fix: Address code review feedback and fix CI issues

- Fix critical performance.now() fallback bug (was property instead of method)
- Fix component size calculation (use "chars" instead of misleading "kb")
- Add CHANGELOG entry for smart error messages feature
- Fix test to enable Rainbow coloring for ANSI escape sequence assertion
- Verify all files end with newline character

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

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

Author: justin808

CHANGELOG.md

@@ -31,6 +31,8 @@ Changes since the last non-beta release.
 
 - **Improved Error Messages**: Error messages for version mismatches and package configuration issues now include package-manager-specific installation commands (npm, yarn, pnpm, bun). [PR #1881](https://github.com/shakacode/react_on_rails/pull/1881) by [AbanoubGhadban](https://github.com/AbanoubGhadban).
 
+- **Smart Error Messages with Actionable Solutions**: Added intelligent Ruby-side error handling with context-aware, actionable solutions for common issues. Features include fuzzy matching for component name typos, environment-specific debugging suggestions, color-coded error formatting, and detailed troubleshooting guides for component registration, auto-bundling, hydration mismatches, server rendering errors, and Redux store issues. See the [Improved Error Messages guide](docs/guides/improved-error-messages.md) for details. [PR 1934](https://github.com/shakacode/react_on_rails/pull/1934) by [justin808](https://github.com/justin808).
+
 - **Improved RSC Payload Error Handling**: Errors that happen during generation of RSC payload are transferred properly to rails side and logs the error message and stack. [PR #1888](https://github.com/shakacode/react_on_rails/pull/1888) by [AbanoubGhadban](https://github.com/AbanoubGhadban).
 
 #### Changed

packages/react-on-rails/src/base/client.ts

@@ -186,7 +186,7 @@ Fix: Use only react-on-rails OR react-on-rails-pro, not both.`);
     register(components: Record<string, ReactComponentOrRenderFunction>): void {
       if (this.options.debugMode || this.options.logComponentRegistration) {
         // Use performance.now() if available, otherwise fallback to Date.now()
-        const perf = typeof performance !== 'undefined' ? performance : { now: Date.now };
+        const perf = typeof performance !== 'undefined' ? performance : { now: () => Date.now() };
         const startTime = perf.now();
         const componentNames = Object.keys(components);
         console.log(
@@ -205,7 +205,7 @@ Fix: Use only react-on-rails OR react-on-rails-pro, not both.`);
           componentNames.forEach((name) => {
             const component = components[name];
             const size = component.toString().length;
-            console.log(`[ReactOnRails] ✅ Registered: ${name} (~${(size / 1024).toFixed(1)}kb)`);
+            console.log(`[ReactOnRails] ✅ Registered: ${name} (~${(size / 1024).toFixed(1)} chars)`);
           });
         }
       } else {

spec/react_on_rails/smart_error_spec.rb

@@ -151,9 +151,13 @@ module ReactOnRails
       end
 
       it "includes colored output markers" do
+        # Enable Rainbow coloring for this test
+        Rainbow.enabled = true
         message = error.message
         # Rainbow adds ANSI color codes
         expect(message).to match(/\e\[/) # ANSI escape sequence
+      ensure
+        Rainbow.enabled = false
       end
     end