Speed up Windows installer compression

tools/chatgui/installer/vibechat.iss

@@ -20,7 +20,9 @@ ArchitecturesInstallIn64BitMode=x64compatible
 MinVersion=10.0
 PrivilegesRequired=admin
 OutputBaseFilename=VibeChat-{#AppVersion}-win64-setup
-Compression=lzma2
+; Умеренное сжатие и два параллельных блока ускоряют упаковку EXE/DLL.
+Compression=lzma2/normal
+LZMANumBlockThreads=2
 SolidCompression=yes
 WizardStyle=modern
 UninstallDisplayIcon={app}\vibechat.exe

tools/chatgui/package_win.sh

@@ -166,10 +166,12 @@ if [[ "$HAS_FFMPEG" = 1 ]]; then
 fi
 
 echo "INFO: compiling VibeChat $APP_VERSION installer (Qt package: $QT_PACKAGE)"
+COMPILE_STARTED=$SECONDS
 # MSYS2 не должен преобразовывать ключи /D и /O; пути передаём явно в Windows-формате.
 MSYS2_ARG_CONV_EXCL='*' "$ISCC" "/DAppVersion=$APP_VERSION" "/DPackageDir=$(cygpath -w "$PACKAGE_DIR")" \
     "/O$(cygpath -w "$STAGE/output")" "$(cygpath -w "$SRC_DIR/installer/vibechat.iss")"
 INSTALLER_NAME="VibeChat-$APP_VERSION-win64-setup.exe"
 [[ -s "$STAGE/output/$INSTALLER_NAME" ]] || { echo "ERROR: compiler did not produce $INSTALLER_NAME" >&2; exit 1; }
+echo "INFO: installer compilation completed: elapsed=$((SECONDS - COMPILE_STARTED))s"
 mv -f "$STAGE/output/$INSTALLER_NAME" "$BUILD_DIR/installer/$INSTALLER_NAME"
 echo "INFO: installer created: $BUILD_DIR/installer/$INSTALLER_NAME"