fix: add xdgTag as a new indicator

Author: yuukibarns

src/config/ConfigManager.hpp

@@ -142,10 +142,18 @@ struct SFloatCache {
     size_t hash;
 
     SFloatCache(PHLWINDOW window, bool initial) {
-        if (initial)
-            hash = std::hash<std::string>{}(window->m_initialClass) ^ (std::hash<std::string>{}(window->m_initialTitle) << 1);
-        else
-            hash = std::hash<std::string>{}(window->m_class) ^ (std::hash<std::string>{}(window->m_title) << 1);
+        // Base hash from class/title
+        size_t baseHash = initial ? (std::hash<std::string>{}(window->m_initialClass) ^ (std::hash<std::string>{}(window->m_initialTitle) << 1)) :
+                                    (std::hash<std::string>{}(window->m_class) ^ (std::hash<std::string>{}(window->m_title) << 1));
+
+        // Use empty string as default tag value
+        std::string tagValue = "";
+        if (auto xdgTag = window->xdgTag()) {
+            tagValue = xdgTag.value();
+        }
+
+        // Combine hashes
+        hash = baseHash ^ (std::hash<std::string>{}(tagValue) << 2);
     }
 
     bool operator==(const SFloatCache& other) const {