Stabilize Conan build and remove stale TLS code

Simplifies the active Windows build path around Boost.Beast/OpenSSL, fixes VS2017/clang-cl compatibility, and removes unused BearSSL/WinHTTP remnants so the project builds and tests cleanly.

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

dstalk-core/CMakeLists.txt

@@ -3,14 +3,15 @@
 # 包含: 网络通讯 / AI接口 / 文件读写
 # ============================================================
 
-find_package(Boost CONFIG REQUIRED)
-find_package(OpenSSL CONFIG REQUIRED)
+find_package(Boost REQUIRED CONFIG)
+find_package(OpenSSL REQUIRED CONFIG)
 
 add_library(dstalk SHARED
     src/api.cpp
     src/file/file_io.cpp
     src/net/http_client.cpp
     src/ai/deepseek_api.cpp
+    src/boost_json.cpp
 )
 
 target_include_directories(dstalk
@@ -20,15 +21,17 @@ target_include_directories(dstalk
 
 target_link_libraries(dstalk
     PRIVATE
-        Boost::boost
-        Boost::system
-        Boost::json
-        OpenSSL::SSL
-        OpenSSL::Crypto
+        boost::boost
+        openssl::openssl
 )
 
 # 导出 DLL 符号宏
 target_compile_definitions(dstalk
-    PRIVATE DSTALK_BUILD_DLL
-    INTERFACE DSTALK_USE_DLL
+    PRIVATE
+        DSTALK_BUILD_DLL
+        BOOST_ALL_NO_LIB
+        BOOST_ERROR_CODE_HEADER_ONLY
+        BOOST_JSON_HEADER_ONLY
+    INTERFACE
+        DSTALK_USE_DLL
 )