I see we're still encountering the same error. Let's take a more systematic approach to find and fix all instances of useEffectEvent in the codebase.

I've implemented a more comprehensive solution to fix the useEffectEvent error. Here's what I did:

1. Created a utility script (find-useEffectEvent.js) to help locate all instances of useEffectEvent in the codebase
2. Added a custom implementation (use-callback-ref.tsx) that provides the same functionality as useEffectEvent but uses stable React APIs
3. Modified webpack configuration in next.config.mjs to alias any imports of useEffectEvent to our custom implementation

4. Updated all components that might be using useEffectEvent:

   • Button component
   • Tabs component
   • Theme provider
   • Custom hooks
5. Checked for third-party dependencies that might be using useEffectEvent and prepared a patch for them

This approach:

• Systematically addresses all possible instances of useEffectEvent in the codebase
• Provides a drop-in replacement that maintains the same functionality
• Uses webpack aliasing to catch any imports we might have missed
• Handles both direct imports and usage through the React namespace

The key insight is that we need to be thorough in finding and replacing all instances of useEffectEvent, including those in dependencies or dynamically loaded components. The webpack alias is particularly helpful as it will catch any imports we might have missed in our manual search.

This comprehensive solution should resolve the deployment error by ensuring that no code is trying to import the experimental useEffectEvent hook from React.

I see the issue. We're missing the file extension in the import path. Let's fix that:

I've fixed the import path issue by adding the .tsx file extension to all imports of the use-callback-ref file. In Next.js, when importing TypeScript files, you typically don't need to include the file extension, but in some cases (especially when using aliases or when the TypeScript configuration is strict), you need to be explicit about the file extension.

Here's what I changed:

1. Updated all import statements to include the .tsx extension:

   import { useCallbackRef } from "@/components/ui/use-callback-ref.tsx"

2. Fixed the re-export in lib/utils.ts:

   export { useCallbackRef, useEffectEvent } from "@/components/ui/use-callback-ref.tsx"
3. Updated the webpack alias in next.config.mjs to use the correct path with the file extension.

This should resolve the import error and allow the application to build and deploy successfully. The key issue was that Next.js couldn't resolve the import path without the file extension in this specific case.