💬 feat: assistant conversation starter (#3699)

* feat: initial UI convoStart

* fix: ConvoStarter UI

* fix: convoStarters bug

* feat: Add input field focus on conversation starters

* style: conversation starter UI update

* feat: apply fixes for starters

* style: update conversationStarters UI and fixed typo

* general UI update

* feat: Add onClick functionality to ConvoStarter component

* fix: quick fix test

* fix(AssistantSelect): remove object check

* fix: updateAssistant `conversation_starters` var

* chore: remove starter autofocus

* fix: no empty conversation starters, always show input, use Constants value for max count

* style: Update defaultTextPropsLabel styles, for a11y placeholder

* refactor: Update ConvoStarter component styles and class names for a11y and theme

* refactor: convostarter, move plus button to within persistent element

* fix: types

* chore: Update landing page assistant description styling with theming

* chore: assistant types

* refactor: documents routes

* refactor: optimize conversation starter mutations/queries

* refactor: Update listAllAssistants return type to Promise<Array<Assistant>>

* feat: edit existing starters

* feat(convo-starters): enhance ConvoStarter component and add animations

    - Update ConvoStarter component styling for better visual appeal
    - Implement fade-in animation for smoother appearance
    - Add hover effect with background color change
    - Improve text overflow handling with line-clamp and text-balance
    - Ensure responsive design for various screen sizes

* feat(assistant): add conversation starters to assistant builder

- Add localization strings for conversation starters
- Update mobile.css with shake animation for max starters reached
- Enhance user experience with tooltips and dynamic input handling

* refactor: select specific fields for assistant documents fetch

* refactor: remove endpoint query key, fetch all assistant docs for now, add conversation_starters to v1 methods

* refactor: add document filters based on endpoint config

* fix: starters not applied during creation

* refactor: update AssistantSelect component to handle undefined lastSelectedModels

---------

Co-authored-by: Danny Avila <danny@librechat.ai>

api/server/routes/assistants/v1.js

@@ -1,6 +1,7 @@
 const multer = require('multer');
 const express = require('express');
 const controllers = require('~/server/controllers/assistants/v1');
+const documents = require('./documents');
 const actions = require('./actions');
 const tools = require('./tools');
 
@@ -20,6 +21,13 @@ router.use('/actions', actions);
  */
 router.use('/tools', tools);
 
+/**
+ * Create an assistant.
+ * @route GET /assistants/documents
+ * @returns {AssistantDocument[]} 200 - application/json
+ */
+router.use('/documents', documents);
+
 /**
  * Create an assistant.
  * @route POST /assistants
@@ -61,13 +69,6 @@ router.delete('/:id', controllers.deleteAssistant);
  */
 router.get('/', controllers.listAssistants);
 
-/**
- * Returns a list of the user's assistant documents (metadata saved to database).
- * @route GET /assistants/documents
- * @returns {AssistantDocument[]} 200 - success response - application/json
- */
-router.get('/documents', controllers.getAssistantDocuments);
-
 /**
  * Uploads and updates an avatar for a specific assistant.
  * @route POST /avatar/:assistant_id