fix: no blocks data conversion if no data loss detected

res/texts/en_US.txt

@@ -3,6 +3,7 @@ menu.missing-content=Missing Content!
 world.convert-request=Content indices have changed! Convert world files?
 world.upgrade-request=World format is outdated! Convert world files?
 world.convert-with-loss=Convert world with data loss?
+world.convert-block-layouts=Blocks fields have changes! Convert world files?
 pack.remove-confirm=Do you want to erase all pack(s) content from the world forever?
 error.pack-not-found=Could not to find pack
 error.dependency-not-found=Dependency pack is not found

res/texts/ru_RU.txt

@@ -48,6 +48,7 @@ world.Create World=Создать Мир
 world.convert-request=Есть изменения в индексах! Конвертировать мир?
 world.upgrade-request=Формат мира устарел! Конвертировать мир?
 world.convert-with-loss=Конвертировать мир с потерями?
+world.convert-block-layouts=Есть изменения в полях блоков! Конвертировать мир?
 world.delete-confirm=Удалить мир безвозвратно?
 
 # Настройки

src/content/ContentReport.cpp

@@ -81,6 +81,9 @@ std::shared_ptr<ContentReport> ContentReport::create(
                 );
             }
         }
+        if (layout != *def->dataStruct) {
+            report->dataLayoutsUpdated = true;
+        }
         report->blocksDataLayouts[name] = std::move(layout);
     }
 
@@ -89,7 +92,7 @@ std::shared_ptr<ContentReport> ContentReport::create(
     if (report->isUpgradeRequired() || 
         report->hasContentReorder() || 
         report->hasMissingContent() ||
-        report->hasDataLoss()) {
+        report->hasUpdatedLayouts()) {
         return report;
     } else {
         return nullptr;

src/content/ContentReport.hpp

@@ -128,6 +128,8 @@ public:
     std::vector<ContentIssue> issues;
     std::vector<std::string> dataLoss;
 
+    bool dataLayoutsUpdated = false;
+
     ContentReport(
         const ContentIndices* indices, 
         size_t blocks, 
@@ -144,6 +146,9 @@ public:
     inline const std::vector<std::string>& getDataLoss() const {
         return dataLoss;
     }
+    inline bool hasUpdatedLayouts() {
+        return dataLayoutsUpdated;
+    }
 
     inline bool hasContentReorder() const {
         return blocks.hasContentReorder() || items.hasContentReorder();

src/data/StructLayout.cpp

@@ -273,6 +273,9 @@ size_t StructLayout::setUnicode(
     size_t size = util::crop_utf8(text, field.elements);
     auto ptr = reinterpret_cast<char*>(dst + field.offset);
     std::memcpy(ptr, value.data(), size);
+    if (size < field.elements) {
+        ptr[size] = '\0';
+    }
     return size;
 }
 

src/logic/EngineController.cpp

@@ -80,6 +80,9 @@ void show_convert_request(
         };
 
     std::wstring message = L"world.convert-request";
+    if (report->hasUpdatedLayouts()) {
+        message = L"world.convert-block-layouts";
+    }
     if (report->isUpgradeRequired()) {
         message = L"world.upgrade-request";
     } else if (report->hasDataLoss()) {