Fix Shakapacker 9.3.0 compatibility issues

- Update Capybara to >= 3.40 for Rack 3 compatibility
- Fix generator to inject shakapacker 9.3.0 instead of >= 0
- Allow Ruby >= 3.0.0, < 3.5.0 in execjs-compatible-dummy

These changes fix test failures caused by Rack::Handler removal in Rack 3
and bundler conflicts from shakapacker version mismatches during generator tests.

🤖 Generated with [Claude Code](https://claude.com/claude.code)

Co-Authored-By: Claude <[email protected]>

Author: justin808

Gemfile.development_dependencies

@@ -46,7 +46,7 @@ group :development, :test do
 end
 
 group :test do
-  gem "capybara"
+  gem "capybara", ">= 3.40"
   gem "capybara-screenshot"
   gem "coveralls", require: false
   gem "equivalent-xml"

Gemfile.lock

@@ -86,8 +86,8 @@ GEM
       minitest (>= 5.1)
       mutex_m
       tzinfo (~> 2.0)
-    addressable (2.8.6)
-      public_suffix (>= 2.0.2, < 6.0)
+    addressable (2.8.7)
+      public_suffix (>= 2.0.2, < 7.0)
     amazing_print (1.6.0)
     ast (2.4.2)
     base64 (0.2.0)
@@ -171,10 +171,10 @@ GEM
       net-pop
       net-smtp
     marcel (1.0.4)
-    matrix (0.4.2)
+    matrix (0.4.3)
     method_source (1.1.0)
     mini_mime (1.1.5)
-    mini_portile2 (2.8.7)
+    mini_portile2 (2.8.9)
     minitest (5.24.1)
     msgpack (1.7.2)
     mutex_m (0.2.0)
@@ -188,7 +188,7 @@ GEM
     net-smtp (0.5.0)
       net-protocol
     nio4r (2.7.3)
-    nokogiri (1.16.6)
+    nokogiri (1.18.10)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     ostruct (0.6.1)
@@ -213,16 +213,16 @@ GEM
       pry (>= 0.12.0)
     psych (5.1.2)
       stringio
-    public_suffix (5.0.5)
+    public_suffix (6.0.2)
     puma (6.4.2)
       nio4r (~> 2.0)
-    racc (1.8.0)
-    rack (3.1.4)
+    racc (1.8.1)
+    rack (3.2.4)
     rack-proxy (0.7.7)
       rack
     rack-session (2.0.0)
       rack (>= 3.0.0)
-    rack-test (2.1.0)
+    rack-test (2.2.0)
       rack (>= 1.3)
     rackup (2.1.0)
       rack (>= 3)
@@ -263,7 +263,7 @@ GEM
       ffi (~> 1.0)
     rdoc (6.7.0)
       psych (>= 4.0.0)
-    regexp_parser (2.9.2)
+    regexp_parser (2.11.3)
     reline (0.5.9)
       io-console (~> 0.5)
     rexml (3.2.7)
@@ -407,7 +407,7 @@ DEPENDENCIES
   amazing_print
   benchmark
   bootsnap
-  capybara
+  capybara (>= 3.40)
   capybara-screenshot
   coveralls
   debug

lib/generators/react_on_rails/install_generator.rb

@@ -264,7 +264,7 @@ def ensure_shakapacker_in_gemfile
         return if shakapacker_in_gemfile?
 
         puts Rainbow("📝 Adding Shakapacker to Gemfile...").yellow
-        success = system("bundle add shakapacker --strict")
+        success = system("bundle add shakapacker --version=9.3.0")
         return if success
 
         handle_shakapacker_gemfile_error
@@ -308,7 +308,7 @@ def handle_shakapacker_gemfile_error
           • Gemfile permissions
 
           Please try manually:
-              bundle add shakapacker --strict
+              bundle add shakapacker --version=9.3.0
 
           Then re-run: rails generate react_on_rails:install
         MSG

packages/react-on-rails-pro/src/RSCProvider.tsx

@@ -17,7 +17,7 @@ import ReactClient from 'react/index.js';
 import type { ClientGetReactServerComponentProps } from './getReactServerComponent.client.ts';
 import { createRSCPayloadKey } from './utils.ts';
 
-const React = ReactClient as typeof import('react');
+const React = ReactClient;
 
 type RSCContextType = {
   getComponent: (componentName: string, componentProps: unknown) => Promise<ReactNode>;

packages/react-on-rails-pro/src/RSCRoute.tsx

@@ -19,7 +19,7 @@ import ReactClient from 'react/index.js';
 import { useRSC } from './RSCProvider.tsx';
 import { ServerComponentFetchError } from './ServerComponentFetchError.ts';
 
-const React = ReactClient as typeof import('react');
+const React = ReactClient;
 
 /**
  * Error boundary component for RSCRoute that adds server component name and props to the error

react_on_rails_pro/spec/execjs-compatible-dummy/Gemfile

@@ -2,7 +2,7 @@
 
 source "https://rubygems.org"
 
-ruby "3.3.7"
+ruby ">= 3.0.0", "< 3.5.0"
 
 # Bundle edge Rails instead: gem "rails", github: "rails/rails", branch: "main"
 gem "rails", "~> 7.1", ">= 7.1.3.2"

spec/dummy/Gemfile.lock

@@ -100,11 +100,11 @@ GEM
       msgpack (~> 1.2)
     builder (3.3.0)
     byebug (11.1.3)
-    capybara (3.39.2)
+    capybara (3.40.0)
       addressable
       matrix
       mini_mime (>= 0.1.3)
-      nokogiri (~> 1.8)
+      nokogiri (~> 1.11)
       rack (>= 1.6.0)
       rack-test (>= 0.6.3)
       regexp_parser (>= 1.5, < 3.0)
@@ -173,7 +173,7 @@ GEM
       net-pop
       net-smtp
     marcel (1.1.0)
-    matrix (0.4.2)
+    matrix (0.4.3)
     method_source (1.0.0)
     mini_mime (1.1.5)
     mini_portile2 (2.8.9)
@@ -223,7 +223,7 @@ GEM
     puma (6.4.0)
       nio4r (~> 2.0)
     racc (1.8.1)
-    rack (3.2.1)
+    rack (3.2.4)
     rack-proxy (0.7.7)
       rack
     rack-session (2.1.1)
@@ -270,7 +270,7 @@ GEM
     rdoc (6.14.2)
       erb
       psych (>= 4.0.0)
-    regexp_parser (2.8.1)
+    regexp_parser (2.11.3)
     reline (0.6.2)
       io-console (~> 0.5)
     rexml (3.2.6)
@@ -409,7 +409,7 @@ DEPENDENCIES
   amazing_print
   benchmark
   bootsnap
-  capybara
+  capybara (>= 3.40)
   capybara-screenshot
   coveralls
   debug