I like the look of the UI a lot. Makes me want to try running a mint.

One small bit a feed back:

On the lightning channel graph with receiving capacity | sending capacity. What if you make the grey vertical line that separates the two side change thickness based on how much of the channel is being held in reserve for channel closing. You could show the number of sats above the line.

I know I do a double take when I see my channel capacity change even though was no activity on the channel. Because mempool fees have gone up and LND is holding more in reserve.