💬 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>

client/src/components/SidePanel/Builder/ActionsPanel.tsx

@@ -40,7 +40,8 @@ export default function ActionsPanel({
     },
     onError(error) {
       showToast({
-        message: (error as Error)?.message ?? localize('com_assistants_delete_actions_error'),
+        message:
+          (error as Error | undefined)?.message ?? localize('com_assistants_delete_actions_error'),
         status: 'error',
       });
     },
@@ -127,7 +128,7 @@ export default function ActionsPanel({
                   <div className="absolute right-0 top-6">
                     <button
                       type="button"
-                      disabled={!assistant_id || !action.action_id}
+                      disabled={!(assistant_id ?? '') || !action.action_id}
                       className="btn btn-neutral border-token-border-light relative h-9 rounded-lg font-medium"
                     >
                       <TrashIcon className="text-red-500" />
@@ -145,16 +146,17 @@ export default function ActionsPanel({
                   }
                   selection={{
                     selectHandler: () => {
-                      if (!assistant_id) {
+                      const currentId = assistant_id ?? '';
+                      if (!currentId) {
                         return showToast({
                           message: 'No assistant_id found, is the assistant created?',
                           status: 'error',
                         });
                       }
                       deleteAction.mutate({
-                        model: assistantMap[endpoint][assistant_id].model,
+                        model: assistantMap?.[endpoint][currentId].model ?? '',
                         action_id: action.action_id,
-                        assistant_id,
+                        assistant_id: currentId,
                         endpoint,
                       });
                     },