fixing global search mcp

[binaryk]

Fixed

• fixing global search mcp

[what-the-diff]

PR Summary

• Updated Parameter Merging Method
  The strategy to combine different sets of data on the $mcpRequest object has been changed from merge() to replace(). This change ensures that the new data we are adding will completely substitute the old data, rather than attemptedly mixing the two together, which could lead to unexpected results.

• Modified 'Search' Input Retrieval Strategy
  The method to access the 'search' input from the $request has been changed from the input() function to the get() function. This adjustment enhances our ability to read information sent from the client side by being more ensuring and consistent.