fix: SDL2 Linux port - fix black screen by setting CWD to binary path

CMakeLists.txt

@@ -7,6 +7,12 @@ project(tank_battles_on_the_scrap_paper
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
+# ── SDL2 依赖 ──
+find_package(SDL2 REQUIRED)
+find_package(SDL2_image REQUIRED)
+find_package(SDL2_mixer REQUIRED)
+find_package(SDL2_ttf REQUIRED)
+
 # ── 源文件 ──
 set(SOURCES
     tank_battles_on_the_scrap_paper/main.cpp
@@ -18,45 +24,18 @@ set(HEADERS
     tank_battles_on_the_scrap_paper/tank.h
     tank_battles_on_the_scrap_paper/map.h
     tank_battles_on_the_scrap_paper/data_config.h
-    tank_battles_on_the_scrap_paper/resource.h
 )
 
 # ── 可执行文件 ──
-add_executable(${PROJECT_NAME} ${SOURCES} ${HEADERS}
-    tank_battles_on_the_scrap_paper/resource.rc
+add_executable(${PROJECT_NAME} ${SOURCES} ${HEADERS})
+
+target_link_libraries(${PROJECT_NAME} PRIVATE
+    SDL2::SDL2
+    SDL2_image::SDL2_image
+    SDL2_mixer::SDL2_mixer
+    SDL2_ttf::SDL2_ttf
 )
 
-# ── Windows 特定配置 ──
-if(WIN32)
-    # EasyX 图形库
-    target_include_directories(${PROJECT_NAME} PRIVATE
-        ${EASYX_INCLUDE_DIR}
-    )
-
-    # Windows 多媒体库
-    target_link_libraries(${PROJECT_NAME} PRIVATE
-        winmm.lib
-        gdi32.lib
-    )
-
-    # 控制台子系统
-    set_target_properties(${PROJECT_NAME} PROPERTIES
-        WIN32_EXECUTABLE FALSE
-    )
-
-    target_compile_definitions(${PROJECT_NAME} PRIVATE
-        _CONSOLE
-        _UNICODE
-        UNICODE
-    )
-else()
-    # 非 Windows 平台给出提示
-    message(WARNING
-        "${PROJECT_NAME} 依赖 EasyX (Windows-only 图形库)，"
-        "当前平台不支持编译。仅生成项目结构参考。"
-    )
-endif()
-
 # ── 复制资源文件到构建目录 ──
 file(COPY
     tank_battles_on_the_scrap_paper/images/