Add /server-components route, controller action, and view

- rsc_payload_route in routes.rb enables the Flight protocol endpoint
  for client-side RSC payload fetching.
- get "server-components" route maps to pages#server_components.
- View uses prerender: false (RSC components are streamed via the
  payload route, not traditional SSR prerender) and
  auto_load_bundle: false (ServerComponentsPage is not in
  ror_components/, so auto-discovery doesn't find its pack).
- trace: Rails.env.development? gates server-timing headers to dev.

Reference: Justin's PR 723 commits 4d09e13 + 0d8d75a.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: ihabadham

app/controllers/pages_controller.rb

@@ -38,6 +38,8 @@ def simple; end
 
   def rescript; end
 
+  def server_components; end
+
   private
 
   def set_comments

app/views/pages/server_components.html.erb

@@ -0,0 +1,5 @@
+<%= react_component("ServerComponentsPage",
+    prerender: false,
+    auto_load_bundle: false,
+    trace: Rails.env.development?,
+    id: "ServerComponentsPage-react-component-0") %>

config/routes.rb

@@ -1,12 +1,15 @@
 # frozen_string_literal: true
 
 Rails.application.routes.draw do
+  rsc_payload_route
+
   # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
 
   # Serve websocket cable requests in-process
   # mount ActionCable.server => '/cable'
 
   root "pages#index"
+  get "server-components", to: "pages#server_components"
 
   get "simple", to: "pages#simple"
   get "rescript", to: "pages#rescript"