feat(assets): Implement procedural asset generation pipeline

- Updated asset_packer to parse PROC(...) syntax.
- Implemented runtime dispatch in AssetManager for procedural generation.
- Added procedural generator functions (noise, grid, periodic).
- Added comprehensive tests for procedural asset lifecycle.

1 files changed, 9 insertions, 3 deletions

diff --git a/src/util/asset_manager.h b/src/util/asset_manager.h
index 6b09430..00aafc0 100644
--- a/src/util/asset_manager.h
+++ b/src/util/asset_manager.h
@@ -8,10 +8,16 @@
 
 enum class AssetId : uint16_t; // Forward declaration
 
+// Type for procedural generation functions: (buffer, width, height, params, num_params)
+typedef void (*ProcGenFunc)(uint8_t*, int, int, const float*, int);
+
 struct AssetRecord {
-  const uint8_t* data;
-  size_t size;
-  bool is_procedural; // Flag to indicate if memory was allocated dynamically
+  const uint8_t* data;       // Pointer to asset data (static or dynamic)
+  size_t size;               // Size of the asset data
+  bool is_procedural;        // True if data was dynamically allocated by a procedural generator
+  const char* proc_func_name_str; // Name of procedural generation function (string literal)
+  const float* proc_params;  // Parameters for procedural generation (static, from assets.txt)
+  int num_proc_params;       // Number of procedural parameters
 };
 
 // Generic interface