[feat] add daemon support with automatic restart on crash

src/app/main.cpp

@@ -6,12 +6,61 @@
 #endif
 #endif
 
-#include "rd_log.h"
+#include <cstring>
+#include <memory>
+#include <string>
+
+#include "config_center.h"
+#include "daemon.h"
+#include "path_manager.h"
 #include "render.h"
 
-int main([[maybe_unused]] int argc, [[maybe_unused]] char* argv[]) {
+int main(int argc, char* argv[]) {
+  // check if running as child process
+  bool is_child = false;
+  for (int i = 1; i < argc; i++) {
+    if (strcmp(argv[i], "--child") == 0) {
+      is_child = true;
+      break;
+    }
+  }
+
+  if (is_child) {
+    // child process: run render directly
+    crossdesk::Render render;
+    render.Run();
+    return 0;
+  }
+
+  bool enable_daemon = false;
+  auto path_manager = std::make_unique<crossdesk::PathManager>("CrossDesk");
+  if (path_manager) {
+    std::string cert_path =
+        (path_manager->GetCertPath() / "crossdesk.cn_root.crt").string();
+    std::string cache_path = path_manager->GetCachePath().string();
+    crossdesk::ConfigCenter config_center(cache_path + "/config.ini",
+                                          cert_path);
+    enable_daemon = config_center.IsEnableDaemon();
+  }
+
+  if (enable_daemon) {
+    // start daemon with restart monitoring
+    Daemon daemon("CrossDesk");
+
+    // define main loop function: run render and stop daemon on normal exit
+    Daemon::MainLoopFunc main_loop = [&daemon]() {
+      crossdesk::Render render;
+      render.Run();
+      daemon.stop();
+    };
+
+    // start daemon and return result
+    bool success = daemon.start(main_loop);
+    return success ? 0 : 1;
+  }
+
+  // run without daemon: direct execution
   crossdesk::Render render;
   render.Run();
-
   return 0;
 }