fix(settings): ensure newly added variables are always preserved and saved

src/views/settings/SettingsView.vue

@@ -320,6 +320,9 @@ const getSlotDefaultName = (templateKey, slotKey) => {
   return found?.defaultName || '';
 };
 
+let varIdCounter = 0;
+const nextVarId = () => `var_${++varIdCounter}_${Date.now()}`;
+
 const lockedAtLabel = computed(() => {
   if (!lockedAt.value) return '';
   const date = new Date(lockedAt.value);
@@ -332,9 +335,7 @@ const onSlotChange = (templateKey, vIdx) => {
   if (!form || !form.variables[vIdx]) return;
   const currentVar = form.variables[vIdx];
   const defaultName = getSlotDefaultName(templateKey, currentVar.slot);
-  if (!currentVar.name || currentVar.name === 'param') {
-    currentVar.name = defaultName;
-  }
+  currentVar.name = defaultName;
 };
 
 const addVariable = (templateKey) => {
@@ -347,7 +348,7 @@ const addVariable = (templateKey) => {
   const selectedSlot = unusedSlot || availableSlots[0] || { slot: 'amount', defaultName: 'PAYMENT_PRICE' };
 
   form.variables.push({
-    id: `var_${Date.now()}_${Math.random().toString(36).substring(2, 7)}`,
+    id: nextVarId(),
     slot: selectedSlot.slot,
     name: selectedSlot.defaultName || ''
   });
@@ -449,13 +450,13 @@ const emptyFormEntry = (template) => {
   let vars = [];
   if (Array.isArray(template?.variables) && template.variables.length > 0) {
     vars = template.variables.map((variable) => ({
-      id: `var_${Date.now()}_${Math.random().toString(36).substring(2, 7)}`,
+      id: nextVarId(),
       slot: variable.slot || slots[0]?.slot || 'amount',
       name: variable.name || getSlotDefaultName(template?.key, variable.slot) || ''
     }));
   } else if (!template?.variables) {
     vars = slots.map((s) => ({
-      id: `var_${Date.now()}_${Math.random().toString(36).substring(2, 7)}`,
+      id: nextVarId(),
       slot: s.slot,
       name: s.defaultName
     }));
@@ -499,11 +500,15 @@ const saveSmsTemplates = async () => {
       smsTemplatesPayload[template.key] = {
         templateId: String(entry.templateId || '').trim(),
         variables: (entry.variables || [])
-          .filter((v) => v.slot && String(v.name || '').trim())
-          .map((v) => ({
-            slot: v.slot,
-            name: String(v.name).trim().replace(/^#+|#+$/g, '')
-          }))
+          .filter((v) => v && v.slot)
+          .map((v) => {
+            const raw = String(v.name || '').trim().replace(/^#+|#+$/g, '');
+            const fallback = getSlotDefaultName(template.key, v.slot) || v.slot;
+            return {
+              slot: v.slot,
+              name: raw || fallback
+            };
+          })
       };
     });
     const response = await settingsApi.save({ smsTemplates: smsTemplatesPayload });