Wait for admin role check to complete before setting loading to false.
This prevents race condition where:
1. authLoading becomes false after session loads
2. isAdmin is still false (async check in progress)
3. Page redirects to /dashboard before isAdmin is set to true
Now loading stays true until BOTH session and admin role are loaded,
ensuring admin pages don't redirect on reload.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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