feat: add autosave while editing Mermaid and YfmHtmlblock #852
+184
−38
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before
https://github.com/user-attachments/assets/09645362-1e7f-4a33-827a-81165de7f5dd
after
https://github.com/user-attachments/assets/39d858af-539c-4066-af12-4d72d7f25f50
param
