✨ feat: Agent Panel UI Enhancements (#7800)

* feat: add MCP Panel to Agent Builder

- Add MCP server panel and configuration UI
- Implement MCP input forms and tool lists
- Add MCP icon and metadata support
- Integrate MCP with agent configuration
- Add localization support for MCP features
- Refactor components for better reusability
- Update types and add MCP-related mutations
- Fix small issues with Actions and AgentSelect
- Refactor AgentPanelSwitch and related components to use new
  AgentPanelContext to reduce prop drilling

* chore: import order

* chore: clean up import statements and unused var in ActionsPanel component

* refactor: AgentPanelContext with actions query, remove unnecessary `actions` state

- Added actions query using `useGetActionsQuery` to fetch actions based on the current agent ID.
- Removed now unused `setActions` state and related logic from `AgentPanelContext` and `AgentPanelSwitch` components.
- Updated `AgentPanelContextType` to reflect the removal of `setActions`.

* chore: re-order import statements in AgentConfig component

* chore: re-order import statements in ModelPanel component

* chore: update ModelPanel props to consolidated props to avoid passing unnecessary props

* chore: update import statements in Providers index file to include ToastProvider and AgentPanelContext exports

* chore: clean up import statements in VersionPanel component

* refactor: streamline AgentConfig and AgentPanel components

- Consolidated props in AgentConfig to only include necessary fields.
- Updated AgentPanel to remove unused state and props, enhancing clarity and maintainability.
- Reorganized import statements for better structure and readability.

* refactor: replace default agent form values with utility function

- Updated AgentsProvider, AgentPanel, AgentSelect, and DeleteButton components to use getDefaultAgentFormValues utility function instead of directly importing defaultAgentFormValues.
- Enhanced the initialization of agent forms by incorporating localStorage values for model and provider in the new utility function.

* chore: comment out rendering MCPSection

---------

Co-authored-by: Dustin Healy <54083382+dustinhealy@users.noreply.github.com>

client/src/components/SidePanel/Agents/ModelPanel.tsx

@@ -1,27 +1,28 @@
+import keyBy from 'lodash/keyBy';
 import React, { useMemo, useEffect } from 'react';
 import { ChevronLeft, RotateCcw } from 'lucide-react';
 import { useFormContext, useWatch, Controller } from 'react-hook-form';
+import { componentMapping } from '~/components/SidePanel/Parameters/components';
 import {
   alternateName,
   getSettingsKeys,
+  LocalStorageKeys,
   SettingDefinition,
   agentParamSettings,
 } from 'librechat-data-provider';
 import type * as t from 'librechat-data-provider';
 import type { AgentForm, AgentModelPanelProps, StringOption } from '~/common';
-import { componentMapping } from '~/components/SidePanel/Parameters/components';
 import ControlCombobox from '~/components/ui/ControlCombobox';
 import { useGetEndpointsQuery } from '~/data-provider';
 import { getEndpointField, cn } from '~/utils';
 import { useLocalize } from '~/hooks';
 import { Panel } from '~/common';
-import keyBy from 'lodash/keyBy';
 
 export default function ModelPanel({
-  setActivePanel,
   providers,
+  setActivePanel,
   models: modelsData,
-}: AgentModelPanelProps) {
+}: Pick<AgentModelPanelProps, 'models' | 'providers' | 'setActivePanel'>) {
   const localize = useLocalize();
 
   const { control, setValue } = useFormContext<AgentForm>();
@@ -50,6 +51,8 @@ export default function ModelPanel({
         const newModels = modelsData[provider] ?? [];
         setValue('model', newModels[0] ?? '');
       }
+      localStorage.setItem(LocalStorageKeys.LAST_AGENT_MODEL, _model);
+      localStorage.setItem(LocalStorageKeys.LAST_AGENT_PROVIDER, provider);
     }
 
     if (provider && !_model) {