Code should be written in kotlin,gridle,jetpack compose, using scaffold, viewmodel and viewmodel factory. can you provide me a code for mobile application in kotlin which uses jetpack compose, where a custom room data base is created this Dao should manage $($users$,$ conversations and Messages $)$ each Dao should leverage the convenienve methods to delete, insert and update also a $($get all query and get by id query$)$

there should be three entities $($ conversation, Message and user$)$

main part is three screens is need to make

$(1.$a screen to show the list of conversation,$2.$a screen to show a conversation and a user create page $)$ also write me a unit test coverage room.