Scroll wheel fix again

frontend/app.js

@@ -502,6 +502,11 @@ function setupEventListeners() {
 
     const dispenseQuantityInput = document.getElementById('dispenseQuantity');
     if (dispenseQuantityInput) {
+        // Prevent accidental value changes when users scroll while focused.
+        dispenseQuantityInput.addEventListener('wheel', (event) => {
+            event.preventDefault();
+        }, { passive: false });
+
         dispenseQuantityInput.addEventListener('input', () => {
             const mode = getSelectedDispenseMode();
             if (mode !== 'subunit') {
@@ -524,6 +529,14 @@ function setupEventListeners() {
         });
     }
 
+    const dispensePackCountInput = document.getElementById('dispensePackCount');
+    if (dispensePackCountInput) {
+        // Prevent accidental value changes when users scroll while focused.
+        dispensePackCountInput.addEventListener('wheel', (event) => {
+            event.preventDefault();
+        }, { passive: false });
+    }
+
     // Close modal when clicking outside
     window.addEventListener('click', (e) => {
         if (e.target.classList.contains('modal')) {
@@ -1279,7 +1292,7 @@ function renderDispenseBatchAllocationRows(activeBatches) {
             : 0;
         const allocationLabel = mode === 'pack' ? 'Allocate Packs' : 'Allocate';
         const allocationMax = mode === 'pack' ? availableFullPacks : getBatchAvailableDispenseQuantity(batch, mode, selectedPack);
-        const allocationStep = mode === 'pack' ? 1 : 0.1;
+        const allocationStep = mode === 'pack' ? '1' : '1.0';
         const batchAvailabilityNote = mode === 'pack'
             ? (selectedPack && batchMatchesSelectedPack(batch, selectedPack) && availableFullPacks <= 0
                 ? 'No full packs available in this batch'
@@ -1324,6 +1337,11 @@ function renderDispenseBatchAllocationRows(activeBatches) {
     }).join('');
 
     batchInfoContent.querySelectorAll('.dispense-batch-allocation').forEach(input => {
+        // Prevent accidental value changes when users scroll while focused.
+        input.addEventListener('wheel', (event) => {
+            event.preventDefault();
+        }, { passive: false });
+
         input.addEventListener('input', updateDispenseAllocationSummary);
     });
 }