Cache Todo Data in Local Storage for Better Performance and Experiences

[stanleyowen]

Is your feature request related to a problem? Please describe.
Every users' will get frustrated when a website loads really really slow, especially when frontend is fetching data from server.

Describe the solution you'd like
Showing the Data Task List faster and safer.

Describe alternatives you've considered
Saving data from server into Local Storage and preview it for the users'. In this case, when the users' visit the website back, the frontend just need to serve the Local Storage value and validate it from server later, which will not affect the User Experiences,