docs: add macOS/Windows note to DXT install

Author: aborruso

README.md

@@ -64,7 +64,7 @@ All examples below work with **both** the local installation and the hosted endp
 
 ### Claude Desktop
 
-**One-click install (Desktop Extension):**
+**One-click install (Desktop Extension):** *(macOS and Windows only)*
 
 1. [Download `ckan-mcp-server.dxt`](https://github.com/ondata/ckan-mcp-server/releases/latest/download/ckan-mcp-server.dxt)
 2. Double-click the file — Claude Desktop installs and configures it automatically

website/src/pages/index.astro

@@ -335,7 +335,7 @@ const baseUrl = '/ckan-mcp-server';
           <!-- One-click install DXT -->
           <div class="bg-white border-2 border-gray-200 overflow-hidden">
             <div class="px-6 pt-5 pb-2">
-              <div class="mono text-xs font-medium tracking-widest uppercase text-data-blue mb-3">Claude Desktop only</div>
+              <div class="mono text-xs font-medium tracking-widest uppercase text-data-blue mb-3">Claude Desktop · macOS &amp; Windows</div>
             </div>
             <div class="px-6 pb-6 flex flex-col sm:flex-row sm:items-start gap-5">
               <!-- Install dialog preview -->