Unify agent flavor definitions

web/src/hooks/mutations/useSpawnSession.ts

@@ -1,4 +1,5 @@
 import { useMutation, useQueryClient } from '@tanstack/react-query'
+import type { AgentFlavor } from '@hapi/protocol'
 import type { ApiClient } from '@/api/client'
 import type { SpawnResponse } from '@/types/api'
 import { queryKeys } from '@/lib/query-keys'
@@ -6,7 +7,7 @@ import { queryKeys } from '@/lib/query-keys'
 type SpawnInput = {
     machineId: string
     directory: string
-    agent?: 'claude' | 'codex' | 'cursor' | 'gemini' | 'opencode'
+    agent?: AgentFlavor
     model?: string
     effort?: string
     modelReasoningEffort?: string