docs: Update project context and re-prioritize task list

This commit finalizes the session by updating the project documentation to reflect recent progress and future priorities.

- **Recently Completed**: Summarized the finalization of the audio tracker, implementation of build stripping (STRIP_ALL), and resolution of WebGPU stability issues on macOS.

- **Re-prioritization**: Promoted 'Platform & Code Hygiene' (Task #20) to Priority 1 and established '3D System Enhancements' (Task #18) as Priority 2, focusing on Blender integration.

- **Session Summary**: Appended a detailed summary of the session's key achievements to SESSION_NOTES.md.

1 files changed, 21 insertions, 0 deletions

diff --git a/SESSION_NOTES.md b/SESSION_NOTES.md
index 5ba42f7..4fc265b 100644
--- a/SESSION_NOTES.md
+++ b/SESSION_NOTES.md
@@ -8943,3 +8943,24 @@ The `final` target is now part of the build system. What's next?
 *   The demo now features a working sequencer with embedded drum samples.
 *   Final compressed binary size on macOS is approximately 107KB (with assets).
 *   The project is ready for the next phase of development (cross-compilation or advanced compression).
+
+## SESSION SUMMARY - Tue Feb  3 07:42:59 CET 2026
+
+- **Audio Tracker Finalization**:
+    - Completed the integration of asset-based spectrograms into the pattern tracker.
+    - Implemented a unified pasting strategy in `tracker_update` where all notes and samples are baked into a single voice-buffer per pattern.
+    - Verified timing and drum patterns in `assets/music.track`.
+
+- **Build Optimization & Stripping (Task #8)**:
+    - Implemented `DEMO_STRIP_ALL` CMake option.
+    - `STRIP_ALL` removes CLI parsing, debug labels, error callbacks, and heavy `<iostream>` headers.
+    - Optimized macOS linker flags: Replaced GNU-specific `--gc-sections` with `-dead_strip`.
+
+- **WebGPU Stability (macOS)**:
+    - Fixed `g_surface` assertion failure by adding `-DGLFW_EXPOSE_NATIVE_COCOA` to enable GLFW native handles.
+    - Resolved WebGPU validation errors by explicitly setting `WGPUTextureUsage_RenderAttachment` and initializing `resolveTarget = nullptr` in render pass descriptors.
+
+- **Quality Assurance**:
+    - Added `clang-format` requirement to `CONTRIBUTING.md`.
+    - Verified all tests and builds (native + strip build) pass on macOS.
+