Made Swift 6 local translation support optional.

Telegram/CMakeLists.txt

@@ -97,7 +97,9 @@ PRIVATE
     desktop-app::external_xxhash
 )
 
-telegram_add_apple_swift_runtime(Telegram)
+if (NOT DESKTOP_APP_DISABLE_SWIFT6)
+    telegram_add_apple_swift_runtime(Telegram)
+endif()
 
 target_precompile_headers(Telegram PRIVATE $<$<COMPILE_LANGUAGE:CXX,OBJCXX>:${src_loc}/stdafx.h>)
 nice_target_sources(Telegram ${src_loc}

Telegram/SourceFiles/platform/mac/translate_provider_mac.mm

@@ -7,6 +7,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 */
 #include "platform/mac/translate_provider_mac.h"
 
+#ifndef TDESKTOP_DISABLE_SWIFT6
+
 #include "base/weak_ptr.h"
 #include "spellcheck/platform/platform_language.h"
 #include "translate_provider_mac_swift_bridge.h"
@@ -102,4 +104,19 @@ bool IsTranslateProviderAvailable() {
 	return TranslateProviderMacSwiftIsAvailable();
 }
 
+#else // TDESKTOP_DISABLE_SWIFT6
+
+// Local on-device translation disabled (no Swift 6).
+namespace Platform {
+
+std::unique_ptr<Ui::TranslateProvider> CreateTranslateProvider() {
+	return nullptr;
+}
+
+bool IsTranslateProviderAvailable() {
+	return false;
+}
+
+#endif // TDESKTOP_DISABLE_SWIFT6
+
 } // namespace Platform

Telegram/cmake/telegram_options.cmake

@@ -51,3 +51,8 @@ endif()
 if (DESKTOP_APP_SPECIAL_TARGET)
     target_compile_definitions(Telegram PRIVATE TDESKTOP_ALLOW_CLOSED_ALPHA)
 endif()
+
+option(DESKTOP_APP_DISABLE_SWIFT6 "Disable local on-device translation (build without Swift 6 on macOS)." OFF)
+if (DESKTOP_APP_DISABLE_SWIFT6)
+    target_compile_definitions(Telegram PRIVATE TDESKTOP_DISABLE_SWIFT6)
+endif()