feat: Remote Process Memory plugin, source menu icons, base address fix

- Remote Process Memory plugin: shared-memory IPC payload injected into
  target process (CreateRemoteThread on Win, ptrace+dlopen on Linux),
  VirtualQuery-based memory safety, PEB-based image base, batch reads
- Source dropdown: SVG icons per provider type, DLL filename shown
- Fix base address not updating when switching to a new source provider
- ProviderRegistry carries DLL filename from PluginManager

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

plugins/RemoteProcessMemory/CMakeLists.txt

@@ -0,0 +1,124 @@
+cmake_minimum_required(VERSION 3.20)
+project(RemoteProcessMemory LANGUAGES CXX)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+# Qt is found by the parent project; QT variable (Qt5 or Qt6) is inherited
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_AUTOUIC OFF)   # run uic manually to avoid dupbuild with ProcessMemoryPlugin
+
+# ─── 1. Payload DLL/SO (no Qt, minimal dependencies) ────────────────
+
+add_library(rcx_payload SHARED
+    payload/rcx_payload.cpp
+    rcx_rpc_protocol.h
+)
+
+set_target_properties(rcx_payload PROPERTIES PREFIX "")  # rcx_payload.dll / rcx_payload.so
+
+target_include_directories(rcx_payload PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
+
+if(WIN32)
+    target_link_libraries(rcx_payload PRIVATE psapi)
+else()
+    target_link_libraries(rcx_payload PRIVATE pthread rt)
+    target_compile_options(rcx_payload PRIVATE -fvisibility=hidden)
+endif()
+
+# Output payload to Plugins/ (same dir as plugin DLL, discovered at runtime)
+set_target_properties(rcx_payload PROPERTIES
+    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/Plugins"
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/Plugins"
+)
+
+# Install rule: copy both DLLs to install Plugins/ folder
+install(TARGETS rcx_payload
+    LIBRARY DESTINATION Plugins
+    RUNTIME DESTINATION Plugins
+)
+
+# ─── 2. Plugin DLL (Qt, implements IProviderPlugin) ──────────────────
+
+# Generate ui_processpicker.h in our own build dir (avoids dupbuild with ProcessMemoryPlugin)
+set(_UI_SRC "${CMAKE_CURRENT_SOURCE_DIR}/../../src/processpicker.ui")
+set(_UI_HDR "${CMAKE_CURRENT_BINARY_DIR}/ui_processpicker.h")
+
+add_custom_command(
+    OUTPUT  "${_UI_HDR}"
+    COMMAND ${QT}::uic -o "${_UI_HDR}" "${_UI_SRC}"
+    DEPENDS "${_UI_SRC}"
+    COMMENT "UIC processpicker.ui (RemoteProcessMemory)"
+    VERBATIM
+)
+
+set(PLUGIN_SOURCES
+    RemoteProcessMemoryPlugin.h
+    RemoteProcessMemoryPlugin.cpp
+    rcx_rpc_protocol.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/../../src/processpicker.h
+    ${CMAKE_CURRENT_SOURCE_DIR}/../../src/processpicker.cpp
+    "${_UI_HDR}"
+)
+
+add_library(RemoteProcessMemoryPlugin SHARED ${PLUGIN_SOURCES})
+
+target_link_libraries(RemoteProcessMemoryPlugin PRIVATE
+    ${QT}::Widgets
+    ${_QT_WINEXTRAS}
+)
+
+if(WIN32)
+    target_link_libraries(RemoteProcessMemoryPlugin PRIVATE psapi shell32)
+else()
+    target_link_libraries(RemoteProcessMemoryPlugin PRIVATE rt dl)
+    target_compile_options(RemoteProcessMemoryPlugin PRIVATE -fvisibility=hidden)
+endif()
+
+target_include_directories(RemoteProcessMemoryPlugin PRIVATE
+    ${CMAKE_CURRENT_SOURCE_DIR}/../../src
+    ${CMAKE_CURRENT_SOURCE_DIR}
+    ${CMAKE_CURRENT_BINARY_DIR}   # for ui_processpicker.h
+)
+
+set_target_properties(RemoteProcessMemoryPlugin PROPERTIES
+    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/Plugins"
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/Plugins"
+)
+
+install(TARGETS RemoteProcessMemoryPlugin
+    LIBRARY DESTINATION Plugins
+    RUNTIME DESTINATION Plugins
+)
+
+# Plugin must be able to find the payload at runtime
+add_dependencies(RemoteProcessMemoryPlugin rcx_payload)
+
+# ─── 3. Test executables (no Qt) ────────────────────────────────────
+
+# Host: loads payload in-process, exposes test buffer
+add_executable(test_rpc_host tests/test_rpc_host.cpp)
+target_include_directories(test_rpc_host PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
+if(WIN32)
+    target_link_libraries(test_rpc_host PRIVATE psapi)
+else()
+    target_link_libraries(test_rpc_host PRIVATE pthread rt dl)
+endif()
+set_target_properties(test_rpc_host PROPERTIES
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/Plugins"
+)
+add_dependencies(test_rpc_host rcx_payload)
+
+# Client: connects to host, tests + benchmarks
+add_executable(test_rpc_client tests/test_rpc_client.cpp)
+target_include_directories(test_rpc_client PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
+if(WIN32)
+    target_link_libraries(test_rpc_client PRIVATE psapi)
+else()
+    target_link_libraries(test_rpc_client PRIVATE pthread rt)
+endif()
+set_target_properties(test_rpc_client PROPERTIES
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/Plugins"
+)
+add_dependencies(test_rpc_client test_rpc_host)