Leaf Note

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Added two new synchronization methods, OneDrive and DropBox
Added voice notes
Added doodle board
Added the function of converting web pages to Markdown
Added AI chat function for notes
Added end-to-end encryption function for notes
Support Mermaid flowcharts
Support TODO clicks
Custom fonts
Optimized label scanning logic
Optimized application size and performance
Optimized visual and interactive features
Fixed other issues