Add allow_negative_stock toggle for sales, remissions, quotes, layaways and service orders

pos/static/js/config.js

@@ -1021,21 +1021,27 @@ const Config = (() => {
             var res = await fetch(API + '/sales-settings', { headers: headers() });
             if (!res.ok) return;
             var data = await res.json();
-            var cb = document.getElementById('cfg-allow-zero-price');
-            if (cb) cb.checked = data.allow_zero_price_sales !== false;
+            var cbZero = document.getElementById('cfg-allow-zero-price');
+            if (cbZero) cbZero.checked = data.allow_zero_price_sales !== false;
+            var cbNeg = document.getElementById('cfg-allow-negative-stock');
+            if (cbNeg) cbNeg.checked = data.allow_negative_stock === true;
         } catch (e) {
             console.error('Config.loadSalesSettings:', e);
         }
     }
 
     async function saveSalesSettings() {
-        var cb = document.getElementById('cfg-allow-zero-price');
-        if (!cb) return;
+        var cbZero = document.getElementById('cfg-allow-zero-price');
+        var cbNeg = document.getElementById('cfg-allow-negative-stock');
+        if (!cbZero && !cbNeg) return;
         try {
+            var body = {};
+            if (cbZero) body.allow_zero_price_sales = cbZero.checked;
+            if (cbNeg) body.allow_negative_stock = cbNeg.checked;
             var res = await fetch(API + '/sales-settings', {
                 method: 'PUT',
                 headers: headers(),
-                body: JSON.stringify({ allow_zero_price_sales: cb.checked })
+                body: JSON.stringify(body)
             });
             if (!res.ok) {
                 var err = await res.json().catch(function() { return { error: res.statusText }; });

pos/static/js/pos.js

@@ -33,6 +33,7 @@ const POS = (() => {
     let canCreateRemission = false;
     let counterRemissionEnabled = false;
     let allowZeroPriceSales = true;
+    let allowNegativeStock = false;
     let currentPerms = [];
     let receiptConfig = {};
     let couriers = [];
@@ -143,12 +144,14 @@ const POS = (() => {
             } catch (e) {
                 counterRemissionEnabled = false;
             }
-            // Sales settings (zero-price sales toggle)
+            // Sales settings (zero-price and negative-stock toggles)
             try {
                 const ssCfg = await api('/pos/api/config/sales-settings');
                 allowZeroPriceSales = ssCfg.allow_zero_price_sales !== false;
+                allowNegativeStock = ssCfg.allow_negative_stock === true;
             } catch (e) {
                 allowZeroPriceSales = true;
+                allowNegativeStock = false;
             }
             // Counter remission workflow applies only to the counter role.
             canCreateRemission = counterRemissionEnabled && employeeRole === 'counter' && perms.includes('pos.remission');

pos/static/pwa/sw.js

@@ -6,7 +6,7 @@
 // The fetch handler normalizes static asset URLs (strips ?v= query strings)
 // so templates can use cache-busting query params freely.
 
-const VERSION = 44;
+const VERSION = 45;
 const CACHE_NAME = 'nexus-pos-v' + VERSION;
 
 const APP_SHELL = [