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>

src/app.cpp

@@ -50,6 +50,7 @@
 #include "ui/windows/address_transfer_dialog.h"
 #include "ui/windows/bootstrap_download_dialog.h"
 #include "ui/windows/xmrig_download_dialog.h"
+#include "ui/windows/daemon_download_dialog.h"
 #include "ui/windows/console_tab.h"
 #include "ui/pages/settings_page.h"
 #include "ui/theme.h"
@@ -1923,6 +1924,7 @@ void App::render()
     // Bootstrap download from settings
     ui::BootstrapDownloadDialog::render();
     ui::XmrigDownloadDialog::render();
+    ui::DaemonUpdateDialog::render();
 
     // Windows Defender antivirus help dialog
     renderAntivirusHelpDialog();
@@ -3609,7 +3611,7 @@ void App::renderShutdownScreen()
             force_quit_confirm_ = true;
         }
         if (ImGui::IsItemHovered()) {
-            ImGui::SetTooltip("%s", TR("force_quit_warning"));
+            ui::material::Tooltip("%s", TR("force_quit_warning"));
         }
         ImGui::PopStyleColor(3);
     }