Fix product performance grouped JSON build

ui/src/pages/ProductionProductCostingHasCost.vue

@@ -40,6 +40,14 @@
             :loading="loading"
             @click="fetchRows"
           />
+          <q-btn
+            label="Excel'e Aktar"
+            icon="download"
+            color="primary"
+            outline
+            :disable="loading || rows.length === 0"
+            @click="exportVisibleRows"
+          />
         </div>
       </div>
     </div>
@@ -374,6 +382,38 @@ function clearFilters () {
   fetchRows()
 }
 
+function escapeExcelCsvCell (value) {
+  let text = String(value ?? '')
+  // Prevent spreadsheet applications from evaluating data as a formula.
+  if (/^[=+\-@]/.test(text)) text = `'${text}`
+  return `"${text.replace(/"/g, '""')}"`
+}
+
+function exportVisibleRows () {
+  const visibleRows = Array.isArray(rows.value) ? rows.value : []
+  if (visibleRows.length === 0) return
+
+  const exportColumns = columns.filter(col => col.name !== 'open')
+  const csvLines = [
+    exportColumns.map(col => escapeExcelCsvCell(col.label)).join(';'),
+    ...visibleRows.map(row => exportColumns.map(col => {
+      const rawValue = typeof col.field === 'function' ? col.field(row) : row?.[col.field]
+      const displayValue = typeof col.format === 'function' ? col.format(rawValue, row) : rawValue
+      return escapeExcelCsvCell(displayValue)
+    }).join(';'))
+  ]
+
+  const blob = new Blob([`\uFEFF${csvLines.join('\r\n')}`], { type: 'text/csv;charset=utf-8;' })
+  const url = URL.createObjectURL(blob)
+  const link = document.createElement('a')
+  link.href = url
+  link.download = `mevcut_maliyetli_urunler_${new Date().toISOString().slice(0, 10)}.csv`
+  document.body.appendChild(link)
+  link.click()
+  link.remove()
+  URL.revokeObjectURL(url)
+}
+
 function openRow (row) {
   const urunKodu = String(row?.UrunKodu || '').trim()
   if (!urunKodu) return