fix: parseNum strip 'R$', fmtMR/fmtBR mostram R$ 0,00 para zero

src/index.html

@@ -613,7 +613,7 @@ const fmt = v => 'R$ ' + (parseFloat(v) || 0).toLocaleString('pt-BR', { minimumF
 const parseNum = v => {
   // Already a number? Return directly (don't treat '.' as thousand separator)
   if (typeof v === 'number') return isNaN(v) ? 0 : v;
-  const s = String(v || '0').trim();
+  const s = String(v || '0').trim().replace(/^R\$\s*/, ''); // strip currency prefix first
   if (!s) return 0;
   // Brazilian format: 1.234,56 → 1234.56
   // Strategy: if string has comma, treat as BRL (decimal comma)
@@ -2707,7 +2707,8 @@ function openEditModal(full) {
   // helper para fmt dinheiro
   const fmtMR = v => {
     const n = parseFloat(v||0);
-    if (isNaN(n) || n === 0) return '';
+    if (isNaN(n)) return '';
+    if (n === 0) return 'R$ 0,00';
     return 'R$ ' + n.toLocaleString('pt-BR', { minimumFractionDigits: 2 });
   };
 
@@ -2936,7 +2937,8 @@ function openEditModal(full) {
 // Formata campo de dinheiro brasileiro
 function fmtBR(inp) {
   const v = parseNum(inp.value);
-  if (isNaN(v) || v === 0) return '';
+  if (isNaN(v)) return '';
+  if (v === 0) return 'R$ 0,00';
   return 'R$ ' + v.toLocaleString('pt-BR', { minimumFractionDigits: 2 });
 }