feat: import rules from JSON via Rule::fromJson + RuleDao::insert

src/ui/rulesmanagerdialog.cpp

@@ -12,6 +12,7 @@
 #include <QFileDialog>
 #include <QJsonDocument>
 #include <QJsonObject>
+#include <QJsonArray>
 #include <QLabel>
 #include <QMenu>
 #include <QSqlDatabase>
@@ -273,9 +274,32 @@ void RulesManagerDialog::onImportExport(bool import)
     if (import) {
         QString file = QFileDialog::getOpenFileName(this, tr("Importar reglas"), QString(), tr("JSON (*.json)"));
         if (file.isEmpty()) return;
-        
-        // TODO: Parse JSON and create rules
-        QMessageBox::information(this, tr("Importar"), tr("Función de importación en desarrollo."));
+
+        QFile f(file);
+        if (!f.open(QIODevice::ReadOnly)) {
+            QMessageBox::warning(this, tr("Importar"), tr("No se pudo abrir el archivo."));
+            return;
+        }
+        QJsonParseError err;
+        QJsonDocument doc = QJsonDocument::fromJson(f.readAll(), &err);
+        if (err.error != QJsonParseError::NoError || !doc.isArray()) {
+            QMessageBox::warning(this, tr("Importar"), tr("Archivo JSON inválido."));
+            return;
+        }
+        QJsonArray arr = doc.array();
+        int imported = 0;
+        int skipped = 0;
+        for (const QJsonValue &v : arr) {
+            if (!v.isObject()) { ++skipped; continue; }
+            Rule rule = Rule::fromJson(v.toObject());
+            if (rule.name.isEmpty()) { ++skipped; continue; }
+            rule.accountId = m_accountId;  // scope to the dialog's account (-1 = global)
+            if (RuleDao::insert(rule)) ++imported;
+            else ++skipped;
+        }
+        QMessageBox::information(this, tr("Importar"),
+            tr("Se importaron %1 regla(s). %2 omitida(s).").arg(imported).arg(skipped));
+        refresh();
     } else {
         QString file = QFileDialog::getSaveFileName(this, tr("Exportar reglas"), "rules.json", tr("JSON (*.json)"));
         if (file.isEmpty()) return;