🔧 fix: Resizable Panel Unmount Error & Code Env. File Re-Upload

[danny-avila]

Summary

• Updated react‑resizable‑panels version in client/package.json (from ^2.1.1 to ^2.1.7) following the reported unmount error
  • ref: https://github.com/bvaughn/react‑resizable‑panels/issues/372
• Modified process.js to pass the Express request object to getDownloadStream for accurate file retrieval.
• Revised the Firebase file stream function signature to include a request parameter, ensuring consistent use across strategies.
• Refactored the local file stream function to extract and validate the base path from “/uploads/” paths; constructed a secure relative file path and logged warnings for invalid paths.

Other Changes

• GoogleClient: prevent saving LibreChat feature-specific instructions to the user's custom instructions

Change Type
• [x] Bug fix (non‑breaking change which fixes an issue)

Checklist
• [x] My code adheres to this project's style guidelines.
• [x] I have performed a self‑review of my own code.
• [x] I have commented in complex areas to clarify the file path validation logic.
• [x] My changes do not introduce new warnings.
• [x] I have written tests demonstrating that my changes are effective.
• [x] Local unit tests pass with my changes.
• [x] Any changes dependent on mine have been merged and published in downstream modules.