refactor: Fix React Compiler violations in Menu

[frankieyan]

Part of #1066.

• File: src/menu/menu.tsx
• Violations: Hooks must be the same function on every render ×2 (Error, lines 134 and 165): both are menuStore.useState('open') (AriaKit store hook reached through a mutable object).

Steps

1. Reproduce and confirm both violations.
2. Fix: migrate menuStore.useState('open') to useStoreState(menuStore, 'open') from @ariakit/react, per #conditional-hook-calls. The same migration covers refactor: Fix React Compiler violation in Tooltip #1069 (tooltip) and refactor: Fix React Compiler violations in Tabs #1070 (tabs); not a dependency (the compiler runs per-module), but the three can land in one PR.
3. Confirm the count dropped; let the hook update the record file.
4. Verify memoization in the compiled output.