fix: filter join requests to only show pending status

Previously approved/rejected requests were still showing in the list.
Now only pending requests are displayed.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

libs/service/src/hooks/teams/index.ts

@@ -372,6 +372,7 @@ export const useTeamJoinRequests = (teamId: string, enabled = true) => {
           user:users(id, email, fullname, avatar)
         `)
         .eq('team_id', teamId)
+        .eq('status', 'pending')
         .order('created_at', { ascending: false });
 
       if (error) {