feat: automatically remove items from stock when empty (quantity <= 0)

db.js

@@ -49,7 +49,7 @@ db.exec(`
 
 // Item functions
 function getAllItems({ search = '', category = '', location = '', status = 'all' } = {}) {
-  let query = `SELECT * FROM items WHERE 1=1`;
+  let query = `SELECT * FROM items WHERE quantity > 0`;
   const params = [];
 
   if (search) {
@@ -73,7 +73,7 @@ function getAllItems({ search = '', category = '', location = '', status = 'all'
   } else if (status === 'full') {
     query += ` AND (is_opened = 0 AND quantity >= initial_quantity)`;
   } else if (status === 'low') {
-    query += ` AND (quantity <= (initial_quantity * 0.25) OR quantity = 0)`;
+    query += ` AND quantity <= (initial_quantity * 0.25)`;
   }
 
   query += ` ORDER BY updated_at DESC, name ASC`;
@@ -148,6 +148,21 @@ function updateItem(id, item) {
 
   const qty = item.quantity !== undefined ? Number(item.quantity) : existing.quantity;
   const init_qty = item.initial_quantity !== undefined ? Number(item.initial_quantity) : existing.initial_quantity;
+
+  // If item updated to 0 or less, remove it from stock automatically
+  if (qty <= 0) {
+    deleteItem(id);
+    return {
+      id,
+      name: item.name || existing.name,
+      quantity: 0,
+      initial_quantity: init_qty,
+      unit: item.unit || existing.unit,
+      deleted: true,
+      is_empty: true
+    };
+  }
+
   const is_opened = item.is_opened !== undefined ? (item.is_opened ? 1 : 0) : existing.is_opened;
   let opened_at = existing.opened_at;
   if (is_opened && !existing.is_opened) {
@@ -218,8 +233,30 @@ function adjustQuantity(id, { newQuantity, delta, markOpened }) {
     targetQty = item.quantity + Number(delta);
   }
 
-  // Prevent negative quantity
-  if (targetQty < 0) targetQty = 0;
+  // If item is finished/empty (0 or less), automatically remove it from stock
+  if (targetQty <= 0) {
+    logActivity({
+      item_id: id,
+      item_name: item.name,
+      action: 'consume_all',
+      amount_change: -item.quantity,
+      unit: item.unit,
+      note: `Consumed all (${item.quantity} ${item.unit}) - automatically removed from stock`
+    });
+
+    const delStmt = db.prepare(`DELETE FROM items WHERE id = ?`);
+    delStmt.run(id);
+
+    return {
+      id,
+      name: item.name,
+      quantity: 0,
+      initial_quantity: item.initial_quantity,
+      unit: item.unit,
+      deleted: true,
+      is_empty: true
+    };
+  }
 
   const is_opened = markOpened !== undefined ? (markOpened ? 1 : 0) : (item.is_opened || (targetQty < item.initial_quantity ? 1 : 0));
   const opened_at = is_opened && !item.opened_at ? new Date().toISOString().slice(0, 10) : item.opened_at;
@@ -240,12 +277,10 @@ function adjustQuantity(id, { newQuantity, delta, markOpened }) {
   logActivity({
     item_id: id,
     item_name: item.name,
-    action: targetQty === 0 ? 'consume_all' : (diff < 0 ? 'consume_part' : 'restock'),
+    action: diff < 0 ? 'consume_part' : 'restock',
     amount_change: diff,
     unit: item.unit,
-    note: targetQty === 0 
-      ? `Consumed all (${item.quantity} ${item.unit})` 
-      : `${diff < 0 ? 'Consumed' : 'Added'} ${Math.abs(diff)} ${item.unit} (remaining: ${targetQty} ${item.unit})`
+    note: `${diff < 0 ? 'Consumed' : 'Added'} ${Math.abs(diff)} ${item.unit} (remaining: ${targetQty} ${item.unit})`
   });
 
   return getItemById(id);
@@ -287,8 +322,29 @@ function removePacket(id, count = 1) {
   const removeAmount = packSize * count;
   let newQty = item.quantity - removeAmount;
 
+  // If item is completely removed/empty, remove from stock automatically
   if (newQty <= 0) {
-    newQty = 0;
+    logActivity({
+      item_id: id,
+      item_name: item.name,
+      action: 'remove_packet',
+      amount_change: -item.quantity,
+      unit: item.unit,
+      note: `Removed all remaining stock (${count} packet(s)) - automatically removed from stock`
+    });
+
+    const delStmt = db.prepare(`DELETE FROM items WHERE id = ?`);
+    delStmt.run(id);
+
+    return {
+      id,
+      name: item.name,
+      quantity: 0,
+      initial_quantity: item.initial_quantity,
+      unit: item.unit,
+      deleted: true,
+      is_empty: true
+    };
   }
 
   const stmt = db.prepare(`