🧹 chore: Remove Deprecated BingAI Code & Address Mobile Focus (#5565)

* chore: remove all bing code

* chore: remove bing code and auto-focus effects

* chore: add back escapeRegExp helper function for regex special character handling

* chore: remove deprecated fields from settings and conversation schema

* fix: ensure default endpoint is set correctly in conversation setup

* feat: add disableFocus option to newConversation for improved search behavior

client/src/hooks/useNewConvo.ts

@@ -8,6 +8,7 @@ import { useNavigate } from 'react-router-dom';
 import {
   Constants,
   FileSources,
+  EModelEndpoint,
   isParamEndpoint,
   LocalStorageKeys,
   isAssistantsEndpoint,
@@ -70,6 +71,7 @@ const useNewConvo = (index = 0) => {
         buildDefault?: boolean,
         keepLatestMessage?: boolean,
         keepAddedConvos?: boolean,
+        disableFocus?: boolean,
       ) => {
         const modelsConfig = modelsData ?? modelsQuery.data;
         const { endpoint = null } = conversation;
@@ -87,11 +89,15 @@ const useNewConvo = (index = 0) => {
             : preset;
 
         if (buildDefaultConversation) {
-          const defaultEndpoint = getDefaultEndpoint({
+          let defaultEndpoint = getDefaultEndpoint({
             convoSetup: activePreset ?? conversation,
             endpointsConfig,
           });
 
+          if (!defaultEndpoint) {
+            defaultEndpoint = Object.keys(endpointsConfig ?? {})[0] as EModelEndpoint;
+          }
+
           const endpointType = getEndpointField(endpointsConfig, defaultEndpoint, 'type');
           if (!conversation.endpointType && endpointType) {
             conversation.endpointType = endpointType;
@@ -161,6 +167,9 @@ const useNewConvo = (index = 0) => {
         }
 
         clearTimeout(timeoutIdRef.current);
+        if (disableFocus === true) {
+          return;
+        }
         timeoutIdRef.current = setTimeout(() => {
           const textarea = document.getElementById(mainTextareaId);
           if (textarea) {
@@ -176,6 +185,7 @@ const useNewConvo = (index = 0) => {
       template: _template = {},
       preset: _preset,
       modelsData,
+      disableFocus,
       buildDefault = true,
       keepLatestMessage = false,
       keepAddedConvos = false,
@@ -184,6 +194,7 @@ const useNewConvo = (index = 0) => {
       preset?: Partial<TPreset>;
       modelsData?: TModelsConfig;
       buildDefault?: boolean;
+      disableFocus?: boolean;
       keepLatestMessage?: boolean;
       keepAddedConvos?: boolean;
     } = {}) {
@@ -254,6 +265,7 @@ const useNewConvo = (index = 0) => {
         buildDefault,
         keepLatestMessage,
         keepAddedConvos,
+        disableFocus,
       );
     },
     [