feat: 优化客户端跨平台配置和运行态管理

Common/PolicyHelper.cpp

@@ -2,6 +2,7 @@
 #include "ConfigHelper.h"
 #include <QApplication>
 #include <QDateTime>
+#include <QDir>
 #include <QFile>
 #include <QJsonArray>
 #include <QJsonDocument>
@@ -11,12 +12,25 @@
 #include <openssl/pem.h>
 #endif
 
-PolicyHelper::PolicyHelper(const QString& baseDir) : m_baseDir(baseDir) {}
-
-bool PolicyHelper::loadPolicy(const QString& relativePath)
-{
-    QFile file(m_baseDir + "/" + relativePath);
-    if (!file.open(QIODevice::ReadOnly)) { m_error = "Cannot open policy file"; return false; }
+PolicyHelper::PolicyHelper(const QString& baseDir) : m_baseDir(baseDir) {}
+
+static QString resolvePolicyPath(const QString& baseDir, const QString& relativePath, bool forWrite)
+{
+    const QString defaultPolicy = QStringLiteral("config/version_policy.dat");
+    if (relativePath == defaultPolicy) {
+        const QString runtimePolicy = ConfigHelper::instance().policyPath();
+        if (forWrite || QFile::exists(runtimePolicy))
+            return runtimePolicy;
+    }
+    if (QDir::isAbsolutePath(relativePath))
+        return relativePath;
+    return baseDir + "/" + relativePath;
+}
+
+bool PolicyHelper::loadPolicy(const QString& relativePath)
+{
+    QFile file(resolvePolicyPath(m_baseDir, relativePath, false));
+    if (!file.open(QIODevice::ReadOnly)) { m_error = "Cannot open policy file"; return false; }
     QJsonParseError error;
     const QJsonDocument doc = QJsonDocument::fromJson(file.readAll(), &error);
     if (error.error != QJsonParseError::NoError || !doc.isObject()) {
@@ -35,7 +49,8 @@ bool PolicyHelper::savePolicy(const QString& relativePath) const
 {
     const QByteArray bytes = QJsonDocument(m_policy).toJson(QJsonDocument::Indented);
     QString writeError;
-    if (!ConfigHelper::writeFileWithElevationIfNeeded(m_baseDir + "/" + relativePath, bytes, &writeError)) {
+    const QString path = resolvePolicyPath(m_baseDir, relativePath, true);
+    if (!ConfigHelper::writeFileWithElevationIfNeeded(path, bytes, &writeError)) {
         m_error = "Cannot save policy file: " + writeError;
         return false;
     }