fix(cli): disable Freebuff chat logo sheen

cli/src/components/chat-header.tsx

@@ -8,6 +8,7 @@ import { IS_FREEBUFF } from '../utils/constants'
 import { openFileAtPath } from '../utils/open-file'
 import { formatCwd } from '../utils/path-helpers'
 import { getLogoAccentColor, getLogoBlockColor } from '../utils/theme-system'
+import { shouldAnimateChatHeader } from '../utils/chat-header-animation'
 import { TerminalLink } from './terminal-link'
 
 export const ChatHeader = memo(function ChatHeader({
@@ -23,7 +24,7 @@ export const ChatHeader = memo(function ChatHeader({
   const blockColor = getLogoBlockColor(theme.name)
   const accentColor = getLogoAccentColor(theme.name)
   const { applySheenToChar } = useSheenAnimation({
-    enabled: animationEnabled,
+    enabled: shouldAnimateChatHeader(animationEnabled, IS_FREEBUFF),
     logoColor: theme.foreground,
     accentColor,
     blockColor,

cli/src/utils/__tests__/chat-header-animation.test.ts

@@ -0,0 +1,18 @@
+import { describe, expect, it } from 'bun:test'
+
+import { shouldAnimateChatHeader } from '../chat-header-animation'
+
+describe('shouldAnimateChatHeader', () => {
+  it('disables the sheen for the Freebuff chat header', () => {
+    expect(shouldAnimateChatHeader(true, true)).toBe(false)
+  })
+
+  it('keeps the Codebuff sheen when the header is active', () => {
+    expect(shouldAnimateChatHeader(true, false)).toBe(true)
+  })
+
+  it('does not animate an inactive header for either product', () => {
+    expect(shouldAnimateChatHeader(false, true)).toBe(false)
+    expect(shouldAnimateChatHeader(false, false)).toBe(false)
+  })
+})

cli/src/utils/chat-header-animation.ts

@@ -0,0 +1,10 @@
+/**
+ * Freebuff's chat logo sheen can make the focused input appear to flicker.
+ * Keep the animation for Codebuff while leaving the Freebuff chat header static.
+ */
+export function shouldAnimateChatHeader(
+  animationEnabled: boolean,
+  isFreebuff: boolean,
+): boolean {
+  return animationEnabled && !isFreebuff
+}