feat(editor): writer surgical del bloc data: al YAML del tilemap

CMakeLists.txt

@@ -92,6 +92,7 @@ set(APP_SOURCES
     source/game/entities/player.cpp
     source/game/map/map.cpp
     source/game/map/tilemap.cpp
+    source/game/map/tilemap_writer.cpp
     ${ENTITY_SOURCES}
     # Fitxer només del binari principal: `loadFromLevel` depèn de
     # Resource::Cache (→ Surface → GIF → àudio). Separat per no arrossegar
@@ -327,4 +328,19 @@ if(BUILD_TESTS)
     add_test(NAME scene_flow
              COMMAND test_scene_flow
              WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})
+
+    # Smoke del writer surgical del tilemap (escriu el bloc `data:` sense
+    # tocar la resta del fitxer). Pura manipulació de text, zero
+    # dependències: no cal ni SDL ni el Resource::Cache.
+    add_executable(test_tilemap_writer
+        tests/test_tilemap_writer.cpp
+        source/game/map/tilemap_writer.cpp
+    )
+    target_include_directories(test_tilemap_writer PRIVATE
+        "${CMAKE_SOURCE_DIR}/source"
+    )
+    target_compile_options(test_tilemap_writer PRIVATE -Wall -Wextra -Wpedantic)
+    add_test(NAME tilemap_writer
+             COMMAND test_tilemap_writer
+             WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})
 endif()