chore: refactor the global state and improve signer (#56)

* refactor

* update

* .

* rustfmt

* .

* .

* .

* .

* .

* add document

* .

* add logout

* handle error

* chore: update gpui

* adjust timeout

crates/chats/Cargo.toml

@@ -5,7 +5,6 @@ edition.workspace = true
 publish.workspace = true
 
 [dependencies]
-account = { path = "../account" }
 common = { path = "../common" }
 global = { path = "../global" }