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)

script.js

@@ -846,7 +846,8 @@ var si = 0,
                                 requirements: requirements,
                                 area: 'quote'
                             }))
-                        }).then(function() {
+                        }).then(function(r) {
+                            if (!r.ok) throw new Error('bad status ' + r.status);
                             customQuoteForm.style.display = 'none';
                             document.getElementById('customQuoteSuccess').style.display = 'block';
                             submitBtn.textContent = 'Submit Request';
@@ -904,7 +905,8 @@ var si = 0,
                             requirements: text,
                             area: 'message'
                         }))
-                    }).then(function () {
+                    }).then(function (r) {
+                        if (!r.ok) throw new Error('bad status ' + r.status);
                         form.reset();
                         submitBtn.disabled = false;
                         showStatus("Thanks! We'll get back to you shortly.", false);