage opens Stripe checkout; coupon FREE TRIAL = 1 month free; yearly billing saves roughly 8-10%; "Satisfied or reimbursed" guarantee; server location chosen at checkout (US, Brazil, India, Australia, Netherlands, UK).
-- Support: AI support bot (agent.js from static.odoo4projects.com) plus human team; email support@odoo4projects.com; /contactus route.
+- Support: AI support bot (agent.js from static.odoo4projects.com) plus human team; email support@odoo4projects.com; contact form on support.html#contact.
 - Blog with guides and news (10 posts); homepage renders it with search and pagination.
 
 ## Capabilities and Constraints