feat: enterprise pricing shows "Request Quote" linking to interest form

Enterprise plan no longer displays a fixed price. Instead it shows
"Request Quote" and the CTA opens the interest form on hoaledgeriq.com
in a new tab to capture leads for custom quotes.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/pages/pricing/PricingPage.tsx

@@ -47,11 +47,12 @@ const plans = [
   {
     id: 'enterprise',
     name: 'Enterprise',
-    price: '$199',
+    price: 'Custom',
-    period: '/month',
+    period: '',
     description: 'For large communities and management firms',
     icon: IconCrown,
     color: 'orange',
+    externalUrl: 'https://www.hoaledgeriq.com/#preview-signup',
     features: [
       { text: 'Unlimited units', included: true },
       { text: 'Everything in Professional', included: true },
@@ -162,10 +163,10 @@ export function PricingPage() {
               </Group>
 
               <Group align="baseline" gap={4}>
-                <Text fw={800} size="xl" ff="monospace" style={{ fontSize: 36 }}>
+                <Text fw={800} size="xl" ff="monospace" style={{ fontSize: plan.externalUrl ? 28 : 36 }}>
-                  {plan.price}
+                  {plan.externalUrl ? 'Request Quote' : plan.price}
                 </Text>
-                <Text size="sm" c="dimmed">{plan.period}</Text>
+                {plan.period && <Text size="sm" c="dimmed">{plan.period}</Text>}
               </Group>
 
               <List spacing="xs" size="sm" center>
@@ -193,10 +194,14 @@ export function PricingPage() {
                 size="md"
                 color={plan.color}
                 variant={plan.popular ? 'filled' : 'light'}
-                loading={loading === plan.id}
+                loading={!plan.externalUrl ? loading === plan.id : false}
-                onClick={() => handleSelectPlan(plan.id)}
+                onClick={() =>
+                  plan.externalUrl
+                    ? window.open(plan.externalUrl, '_blank', 'noopener')
+                    : handleSelectPlan(plan.id)
+                }
               >
-                Get Started
+                {plan.externalUrl ? 'Request Quote' : 'Get Started'}
               </Button>
             </Stack>
           </Card>