add SNI custom icon manager

include/modules/sni/icon_manager.hpp

@@ -0,0 +1,43 @@
+#pragma once
+
+#include <json/json.h>
+#include <spdlog/spdlog.h>
+
+#include <string>
+#include <unordered_map>
+
+class IconManager {
+ public:
+  static IconManager& instance() {
+    static IconManager instance;
+    return instance;
+  }
+
+  void setIconsConfig(const Json::Value& icons_config) {
+    if (icons_config.isObject()) {
+      for (const auto& key : icons_config.getMemberNames()) {
+        std::string app_name = key;
+        const Json::Value& icon_value = icons_config[key];
+
+        if (icon_value.isString()) {
+          std::string icon_path = icon_value.asString();
+          icons_map_[app_name] = icon_path;
+        }
+      }
+    } else {
+      spdlog::warn("Invalid icon config format.");
+    }
+  }
+
+  std::string getIconForApp(const std::string& app_name) const {
+    auto it = icons_map_.find(app_name);
+    if (it != icons_map_.end()) {
+      return it->second;
+    }
+    return "";
+  }
+
+ private:
+  IconManager() = default;
+  std::unordered_map<std::string, std::string> icons_map_;
+};