fix: remove remaining false SDK claims from features, docs/premium, docs/api (M-2)

- features.tsx: 'JavaScript SDK & REST API' → 'REST API (260+ endpoints)'
- docs/premium: 'the JS SDK' → 'the REST API'
- docs/api: 'and the SDK' → 'and integrations'

The SDK package doesn't exist; the REST API is the correct integration surface.
Deployed to live dashcaddy.net via cPanel API with cache-busting rewrite.

src/app/docs/api/page.tsx

@@ -60,7 +60,7 @@ curl -X POST -H "Authorization: Bearer ***" \\
         </p>
         <h3>API key (Bearer token)</h3>
         <p>
-          For server-to-server automation, scripts, and the SDK, use an API key. Generate keys from
+          For server-to-server automation, scripts, and integrations, use an API key. Generate keys from
           <strong> Settings → API Keys</strong>. Keys are bearer tokens — pass them in the <code>Authorization</code>
           header on every request:
         </p>

src/app/docs/premium/page.tsx

@@ -14,7 +14,7 @@ export default function DocsPremiumPage() {
           DashCaddy's philosophy is that the day-to-day platform should be free forever. Everything you need to run
           a single host — the dashboard, the full template catalog, Caddy + DNS + TLS automation, real-time monitoring,
           Prometheus metrics, multi-user accounts with 2FA and RBAC, the Security Center, the AI Intent Router, the MCP
-          Server, the JS SDK, and backup/restore — works without a license. Premium adds four capabilities aimed at
+          Server, the REST API, and backup/restore — works without a license. Premium adds four capabilities aimed at
           teams and multi-host operators who need single sign-on, multi-container stacks, cluster orchestration, or
           fleet-wide management.
         </p>

src/app/features/page.tsx

@@ -361,7 +361,7 @@ export default function FeaturesPage() {
                   'Security Center',
                   'One-click backup & restore',
                   'AI Intent Router + MCP Server',
-                  'JavaScript SDK & REST API',
+                  'REST API (260+ endpoints)',
                   'Plugin / Extension system',
                   'i18n (5 languages, RTL)',
                   'Prometheus metrics export',