落地映像读写：72 字节头、段布局、FNV-1a、.stb 与 sidecar。

- 指令与映像.md 冻结：头字段表、常量表/函数表行、段序、数据段对齐、sidecar 格式
- Types.h 补 TypeTag；Image.h/cpp：ImageView 校验、write_ret_main、文件与 sidecar
- isa CMake 改 target_include_directories PUBLIC

isa/CMakeLists.txt

@@ -10,7 +10,8 @@ project(ISA
 set(CMAKE_C_STANDARD 11)
 set(CMAKE_CXX_STANDARD 11)
 
-include_directories(./include)
-
 add_library(isa STATIC
-            ./src/Encode.cpp)
+            ./src/Encode.cpp
+            ./src/Image.cpp)
+
+target_include_directories(isa PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/include)