Fix client sid error

Author: Sg312

apps/sim/app/workspace/[workspaceId]/home/components/message-content/message-content.tsx

@@ -2,7 +2,6 @@
 
 import { memo, useMemo } from 'react'
 import { Read as ReadTool, WorkspaceFile } from '@/lib/copilot/generated/tool-catalog-v1'
-import { isToolHiddenInUi } from '@/lib/copilot/tools/client/hidden-tools'
 import { resolveToolDisplay } from '@/lib/copilot/tools/client/store-utils'
 import { ClientToolCallState } from '@/lib/copilot/tools/client/tool-call-state'
 import type { ContentBlock, MothershipResource, OptionItem, ToolCallData } from '../../types'
@@ -18,6 +17,7 @@ import {
 } from './components'
 
 const FILE_SUBAGENT_ID = 'file'
+const HIDDEN_TOOL_NAMES = new Set(['tool_search_tool_regex', 'load_agent_skill', 'load_custom_tool'])
 
 interface TextSegment {
   type: 'text'
@@ -75,6 +75,10 @@ function isToolResultRead(params?: Record<string, unknown>): boolean {
   return typeof path === 'string' && path.startsWith('internal/tool-results/')
 }
 
+function isHiddenToolCall(toolName: string | undefined): boolean {
+  return !!toolName && HIDDEN_TOOL_NAMES.has(toolName)
+}
+
 function formatToolName(name: string): string {
   return name
     .replace(/_v\d+$/, '')
@@ -301,7 +305,7 @@ function parseBlocks(blocks: ContentBlock[]): MessageSegment[] {
     if (block.type === 'tool_call') {
       if (!block.toolCall) continue
       const tc = block.toolCall
-      if (isToolHiddenInUi(tc.name)) continue
+      if (isHiddenToolCall(tc.name)) continue
       if (tc.name === ReadTool.id && isToolResultRead(tc.params)) continue
       const isDispatch = SUBAGENT_KEYS.has(tc.name) && !tc.calledBy