Merge pull request 'perf(image): release static texture staging after upload (#114)' (#136) from claude/issue-114 into master

implementations/Crafter.Graphics-FontAtlas.cpp

@@ -39,7 +39,11 @@ void FontAtlas::Initialize(GraphicsCommandBuffer cmd) {
         VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL,
         // The atlas is sampled by the UI text *compute* shader, not an RT
         // pipeline — scope the upload barriers to the real consumer.
-        VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT
+        VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT,
+        // Streamed: glyphs are rasterized into buffer.value on the CPU and
+        // re-uploaded every frame via UpdateRegion, so the persistent staging
+        // map must outlive the first upload rather than being released (#114).
+        /*streamed*/ true
     );
     std::memset(image.buffer.value, 0, kAtlasSize * kAtlasSize);
 #else