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, 11 insertions, 4 deletions

diff --git a/PROJECT_CONTEXT.md b/PROJECT_CONTEXT.md
index acc0b43..7664d9c 100644
--- a/PROJECT_CONTEXT.md
+++ b/PROJECT_CONTEXT.md
@@ -41,12 +41,19 @@ Incoming tasks in no particular order:
 ## Session Decisions and Current State
 
 ### Asset Management System:
-- **Architecture**: Implemented a C++ tool (`asset_packer`) that bundles external files into the binary.
-- **Descriptors**: Assets are defined in `assets/final/assets.txt` with optional compression settings.
-- **Runtime Access**: Provides a type-safe `AssetId` enum and `GetAsset` function for retrieving raw byte data at runtime.
-- **Integration**: Fully integrated into the CMake build process with automatic header/source generation.
+- **Architecture**: Implemented a C++ tool (`asset_packer`) that bundles external files into hex-encoded C arrays.
+- **Lookup**: Uses a highly efficient array-based lookup (AssetRecord) for O(1) retrieval of raw byte data at runtime.
+- **Descriptors**: Assets are defined in `assets/final/demo_assets.txt` (for the demo) and `assets/final/test_assets_list.txt` (for tests).
+- **Organization**: Common retrieval logic is decoupled and located in `src/util/asset_manager.cc`, ensuring generated data files only contain raw binary blobs.
 - **Lazy Decompression**: Scaffolding implemented for future on-demand decompression support.
 
+### Build System:
+- **Production Pipeline**: Automated the entire assembly process via a `final` CMake target (`make final`).
+- **Automation**: This target builds the tools, runs the `gen_assets.sh` script to re-analyze audio and regenerate sources, and then performs final binary stripping and crunching (using `strip` and `gzexe` on macOS).
+- **Scripts**: 
+    - `scripts/gen_assets.sh`: Re-analyzes source audio files into `.spec` format and triggers the `asset_packer`.
+    - `scripts/crunch_demo.sh`: Performs the final size optimization and compression.
+
 ### Audio Engine (Synth):
 - **Architecture**: Real-time additive synthesis from spectrograms using Inverse Discrete Cosine Transform (IDCT).
 - **Dynamic Updates**: Implemented a double-buffering (flip-flop) mechanism for thread-safe, real-time updates of spectrogram data. The main thread writes to a back buffer, which is then atomically swapped to become the active front buffer for the audio thread, avoiding real-time allocations and locks.