🛡️ fix: Enhance File Upload Security & Error Handling (#4705)

* fix: sanitize filename in multer storage callback

* fix: ensure temporary image upload file is deleted after processing

* fix: prevent cleanup flag from being set to false before actually deleted

* refactor: user avatar, typing, use 'file' for formData instead of 'input', add disk storage, use localization

* fix: update Avatar component to include image dimensions in formData and refactor editor reference type

* fix: refactor avatar upload handling to use fs for file reading and enhance file validation

* fix: ensure temporary image upload file is deleted after processing

* fix: refactor avatar upload routes and handlers for agents and assistants, improve file handling and validation

* fix: improve audio file validation and cleanup

* fix: add filename sanitization utility and integrate it into multer storage configuration

* fix: update group project ID check for null and refactor delete prompt group response type

* fix: invalid access control for deleting prompt groups

* fix: add error handling and logging to checkBan middleware

* fix: catch conversation parsing errors

* chore: revert unnecessary height and width parameters from avatar upload

* chore: update librechat-data-provider version to 0.7.55

* style: ensure KaTeX can spread across visible space

client/src/components/Chat/Messages/Content/MessageContent.tsx

@@ -27,7 +27,7 @@ export const ErrorMessage = ({
     return (
       <Suspense
         fallback={
-          <div className="text-message mb-[0.625rem] flex min-h-[20px] flex-col items-start gap-3 overflow-x-auto">
+          <div className="text-message mb-[0.625rem] flex min-h-[20px] flex-col items-start gap-3 overflow-visible">
             <div className="markdown prose dark:prose-invert light w-full break-words dark:text-gray-100">
               <div className="absolute">
                 <p className="submitting relative">