[Bug Fix] MCP: point install instructions at canonical www host (#492)

rubyui.com/mcp 301-redirects to www.rubyui.com/mcp (see #481). Every
place we hand out the MCP endpoint — the docs page's copy-pasteable
snippets, the get_project_registries tool response, and the README —
still pointed at the bare domain, so copying the "installation"
command sent clients through a mid-handshake redirect that trips some
MCP implementations. Point all of them at the final destination
directly.

Author: djalmaaraujo

docs/app/views/docs/mcp.rb

@@ -25,7 +25,7 @@ def view_template
         # Claude Code
         div(class: "space-y-2") do
           Heading(level: 3) { "Claude Code" }
-          Codeblock("claude mcp add --transport http ruby-ui https://rubyui.com/mcp", syntax: :shell, clipboard: true)
+          Codeblock("claude mcp add --transport http ruby-ui https://www.rubyui.com/mcp", syntax: :shell, clipboard: true)
         end
 
         # Cursor
@@ -118,7 +118,7 @@ def cursor_config_json
     <<~JSON
       {
         "mcpServers": {
-          "ruby-ui": { "url": "https://rubyui.com/mcp" }
+          "ruby-ui": { "url": "https://www.rubyui.com/mcp" }
         }
       }
     JSON
@@ -132,7 +132,7 @@ def zed_config_json
     <<~JSON
       {
         "context_servers": {
-          "ruby-ui": { "source": "http", "url": "https://rubyui.com/mcp" }
+          "ruby-ui": { "source": "http", "url": "https://www.rubyui.com/mcp" }
         }
       }
     JSON

mcp/README.md

@@ -2,7 +2,7 @@
 
 Model Context Protocol (MCP) server for [Ruby UI](https://rubyui.com). Lets AI coding agents discover, inspect, and install Ruby UI components.
 
-Hosted endpoint: **https://rubyui.com/mcp**
+Hosted endpoint: **https://www.rubyui.com/mcp**
 
 ## Tools
 

mcp/lib/ruby_ui/mcp/tools/get_project_registries.rb

@@ -10,7 +10,7 @@ def call(**)
           {
             registries: [{
               name: "ruby_ui",
-              url: "https://rubyui.com/mcp",
+              url: "https://www.rubyui.com/mcp",
               description: "Ruby UI components for Phlex + Rails."
             }]
           }