fix(app): agent fallback colors

packages/app/src/pages/layout.tsx

@@ -57,6 +57,7 @@ import { Binary } from "@opencode-ai/util/binary"
 import { retry } from "@opencode-ai/util/retry"
 import { playSound, soundSrc } from "@/utils/sound"
 import { Worktree as WorktreeState } from "@/utils/worktree"
+import { agentColor } from "@/utils/agent"
 
 import { useDialog } from "@opencode-ai/ui/context/dialog"
 import { useTheme, type ColorScheme } from "@opencode-ai/ui/theme"
@@ -1639,7 +1640,7 @@ export default function Layout(props: ParentProps) {
       if (!user?.agent) return undefined
 
       const agent = sessionStore.agent.find((a) => a.name === user.agent)
-      return agent?.color
+      return agentColor(user.agent, agent?.color)
     })
 
     const hoverMessages = createMemo(() =>