feat: blockchain rescan via daemon restart + status bar progress

- Fix z_importwallet to use full path instead of filename only
- Add rescanBlockchain() method that restarts daemon with -rescan flag
- Track rescan progress via daemon output parsing and getrescaninfo RPC
- Display rescan progress in status bar with animated indicator when starting
- Improve dark theme card contrast: lighter surface-variant, tinted borders, stronger rim-light

src/ui/windows/about_dialog.cpp

@@ -5,8 +5,6 @@
 #include "about_dialog.h"
 #include "../../app.h"
 #include "../../config/version.h"
-#include "../theme.h"
-#include "../effects/imgui_acrylic.h"
 #include "../schema/ui_schema.h"
 #include "../material/type.h"
 #include "../material/draw_helpers.h"
@@ -25,16 +23,7 @@ void RenderAboutDialog(App* app, bool* p_open)
     auto versionLbl = S.label("dialogs.about", "version-label");
     auto editionLbl = S.label("dialogs.about", "edition-label");
     
-    ImGui::SetNextWindowSize(ImVec2(win.width, win.height), ImGuiCond_FirstUseEver);
-    ImVec2 center = ImGui::GetMainViewport()->GetCenter();
-    ImGui::SetNextWindowPos(center, ImGuiCond_Appearing, ImVec2(0.5f, 0.5f));
-    
-    // Use acrylic modal popup from current theme
-    const auto& acrylicTheme = GetCurrentAcrylicTheme();
-    ImGui::OpenPopup("About ObsidianDragon");
-    if (!effects::ImGuiAcrylic::BeginAcrylicPopupModal("About ObsidianDragon", p_open, 
-            ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoTitleBar, acrylicTheme.popup)) {
-        effects::ImGuiAcrylic::EndAcrylicPopup();
+    if (!material::BeginOverlayDialog("About ObsidianDragon", p_open, win.width, 0.94f)) {
         return;
     }
 
@@ -173,7 +162,7 @@ void RenderAboutDialog(App* app, bool* p_open)
     }
 
     ImGui::PopFont(); // Body2
-    effects::ImGuiAcrylic::EndAcrylicPopup();
+    material::EndOverlayDialog();
 }
 
 } // namespace ui