feat: add configurable AI disclaimer below chat messages

[Dornheim-Tech]

Summary

We add an optional interface.aiDisclaimer setting that renders a small, unobtrusive disclaimer note below the chat messages (e.g. "AI can make mistakes, so you should verify the answers."). The setting accepts either an i18n key (such as the provided com_ui_ai_disclaimer) or arbitrary plain text, and is disabled by default — when unset or empty, nothing is rendered and existing deployments are unaffected.

Motivation:

For our company deployment of LibreChat we needed a persistent AI disclaimer that stays visible while chatting — a common requirement, especially in corporate or regulated environments. The only natural place for such a note today is the footer, which did not work for us for two reasons:

• The footer is quite limited in space, and we already use it for other content (company link, "all rights reserved", legal notices), so a disclaimer would compete with that content.
• More importantly, the footer is not visible on mobile devices, so mobile users would never see the disclaimer at all.

Rendering the note directly below the chat messages keeps it visible on all screen sizes without occupying the footer. We have been running this change in our deployment and are contributing it upstream as we believe it is useful for other installations as well.

Changes:

• New ChatDisclaimer component (client/src/components/Chat/Messages/ChatDisclaimer.tsx), rendered at the bottom of MessagesView. It resolves the configured value as an i18n key with the raw value as fallback, so plain text works transparently. Marked as role="note", pointer-events-none and excluded from text selection.
• New optional aiDisclaimer field in the interface config schema (packages/data-provider/src/config.ts), wired through loadDefaultInterface (packages/data-schemas/src/app/interface.ts).
• New English translation key com_ui_ai_disclaimer (English only — other locales are handled by the translation automation).
• Documented the new option in librechat.example.yaml.

Change Type

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Testing

We tested the change in our Docker Compose based deployment as follows:

1. Start LibreChat without setting interface.aiDisclaimer → no disclaimer is rendered (default behavior unchanged).
2. Set aiDisclaimer: 'com_ui_ai_disclaimer' in librechat.yaml under interface: → the localized default disclaimer appears below the chat messages, in the language of the UI.
3. Set aiDisclaimer: 'Some custom plain text' → the plain text is shown verbatim.
4. Set aiDisclaimer: '' (empty/whitespace) → nothing is rendered.
5. Verified on desktop and mobile viewports that the note stays visible below the conversation, where the footer would not be visible on mobile.

Test Configuration:

interface:
  aiDisclaimer: 'com_ui_ai_disclaimer'

Checklist

• My code adheres to this project's style guidelines
• I have performed a self-review of my own code
• My changes do not introduce new warnings
• Local unit tests pass with my changes

[afuetterer]

This is great. We would use that ai disclaimer as well at our institute!