discount for business and personall in discount page

src/models/_entities/products.rs

@@ -17,6 +17,7 @@ pub struct Model {
     pub description: Option<String>,
     pub price_cents: i64,
     pub sale_price_cents: Option<i64>,
+    pub business_sale_price_cents: Option<i64>,
     pub currency: String,
     pub sku: Option<String>,
     pub stock: i32,

src/models/products.rs

@@ -37,6 +37,13 @@ impl Model {
             self.price_cents
         }
     }
+
+    /// Whether a baseline business discount (for all company accounts) is set and
+    /// actually below the regular price.
+    #[must_use]
+    pub fn business_on_sale(&self) -> bool {
+        matches!(self.business_sale_price_cents, Some(sale) if sale < self.price_cents)
+    }
 }
 
 // implement your write-oriented logic here