W21: anthropic Stream+Tools + --prompt batch + sanitizer fix + plugin unit tests (W21.1-W21.6)

- W21.1: ci-sanitize preset 独立 Linux-clang + ci-threadsan (TSan)
- W21.2: anthropic tool_use content_block 解析 + configure 缓存 tools_json
- W21.3: --prompt 非交互批处理模式
- W21.4: session auto-save 失败告警 + 当前目录 fallback
- W21.5: smoke 补 tool_calls 边界用例 4 块 12 断言
- W21.6: anthropic 11 块 78 CHECK + deepseek 12 块 78 CHECK

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

tests/CMakeLists.txt

@@ -123,3 +123,57 @@ target_link_libraries(dstalk-plugin-loader-test
 )
 
 add_test(NAME dstalk-plugin-loader-test COMMAND dstalk-plugin-loader-test)
+
+# ============================================================
+# dstalk-anthropic-plugin-test — Anthropic AI 插件单元测试
+# W21.6 (qa-wang): 通过 #include source 访问 static 函数
+# ============================================================
+
+add_executable(dstalk-anthropic-plugin-test
+    anthropic_plugin_test.cpp
+)
+
+target_include_directories(dstalk-anthropic-plugin-test
+    PRIVATE ${CMAKE_SOURCE_DIR}/dstalk-core/include
+)
+
+target_compile_definitions(dstalk-anthropic-plugin-test
+    PRIVATE
+        BOOST_JSON_HEADER_ONLY
+        BOOST_ALL_NO_LIB
+)
+
+target_link_libraries(dstalk-anthropic-plugin-test
+    PRIVATE
+        dstalk
+        boost::boost
+)
+
+add_test(NAME dstalk-anthropic-plugin-test COMMAND dstalk-anthropic-plugin-test)
+
+# ============================================================
+# dstalk-deepseek-plugin-test — DeepSeek AI 插件单元测试
+# W21.6 (qa-wang): 通过 #include source 访问 static 函数
+# ============================================================
+
+add_executable(dstalk-deepseek-plugin-test
+    deepseek_plugin_test.cpp
+)
+
+target_include_directories(dstalk-deepseek-plugin-test
+    PRIVATE ${CMAKE_SOURCE_DIR}/dstalk-core/include
+)
+
+target_compile_definitions(dstalk-deepseek-plugin-test
+    PRIVATE
+        BOOST_JSON_HEADER_ONLY
+        BOOST_ALL_NO_LIB
+)
+
+target_link_libraries(dstalk-deepseek-plugin-test
+    PRIVATE
+        dstalk
+        boost::boost
+)
+
+add_test(NAME dstalk-deepseek-plugin-test COMMAND dstalk-deepseek-plugin-test)