Revert be_positive back to be > 0 for compatibility

The be_positive matcher is not available in the RSpec version used with
generator_spec test cases. It causes a method_missing error when used
within GeneratorSpec::TestCase context.

Reverts to the original 'be > 0' syntax which works across all RSpec
versions and test contexts. Adds RuboCop disable directive with
explanation to prevent future auto-corrections.

Fixes test failures:
- NoMethodError: undefined method 'be_positive' for GeneratorSpec::TestCase

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

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

Author: justin808

react_on_rails/spec/react_on_rails/generators/js_dependency_manager_spec.rb

@@ -2,6 +2,9 @@
 
 require_relative "../support/generator_spec_helper"
 
+# rubocop:disable Style/NumericPredicate
+# Using `be > 0` instead of `be_positive` because `be_positive` is not available
+# in the RSpec version used with generator_spec test cases (method_missing conflict)
 describe ReactOnRails::Generators::JsDependencyManager, type: :generator do
   # Create a test class that includes the module for testing
   let(:test_class) do
@@ -182,7 +185,7 @@ def errors
       result = instance.send(:install_js_dependencies)
 
       expect(result).to be(false)
-      expect(warnings.size).to be_positive
+      expect(warnings.size).to be > 0
       expect(warnings.first.to_s).to include("package_json not available")
     end
 
@@ -192,7 +195,7 @@ def errors
       result = instance.send(:install_js_dependencies)
 
       expect(result).to be(false)
-      expect(warnings.size).to be_positive
+      expect(warnings.size).to be > 0
       expect(warnings.first.to_s).to include("JavaScript dependencies installation failed")
     end
   end
@@ -265,7 +268,7 @@ def errors
 
       instance.send(:add_react_on_rails_package)
 
-      expect(warnings.size).to be_positive
+      expect(warnings.size).to be > 0
       expect(warnings.first.to_s).to include("Failed to add react-on-rails package")
     end
 
@@ -274,7 +277,7 @@ def errors
 
       instance.send(:add_react_on_rails_package)
 
-      expect(warnings.size).to be_positive
+      expect(warnings.size).to be > 0
       # When add_package catches exception, it returns false, triggering the "Failed to add" warning
       expect(warnings.first.to_s).to include("Failed to add react-on-rails package")
     end
@@ -291,7 +294,7 @@ def errors
 
       instance.send(:add_react_dependencies)
 
-      expect(warnings.size).to be_positive
+      expect(warnings.size).to be > 0
       expect(warnings.first.to_s).to include("Failed to add React dependencies")
     end
   end
@@ -307,7 +310,7 @@ def errors
 
       instance.send(:add_css_dependencies)
 
-      expect(warnings.size).to be_positive
+      expect(warnings.size).to be > 0
       expect(warnings.first.to_s).to include("Failed to add CSS dependencies")
     end
   end
@@ -336,7 +339,7 @@ def errors
 
       instance.send(:add_dev_dependencies)
 
-      expect(warnings.size).to be_positive
+      expect(warnings.size).to be > 0
       expect(warnings.first.to_s).to include("Failed to add development dependencies")
     end
   end
@@ -352,7 +355,7 @@ def errors
 
       instance.send(:add_rspack_dependencies)
 
-      expect(warnings.size).to be_positive
+      expect(warnings.size).to be > 0
       expect(warnings.first.to_s).to include("Failed to add Rspack dependencies")
     end
   end
@@ -369,7 +372,7 @@ def errors
 
       instance.send(:add_typescript_dependencies)
 
-      expect(warnings.size).to be_positive
+      expect(warnings.size).to be > 0
       expect(warnings.first.to_s).to include("Failed to add TypeScript dependencies")
     end
   end
@@ -413,7 +416,7 @@ def errors
       expect { instance.send(:setup_js_dependencies) }.not_to raise_error
 
       # Should have generated warnings for failures
-      expect(warnings.size).to be_positive
+      expect(warnings.size).to be > 0
       # But no errors that would crash the generator
       expect(errors.size).to eq(0)
     end
@@ -430,3 +433,4 @@ def errors
     end
   end
 end
+# rubocop:enable Style/NumericPredicate