Merge commit '6b0a56d5d66032c4d150c76c2b6a537930a5c5fa'

31b39982 [keel] Fix AssetRef to call incRef on initial creation of ref, not just copy
5476417b [nostalgia] Add release notes for d2025.07.0
e03be694 Merge commit 'b67b95767b7bfcd5f618ebc8e14ddbc83edcbe36'
490c0368 [nostalgia/gfx] Add lists for file extensions
a24fc407 [ox/std] Fix MSVC build

git-subtree-dir: deps/nostalgia
git-subtree-split: 31b39982c5ead87da1727bc1f561b945e4d1e5fb

deps/nostalgia/release-notes.md

@@ -1,3 +1,9 @@
+# d2025.07.0
+
+* Add sub-command for exporting TileSheets as PNG files.
+* Add 'Reload Project' menu item under File.
+* Fix opening a project to mark an unopenable file as closed in the config file on startup.
+
 # d2025.06.0
 
 * Add ability to remember recent projects in config

deps/nostalgia/src/olympic/keel/include/keel/assetmanager.hpp

@@ -64,11 +64,13 @@ class AssetContainer {
 
 	protected:
 		constexpr void incRefs() const noexcept {
+			oxAssert(m_references < ox::MaxValue<decltype(m_references)>, "reference count exceeds maximum");
 			++m_references;
 		}
 
 		constexpr void decRefs() const noexcept {
 			--m_references;
+			oxAssert(m_references >= 0, "negative references");
 		}
 
 		[[nodiscard]]
@@ -162,6 +164,7 @@ template<typename T>
 constexpr AssetRef<T>::AssetRef(AssetContainer<T> const*c) noexcept: m_ctr(c) {
 	if (m_ctr) {
 		m_ctr->updated.connect(this, &AssetRef::emitUpdated);
+		m_ctr->incRefs();
 	}
 }