feat: assign orders to companies directly and support admin reassignment

shop/app/my-orders/page.tsx

@@ -36,13 +36,7 @@ export default async function MyOrdersPage() {
   let query = supabase.from('orders').select('*')
 
   if (dbUser?.company_id) {
-    const { data: companyUsers } = await supabase
-      .from('users')
-      .select('id')
-      .eq('company_id', dbUser.company_id)
-      
-    const userIds = (companyUsers ?? []).map(u => u.id)
-    query = query.in('user_id', userIds)
+    query = query.eq('company_id', dbUser.company_id)
   } else {
     query = query.eq('user_id', user.id)
   }