feat: Intelligent cart grouping and relative arrival times

dashboard/app.js

@@ -62,14 +62,25 @@ async function updateState() {
         document.getElementById('chips-count').textContent = data.inventory.chips;
         document.getElementById('sensors-count').textContent = data.inventory.sensors;
 
-        // Update Cart
+        // Update Cart with Grouping & Relative Time
         const cartContainer = document.getElementById('cart-container');
         if (data.active_shipments && data.active_shipments.length > 0) {
-            cartContainer.innerHTML = data.active_shipments.map(ship => `
+            // Group by part and eta
+            const grouped = data.active_shipments.reduce((acc, ship) => {
+                const key = `${ship.part}-${ship.eta}`;
+                if (!acc[key]) {
+                    acc[key] = { ...ship };
+                } else {
+                    acc[key].quantity += ship.quantity;
+                }
+                return acc;
+            }, {});
+
+            cartContainer.innerHTML = Object.values(grouped).map(ship => `
                 <div class="cart-item">
                     <div class="cart-type">${ship.part} (x${ship.quantity})</div>
                     <div class="cart-meta">Mode: ${ship.mode.toUpperCase()}</div>
-                    <div class="arrival-day">Arrives Day: ${currentDay + ship.eta}</div>
+                    <div class="arrival-day">Arrives in: ${ship.eta} days</div>
                 </div>
             `).join('');
         } else {
@@ -110,7 +121,7 @@ const modeSelect = document.getElementById('mode-select');
 function updatePreview() {
     const mode = modeSelect.value;
     const s = SPECS[mode];
-    const cost = 10 * 1 * s.cost; // Qty 1 now
+    const cost = 10 * 1 * s.cost;
     const carbon = 1 * s.carbon;
 
     document.getElementById('preview-cost').textContent = `$${cost.toFixed(0)}`;
@@ -147,7 +158,7 @@ window.execute = async function(type, event) {
         spawnFeedback(`+1 ${part} added to order`, event.clientX, event.clientY);
         actionObj.part_type = part;
         actionObj.mode = document.getElementById('mode-select').value;
-        actionObj.quantity = 1; // Change to 1 as requested
+        actionObj.quantity = 1; 
     } else if (type === 'produce') {
         actionObj.product = document.getElementById('product-select').value;
     } else if (type === 'offset') {