--- a/src/heatmap.h	Fri Feb 06 16:23:50 2026 +0100
+++ b/src/heatmap.h	Fri Feb 06 18:44:47 2026 +0100
@@ -59,7 +59,7 @@
         return m_heatmap;
     }
 
-    [[nodiscard]] std::array<unsigned int, 12> commits_per_month(
+    [[nodiscard]] std::array<commit_summary, 12> commits_per_month(
         const std::string &repo,
         const std::string& author,
         std::chrono::year year