fix: WinDbg provider stops auto-selecting module, new tabs inherit source

- WinDbg provider no longer picks arbitrary module[0] as name/base
  (was showing "WS2_32" for kernel dumps). Name is now generic
  "WinDbg (Live)" / "WinDbg (Dump)", base stays 0 so controller
  doesn't override user's address.
- Added throttled read failure logging to WinDbg provider.
- New tabs (File→New Class, workspace right-click) inherit the
  current tab's source/provider so users don't have to re-attach.
- Updated WinDbg provider tests for new behavior.

CMakeLists.txt

@@ -372,6 +372,21 @@ if(BUILD_TESTING)
     target_link_libraries(test_options_dialog PRIVATE ${QT}::Widgets ${QT}::Test)
     add_test(NAME test_options_dialog COMMAND test_options_dialog)
 
+    add_executable(test_source_provider tests/test_source_provider.cpp
+        src/editor.cpp src/compose.cpp src/format.cpp src/addressparser.cpp src/controller.cpp
+        src/processpicker.cpp src/processpicker.ui src/providerregistry.cpp
+        src/typeselectorpopup.cpp
+        src/themes/theme.cpp src/themes/thememanager.cpp ${DISASM_SRCS}
+        src/resources.qrc)
+    target_include_directories(test_source_provider PRIVATE src third_party/fadec)
+    target_link_libraries(test_source_provider PRIVATE
+        ${QT}::Widgets ${QT}::PrintSupport ${QT}::Concurrent ${QT}::Test ${QT}::Svg
+        QScintilla::QScintilla)
+    if(WIN32)
+        target_link_libraries(test_source_provider PRIVATE dbghelp psapi ${_QT_WINEXTRAS})
+    endif()
+    add_test(NAME test_source_provider COMMAND test_source_provider)
+
     if(WIN32)
         add_executable(test_windbg_provider tests/test_windbg_provider.cpp
             plugins/WinDbgMemory/WinDbgMemoryPlugin.cpp)
@@ -381,6 +396,19 @@ if(BUILD_TESTING)
         add_test(NAME test_windbg_provider COMMAND test_windbg_provider)
     endif()
 
+    add_executable(bench_large_class tests/bench_large_class.cpp
+        src/editor.cpp src/compose.cpp src/format.cpp src/addressparser.cpp
+        src/providerregistry.cpp
+        src/themes/theme.cpp src/themes/thememanager.cpp ${DISASM_SRCS})
+    target_include_directories(bench_large_class PRIVATE src third_party/fadec)
+    target_link_libraries(bench_large_class PRIVATE
+        ${QT}::Widgets ${QT}::PrintSupport ${QT}::Concurrent ${QT}::Test
+        QScintilla::QScintilla)
+    if(WIN32)
+        target_link_libraries(bench_large_class PRIVATE dbghelp psapi ${_QT_WINEXTRAS})
+    endif()
+    add_test(NAME bench_large_class COMMAND bench_large_class)
+
     # Deploy Qt runtime DLLs for tests (run windeployqt on a representative test exe
     # that links the broadest set of Qt modules; all test exes share the same output dir)
     if(TARGET ${QT}::windeployqt)