Save book UUID from sync response to doc_settings

main.lua

@@ -848,6 +848,15 @@ function Bookhoard:_doUpdateProgress(interactive)
     UIManager:nextTick(function()
         if ok then
             logger.dbg("Bookhoard: progress pushed successfully")
+            if result and result.book_results then
+                for _, br in ipairs(result.book_results) do
+                    if br.synced and br.book_uuid and br.sha256 == book_data.sha256 then
+                        self.ui.doc_settings:saveSetting("bookhoard_uuid", br.book_uuid)
+                        self.ui.doc_settings:flush()
+                        break
+                    end
+                end
+            end
             if interactive then
                 UIManager:show(InfoMessage:new{
                     text = _("Progress has been pushed."),