refactor: extract agent flavor utility functions into shared module

web/src/components/AssistantChat/HappyComposer.tsx

@@ -20,6 +20,7 @@ import { useActiveSuggestions } from '@/hooks/useActiveSuggestions'
 import { applySuggestion } from '@/utils/applySuggestion'
 import { usePlatform } from '@/hooks/usePlatform'
 import { usePWAInstall } from '@/hooks/usePWAInstall'
+import { isCodexFamilyFlavor } from '@/lib/agentFlavorUtils'
 import { markSkillUsed } from '@/lib/recent-skills'
 import { FloatingOverlay } from '@/components/ChatInput/FloatingOverlay'
 import { Autocomplete } from '@/components/ChatInput/Autocomplete'
@@ -312,7 +313,7 @@ export function HappyComposer(props: {
 
     useEffect(() => {
         const handleGlobalKeyDown = (e: globalThis.KeyboardEvent) => {
-            if (e.key === 'm' && (e.metaKey || e.ctrlKey) && onModelModeChange && agentFlavor !== 'codex' && agentFlavor !== 'gemini' && agentFlavor !== 'opencode') {
+            if (e.key === 'm' && (e.metaKey || e.ctrlKey) && onModelModeChange && !isCodexFamilyFlavor(agentFlavor)) {
                 e.preventDefault()
                 const currentIndex = MODEL_MODES.indexOf(modelMode as typeof MODEL_MODES[number])
                 const nextIndex = (currentIndex + 1) % MODEL_MODES.length
@@ -386,7 +387,7 @@ export function HappyComposer(props: {
     }, [onModelModeChange, controlsDisabled, haptic])
 
     const showPermissionSettings = Boolean(onPermissionModeChange && permissionModeOptions.length > 0)
-    const showModelSettings = Boolean(onModelModeChange && agentFlavor !== 'codex' && agentFlavor !== 'gemini' && agentFlavor !== 'opencode')
+    const showModelSettings = Boolean(onModelModeChange && !isCodexFamilyFlavor(agentFlavor))
     const showSettingsButton = Boolean(showPermissionSettings || showModelSettings)
     const showAbortButton = true
     const voiceEnabled = Boolean(onVoiceToggle)

web/src/components/ToolCard/PermissionFooter.tsx

@@ -4,6 +4,7 @@ import type { SessionMetadataSummary } from '@/types/api'
 import type { ChatToolCall, ToolPermission } from '@/chat/types'
 import { usePlatform } from '@/hooks/usePlatform'
 import { Spinner } from '@/components/Spinner'
+import { isCodexFamilyFlavor } from '@/lib/agentFlavorUtils'
 import { getInputStringAny } from '@/lib/toolInputUtils'
 import { useTranslation } from '@/lib/use-translation'
 
@@ -22,9 +23,7 @@ function isToolAllowedForSession(toolName: string, toolInput: unknown, allowedTo
 }
 
 function isCodexSession(metadata: SessionMetadataSummary | null, toolName: string): boolean {
-    return metadata?.flavor === 'codex'
-        || metadata?.flavor === 'gemini'
-        || metadata?.flavor === 'opencode'
+    return isCodexFamilyFlavor(metadata?.flavor)
         || toolName.startsWith('Codex')
         || toolName.startsWith('Gemini')
         || toolName.startsWith('OpenCode')

web/src/hooks/mutations/useSessionActions.ts

@@ -4,6 +4,7 @@ import type { ApiClient } from '@/api/client'
 import type { ModelMode, PermissionMode } from '@/types/api'
 import { queryKeys } from '@/lib/query-keys'
 import { clearMessageWindow } from '@/lib/message-window-store'
+import { isKnownFlavor } from '@/lib/agentFlavorUtils'
 
 export function useSessionActions(
     api: ApiClient | null,
@@ -62,8 +63,7 @@ export function useSessionActions(
             if (!api || !sessionId) {
                 throw new Error('Session unavailable')
             }
-            const isKnownFlavor = agentFlavor === 'claude' || agentFlavor === 'codex' || agentFlavor === 'gemini' || agentFlavor === 'opencode'
-            if (isKnownFlavor && !isPermissionModeAllowedForFlavor(mode, agentFlavor)) {
+            if (isKnownFlavor(agentFlavor) && !isPermissionModeAllowedForFlavor(mode, agentFlavor)) {
                 throw new Error('Invalid permission mode for session flavor')
             }
             await api.setPermissionMode(sessionId, mode)

web/src/lib/agentFlavorUtils.ts

@@ -0,0 +1,11 @@
+export function isCodexFamilyFlavor(flavor?: string | null): boolean {
+    return flavor === 'codex' || flavor === 'gemini' || flavor === 'opencode'
+}
+
+export function isClaudeFlavor(flavor?: string | null): boolean {
+    return flavor === 'claude'
+}
+
+export function isKnownFlavor(flavor?: string | null): boolean {
+    return isClaudeFlavor(flavor) || isCodexFamilyFlavor(flavor)
+}