storing only valid prices

AGENTS.md

@@ -23,7 +23,7 @@ The Excel sheet does not use a simple JSON dump; it implements specific business
 *   **Required Fields:** Rows are skipped if the product code (`cikkszam`) or product name is missing.
 *   **Column Mapping Precedence:**
     *   `BESZCIKKNEV`: Use `cikk_megnevezes_rovid`, falling back to `cikk_megnevezes`.
-    *   `EGYSEGAR`: Prefer `netto_kisker_ar`. If zero, check the product description (`cikk_jellemzok`) for an entry matching `"Alap ár"`.
+    *   **Export Filter:** Rows are skipped if the unit price (`EGYSEGAR`) is zero after applying business logic.
 
 ## 🗂️ Module Ownership
 *   **Schema Changes:** Always update struct definitions in `src/template/antares.rs` before making changes to data handling logic.

src/tools/excel.rs

@@ -88,6 +88,9 @@ pub fn export_to_excel(items: &Antares, path_str: &str) -> Result<(), Box<dyn Er
         }
 
         // Write row data
+        if unit_price == 0.0 {
+            continue;
+        }
         sheet.write_string(row, 0, &cikkszam)?;
         sheet.write_string(row, 1, &cikkszam)?;
         sheet.write_string(row, 2, &megnevezes)?;