feat: show skip offer countdown and transitions

Sources/Core/progress_reporter.cpp

@@ -293,12 +293,12 @@ ProgressReports::ProgressReports(const std::string &path)
     : single(std::make_unique<ProgressReporter>(path)), active(single.get()) {}
 
 void ProgressReports::registerFile(const std::string &identity, const std::string &path) {
+    std::lock_guard lock(mutex);
     if (single || !ProgressReporter::validMediaIdentity(identity) || entries.size() >= 4096 ||
         path.empty() || path.front() != '/' || path.find('\0') != std::string::npos ||
         entries.contains(identity))
         throw std::runtime_error("Invalid or duplicate queue progress registration");
-    for (const auto &[key, entry] : entries)
-        if (entry.path == path) throw std::runtime_error("Duplicate queue progress report path");
+    if (!paths.insert(path).second) throw std::runtime_error("Duplicate queue progress report path");
     entries.emplace(identity, Entry{path, nullptr});
 }
 

Sources/Core/progress_reporter.hpp

@@ -9,6 +9,7 @@
 #include <string>
 #include <map>
 #include <memory>
+#include <set>
 #include <sys/types.h>
 #include <string_view>
 #include <thread>
@@ -82,6 +83,7 @@ private:
     struct Entry { std::string path; std::unique_ptr<ProgressReporter> reporter; };
     std::unique_ptr<ProgressReporter> single;
     std::map<std::string, Entry> entries;
+    std::set<std::string> paths;
     ProgressReporter *active = nullptr;
     mutable std::mutex mutex;
     std::string failure;