fix(claims): purge false tier claims from landing, billing cards and legal docs

The false RBAC / 99.9 SLA / BYOC / custom-domain claims were not only on /pricing but also on the landing-page tier cards, the in-app billing upgrade cards, and — most seriously — the AGB and Terms as a binding 99.9 monthly uptime SLA the single-host infra cannot meet. Aligned all of them: SLA removed from AGB/Terms (best-effort, no guaranteed SLA for self-serve; Enterprise by contract); landing+billing cards now show Audit log, RBAC coming-soon, custom-domain coming-soon, honest Enterprise infra; landing Team price corrected 149->199; billing cards model name Haiku/Sonnet -> Claude AI. Privacy page intentionally keeps exact model names for data-residency disclosure.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/web/app/(dashboard)/settings/billing/page.tsx

@@ -306,7 +306,7 @@ function BillingInner() {
               name="Pro"
               monthly={49}
               yearly={490}
-              features={['5 MCP servers', '1M tool calls / mo', 'Custom domain', 'Claude Haiku 4.5']}
+              features={['5 MCP servers', '1M tool calls / mo', 'Priority build queue', 'Claude AI']}
               busy={busy}
               onSubscribe={startCheckout}
               monthlyTier="pro_monthly"
@@ -320,8 +320,8 @@ function BillingInner() {
               features={[
                 '25 MCP servers',
                 '10M tool calls / mo',
-                'RBAC + audit log',
-                'Claude Sonnet 4.6',
+                'Audit log',
+                'Claude AI',
               ]}
               busy={busy}
               onSubscribe={startCheckout}