[grade=pending] fix: update language count from 5 to 31 across marketing site

- Homepage hero: 5 → 31 languages incl. Arabic (RTL)
- Homepage integrations section: 5 → 31 languages, RTL
- Features page: 5 → 31 languages in description and feature list
- Docs/premium: Internationalization (5 → 31 languages)
- Pricing: i18n — 5 → 31 languages

The DC-077 i18n system expanded from 5 to 31 languages.

src/app/features/page.tsx

@@ -109,7 +109,7 @@ export default function FeaturesPage() {
       id: 'developer-platform',
       title: 'Developer Platform',
       description:
-        'DashCaddy isn\'t just a UI—it\'s a platform. A full REST API with JSON endpoints, a plugin/extension system for custom workflows, and internationalization across 5 languages including full RTL support.',
+        'DashCaddy isn\'t just a UI—it\'s a platform. A full REST API with JSON endpoints, a plugin/extension system for custom workflows, and internationalization across 31 languages including full RTL support.',
       icon: '🛠️',
       features: [
         { icon: '🌐', label: 'REST API (JSON, MCP protocol)' },
@@ -363,7 +363,7 @@ export default function FeaturesPage() {
                   'AI Intent Router + MCP Server',
                   'REST API (260+ endpoints)',
                   'Plugin / Extension system',
-                  'i18n (5 languages, RTL)',
+                  'i18n (31 languages, RTL)',
                   'Prometheus metrics export',
                 ].map((item, i) => (
                   <li key={i} className="flex items-start gap-3">