feat(updater): in-app dragonxd updater + browse-all-releases

Add a full-node daemon updater (util/DaemonUpdater + daemon_download_dialog)
reachable from Settings -> NODE & SECURITY: downloads/verifies (SHA-256 +
enforced ed25519 signature) and atomically installs the latest dragonxd from
the project Gitea, with a "Restart daemon now" step. Add a shared "Browse all
releases..." picker (release_list_view) to both the miner and daemon updaters
so users can pin older/pre-release builds. Pure no-I/O cores
(daemon_updater_core / xmrig_updater_core) are unit-tested; sign-daemon-release.sh
signs release archives offline.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

CMakeLists.txt

@@ -502,6 +502,8 @@ set(APP_SOURCES
     src/util/lite_server_probe.cpp
     src/util/xmrig_updater.cpp
     src/util/xmrig_updater_core.cpp
+    src/util/daemon_updater.cpp
+    src/util/daemon_updater_core.cpp
     src/util/secure_vault.cpp
     src/ui/effects/framebuffer.cpp
     src/ui/effects/blur_shader.cpp
@@ -744,6 +746,30 @@ if(DRAGONX_LITE_BACKEND_READY)
     if(UNIX)
         target_link_libraries(lite_smoke PRIVATE ${CMAKE_DL_LIBS} pthread)
     endif()
+
+    # Real-backend SEND smoke tool — drives the exact GUI send path (bridge.execute("send", ...)).
+    add_executable(lite_send_smoke
+        tools/lite_send_smoke.cpp
+        src/wallet/lite_client_bridge.cpp
+        src/wallet/lite_owned_string.cpp
+        src/wallet/lite_rollout_policy.cpp
+        src/wallet/lite_connection_service.cpp
+        src/wallet/lite_result_parsers.cpp
+    )
+    target_include_directories(lite_send_smoke PRIVATE
+        ${CMAKE_SOURCE_DIR}/src
+        ${CMAKE_BINARY_DIR}/generated
+        ${SODIUM_INCLUDE_DIR}
+    )
+    target_compile_definitions(lite_send_smoke PRIVATE DRAGONX_ENABLE_LITE_BACKEND=1)
+    target_link_libraries(lite_send_smoke PRIVATE
+        dragonx_lite_backend ${DRAGONX_LITE_BACKEND_EXTRA_LIBS}
+        nlohmann_json::nlohmann_json
+        ${SODIUM_LIBRARY}
+    )
+    if(UNIX)
+        target_link_libraries(lite_send_smoke PRIVATE ${CMAKE_DL_LIBS} pthread)
+    endif()
 endif()
 
 # Platform-specific settings
@@ -1011,6 +1037,8 @@ if(BUILD_TESTING)
         src/util/lite_server_probe.cpp
         src/util/xmrig_updater.cpp
         src/util/xmrig_updater_core.cpp
+        src/util/daemon_updater.cpp
+        src/util/daemon_updater_core.cpp
         ${MINIZ_SOURCES}
     )