Complete build wiring and CLI file commands

Align documented commands with the CLI, enable optional GUI/test targets, and remove committed API secrets so the project is safer to build and run.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

dstalk-core/CMakeLists.txt

@@ -32,10 +32,3 @@ target_compile_definitions(dstalk
     PRIVATE DSTALK_BUILD_DLL
     INTERFACE DSTALK_USE_DLL
 )
-
-# Windows: 生成 .lib 导入库和 .dll
-if(WIN32)
-    set_target_properties(dstalk PROPERTIES
-        WINDOWS_EXPORT_ALL_SYMBOLS ON
-    )
-endif()