refactor(emcn): share Code.Viewer appearances

apps/sim/app/workspace/[workspaceId]/logs/components/log-details/components/trace-view/trace-view.tsx

@@ -495,7 +495,8 @@ function DetailCodeSection({
             <Code.Viewer
               code={jsonString}
               language='json'
-              className='max-w-full rounded-md border-0 bg-[var(--surface-4)]! [word-break:break-all] dark:bg-[var(--surface-3)]!'
+              appearance='inspection'
+              className='max-w-full [word-break:break-all]'
               wrapText
               searchQuery={isSearchActive ? searchQuery : undefined}
               currentMatchIndex={currentMatchIndex}

apps/sim/app/workspace/[workspaceId]/logs/components/log-details/log-details.tsx

@@ -159,7 +159,8 @@ export const WorkflowOutputSection = memo(
           <Code.Viewer
             code={jsonString}
             language='json'
-            className='max-h-[300px] min-h-0 max-w-full rounded-md border-0 bg-[var(--surface-4)]! [word-break:break-all] dark:bg-[var(--surface-3)]!'
+            appearance='inspection'
+            className='max-h-[300px] min-h-0 max-w-full [word-break:break-all]'
             wrapText
             searchQuery={isSearchActive ? searchQuery : undefined}
             currentMatchIndex={currentMatchIndex}

apps/sim/app/workspace/[workspaceId]/settings/components/workflow-mcp-servers/workflow-mcp-servers.tsx

@@ -607,7 +607,7 @@ function ServerDetailView({
                               : 'json'
                         }
                         wrapText
-                        className='min-h-0! rounded-sm border border-[var(--border-1)]'
+                        className='min-h-0!'
                       />
                       {activeConfigTab === 'cursor' && (
                         <a

apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/deploy/components/deploy-modal/components/api/api.tsx

@@ -493,7 +493,7 @@ console.log(limits);`
           code={getSyncCommand()}
           language={LANGUAGE_SYNTAX[language]}
           wrapText
-          className='min-h-0! rounded-sm border border-[var(--border-1)]'
+          className='min-h-0!'
         />
       </div>
 
@@ -533,7 +533,7 @@ console.log(limits);`
           code={getStreamCommand()}
           language={LANGUAGE_SYNTAX[language]}
           wrapText
-          className='min-h-0! rounded-sm border border-[var(--border-1)]'
+          className='min-h-0!'
         />
       </div>
 
@@ -579,7 +579,7 @@ console.log(limits);`
             code={getAsyncCommand()}
             language={LANGUAGE_SYNTAX[language]}
             wrapText
-            className='min-h-0! rounded-sm border border-[var(--border-1)]'
+            className='min-h-0!'
           />
         </div>
       )}

apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/terminal/components/output-panel/output-panel.tsx

@@ -66,7 +66,8 @@ const OutputCodeContent = React.memo(function OutputCodeContent({
       code={code}
       showGutter
       language={language}
-      className='m-0 min-h-full rounded-none border-0 bg-[var(--bg)] dark:bg-[var(--bg)]'
+      appearance='flat'
+      className='m-0 min-h-full'
       paddingLeft={8}
       gutterStyle={{ backgroundColor: 'transparent' }}
       wrapText={wrapText}

apps/sim/app/workspace/[workspaceId]/w/components/preview/components/preview-editor/preview-editor.tsx

@@ -1226,7 +1226,8 @@ function PreviewEditorContent({
                   <Code.Viewer
                     code={formatValueAsJson(executionData.input)}
                     language='json'
-                    className='max-h-[300px] min-h-0 max-w-full rounded-md border-0 bg-[var(--surface-4)]! [word-break:break-all] dark:bg-[var(--surface-3)]!'
+                    appearance='inspection'
+                    className='max-h-[300px] min-h-0 max-w-full [word-break:break-all]'
                     wrapText={wrapText}
                     searchQuery={isSearchActive ? searchQuery : undefined}
                     currentMatchIndex={currentMatchIndex}
@@ -1293,8 +1294,9 @@ function PreviewEditorContent({
                   <Code.Viewer
                     code={formatValueAsJson(executionData.output)}
                     language='json'
+                    appearance='inspection'
                     className={cn(
-                      'max-h-[300px] min-h-0 max-w-full rounded-md border-0 bg-[var(--surface-4)]! [word-break:break-all] dark:bg-[var(--surface-3)]!',
+                      'max-h-[300px] min-h-0 max-w-full [word-break:break-all]',
                       executionData.status === 'error' && 'text-[var(--text-error)]'
                     )}
                     wrapText={wrapText}

packages/emcn/src/components/code/code.test.tsx

@@ -1,17 +1,25 @@
 /**
  * @vitest-environment jsdom
  */
-import { act } from 'react'
+import { act, createRef } from 'react'
 import { sleep } from '@sim/utils/helpers'
 import { createRoot, type Root } from 'react-dom/client'
-import { afterEach, beforeEach, describe, expect, it } from 'vitest'
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
 import { Code } from './code'
 
 let root: Root | null = null
 let host: HTMLDivElement | null = null
 
 beforeEach(() => {
   ;(globalThis as { IS_REACT_ACT_ENVIRONMENT?: boolean }).IS_REACT_ACT_ENVIRONMENT = true
+  vi.stubGlobal(
+    'ResizeObserver',
+    class {
+      observe() {}
+      unobserve() {}
+      disconnect() {}
+    }
+  )
   host = document.createElement('div')
   document.body.appendChild(host)
   root = createRoot(host)
@@ -20,6 +28,7 @@ beforeEach(() => {
 afterEach(() => {
   if (root) act(() => root?.unmount())
   host?.remove()
+  vi.unstubAllGlobals()
   root = null
   host = null
 })
@@ -60,3 +69,79 @@ describe('Code.Viewer workflow references', () => {
     expect(host?.querySelector('[data-search-match]')?.textContent).toBe('result')
   })
 })
+
+describe('Code.Viewer appearances', () => {
+  for (const virtualized of [false, true]) {
+    it(`applies the inspection surface to ${virtualized ? 'virtualized' : 'standard'} output`, async () => {
+      await act(async () => {
+        root?.render(
+          <Code.Viewer
+            code='{"result": true}'
+            language='json'
+            showGutter
+            virtualized={virtualized}
+            appearance='inspection'
+            className='max-h-[300px]'
+          />
+        )
+        await sleep(1)
+      })
+
+      const viewer = host?.firstElementChild
+      expect(viewer?.classList.contains('rounded-md')).toBe(true)
+      expect(viewer?.classList.contains('border-0')).toBe(true)
+      expect(viewer?.classList.contains('bg-[var(--surface-4)]!')).toBe(true)
+      expect(viewer?.classList.contains('dark:bg-[var(--surface-3)]!')).toBe(true)
+      expect(viewer?.classList.contains('max-h-[300px]')).toBe(true)
+    })
+  }
+
+  it('keeps the flat viewer separate from the default code container', async () => {
+    await act(async () => {
+      root?.render(
+        <>
+          <Code.Viewer code='default' />
+          <Code.Viewer code='flat' appearance='flat' />
+        </>
+      )
+      await sleep(1)
+    })
+
+    const [defaultViewer, flatViewer] = Array.from(host?.children ?? [])
+    expect(defaultViewer.classList.contains('rounded-sm')).toBe(true)
+    expect(flatViewer.classList.contains('rounded-none')).toBe(true)
+    expect(flatViewer.classList.contains('bg-[var(--bg)]')).toBe(true)
+    expect(flatViewer.classList.contains('dark:bg-[var(--bg)]')).toBe(true)
+    expect(flatViewer.textContent).toContain('flat')
+  })
+
+  it('applies flat chrome on the virtualized gutter path used by the terminal', async () => {
+    const contentRef = createRef<HTMLDivElement>()
+    await act(async () => {
+      root?.render(
+        <Code.Viewer
+          code={'first line\nsecond line'}
+          language='json'
+          appearance='flat'
+          className='m-0 min-h-full'
+          showGutter
+          virtualized
+          wrapText
+          paddingLeft={8}
+          contentRef={contentRef}
+        />
+      )
+      await sleep(1)
+    })
+
+    const viewer = host?.firstElementChild
+    expect(contentRef.current).toBe(viewer)
+    expect(viewer?.classList.contains('rounded-none')).toBe(true)
+    expect(viewer?.classList.contains('border-0')).toBe(true)
+    expect(viewer?.classList.contains('bg-[var(--bg)]')).toBe(true)
+    expect(viewer?.classList.contains('dark:bg-[var(--bg)]')).toBe(true)
+    expect(viewer?.classList.contains('overflow-x-hidden')).toBe(true)
+    expect(viewer?.classList.contains('min-h-full')).toBe(true)
+    expect(viewer?.classList.contains('rounded-sm')).toBe(false)
+  })
+})

packages/emcn/src/components/code/code.tsx

@@ -13,6 +13,7 @@ import {
 import { escapeRegExp } from '@sim/utils/string'
 import { findWorkflowReferenceTokens } from '@sim/utils/workflow-references'
 import { useVirtualizer } from '@tanstack/react-virtual'
+import { cva, type VariantProps } from 'class-variance-authority'
 import { ChevronRight } from '../../icons'
 import { cn } from '../../lib/cn'
 import './code.css'
@@ -856,6 +857,18 @@ function applySearchHighlightingToLine(
  */
 type CodeViewerDensity = 'default' | 'compact'
 
+/** Container appearances shared by the standard and virtualized viewers. */
+export const codeViewerAppearanceVariants = cva('', {
+  variants: {
+    appearance: {
+      default: '',
+      inspection: 'rounded-md border-0 bg-[var(--surface-4)]! dark:bg-[var(--surface-3)]!',
+      flat: 'rounded-none border-0 bg-[var(--bg)] dark:bg-[var(--bg)]',
+    },
+  },
+  defaultVariants: { appearance: 'default' },
+})
+
 interface CodeViewerProps {
   /** Code content to display */
   code: string
@@ -865,6 +878,8 @@ interface CodeViewerProps {
   language?: 'javascript' | 'json' | 'python' | 'bash' | 'toml'
   /** Additional CSS classes for the container */
   className?: string
+  /** Container appearance for code inspected in logs/previews or on flat surfaces. */
+  appearance?: NonNullable<VariantProps<typeof codeViewerAppearanceVariants>['appearance']>
   /** Visual density for read-only code. */
   density?: CodeViewerDensity
   /** Highlight Sim `{{ENV}}` and `<block.output>` references with the platform accent. */
@@ -948,6 +963,7 @@ type ViewerInnerProps = {
   language: 'javascript' | 'json' | 'python' | 'bash' | 'toml'
   /** Additional CSS classes for the container */
   className?: string
+  appearance: NonNullable<CodeViewerProps['appearance']>
   /** Visual density for read-only code. */
   density: CodeViewerDensity
   highlightWorkflowReferences: boolean
@@ -978,6 +994,7 @@ const VirtualizedViewerInner = memo(function VirtualizedViewerInner({
   showGutter,
   language,
   className,
+  appearance,
   density,
   highlightWorkflowReferences,
   paddingLeft,
@@ -1147,6 +1164,7 @@ const VirtualizedViewerInner = memo(function VirtualizedViewerInner({
         wrapText ? 'overflow-x-hidden' : 'overflow-x-auto',
         'overflow-y-auto',
         'dark:bg-[var(--code-bg)]',
+        codeViewerAppearanceVariants({ appearance }),
         className
       )}
       style={{ height: containerHeight }}
@@ -1196,6 +1214,7 @@ const ViewerInner = memo(function ViewerInner({
   showGutter,
   language,
   className,
+  appearance,
   density,
   highlightWorkflowReferences,
   paddingLeft,
@@ -1309,7 +1328,7 @@ const ViewerInner = memo(function ViewerInner({
   // Grid-based rendering for gutter alignment (works with wrap)
   if (showGutter) {
     return (
-      <Container className={className}>
+      <Container className={cn(codeViewerAppearanceVariants({ appearance }), className)}>
         <Content className='code-editor-theme' editorRef={contentRef}>
           <div
             style={{
@@ -1370,7 +1389,7 @@ const ViewerInner = memo(function ViewerInner({
 
   // Simple display without gutter
   return (
-    <Container className={className}>
+    <Container className={cn(codeViewerAppearanceVariants({ appearance }), className)}>
       <Content className='code-editor-theme' editorRef={contentRef}>
         <pre
           className={cn(
@@ -1417,6 +1436,7 @@ function Viewer({
   showGutter = false,
   language = 'json',
   className,
+  appearance = 'default',
   density = 'default',
   highlightWorkflowReferences = false,
   paddingLeft = 0,
@@ -1434,6 +1454,7 @@ function Viewer({
     showGutter,
     language,
     className,
+    appearance,
     density,
     highlightWorkflowReferences,
     paddingLeft,

packages/emcn/src/index.ts

@@ -15,6 +15,7 @@ export {
   CODE_LINE_HEIGHT_PX,
   Code,
   calculateGutterWidth,
+  codeViewerAppearanceVariants,
   getCodeEditorProps,
 } from './components/code/code'
 export {

packages/workflow-renderer/src/lib/code-hover-card.tsx

@@ -181,7 +181,8 @@ export function CodeHoverCard({ preview, className, children }: CodeHoverCardPro
           density='compact'
           paddingLeft={8}
           highlightWorkflowReferences
-          className='max-h-[min(16rem,calc(100vh-2rem))] min-h-0 overflow-x-hidden rounded-none border-0 bg-[var(--bg)] shadow-none dark:bg-[var(--bg)]'
+          appearance='flat'
+          className='max-h-[min(16rem,calc(100vh-2rem))] min-h-0 overflow-x-hidden shadow-none'
         />
       </PopoverContent>
     </Popover>