A bunch of fixes

[brusherru]

Includes:

• added handy input for amount with units and conversion
• fixes #21
• fixes #20
• fixes #19
• closes #12 — I've added "Wipe out" button on the unlock screen
• closes #10

[github-actions[bot]]

You can preview the changes at : https://f73a9875.smapp-lite-prod.pages.dev