docs: Synchronize project state for Asset System milestone

Updates documentation and context to reflect the completed Asset Management System, production build pipeline, and visual improvements.

- Updated PROJECT_CONTEXT.md with detailed architectural and build system decisions.

- Added milestone summary to SESSION_NOTES.md.

- Expanded GEMINI.md context file list.

1 files changed, 2 insertions, 0 deletions

diff --git a/GEMINI.md b/GEMINI.md
index cd4ca4b..2bc669e 100644
--- a/GEMINI.md
+++ b/GEMINI.md
@@ -5,5 +5,7 @@
 @FETCH_DEPS.md
 @CONTRIBUTING.md
 @HOWTO.md
+@src/util/asset_manager.h
+@tools/asset_packer.cc
 @tools/spectool.cc
 @tools/specview.cc