Initialise `AppState` with placeholder value

Removes the need to re-type the same command after every change. This also increases the size of the input box to accommodate.

Created by  finchie  on November 25, 2023
GHO2RSOCHVFVS5UQSOGZT53FGZIVR4YKWGRSCEY3TZC5H3WCNMJQC
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