fix(web): keep the dedicated-environment link on a custom Cloud banner (#2760)

* fix(web): keep the dedicated-environment link on a custom Cloud banner

The Cloud banner can carry per-language copy, but the custom-copy branch
rendered that text alone: everything else in the banner swaps the built-in
message for an override so the operator can say what is actually happening,
and doing so silently dropped the link to the dedicated environment -- the only
destination that turns a warning into an upgrade.

Render the dedicated link after the override when show_links is on, using new
cta_dedicated copy in every locale so the second half of the sentence reads as
a call to action rather than repeating the environment name.

* test(web): expect the new banner CTA copy in every locale

web/src/components/CloudBanner.tsx

@@ -178,7 +178,19 @@ export function CloudBanner() {
         <div className="flex w-full items-start gap-3">
           <span className="flex-1">
             {customCopy ? (
-              customCopy
+              <>
+                {customCopy}{' '}
+                {banner.show_links && (
+                  <a
+                    href={banner.dedicated_url}
+                    target="_blank"
+                    rel="noopener noreferrer"
+                    className="font-medium underline hover:opacity-80"
+                  >
+                    {t('cloud_banner.cta_dedicated')}
+                  </a>
+                )}
+              </>
             ) : (
               <>
                 {t('cloud_banner.message')}{' '}