Terminal: Ctrl+C copies a selection (else ^C), Ctrl+V pastes, over http too; drop Log out everywhere

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

internal/auth/auth.go

@@ -146,15 +146,6 @@ func (s *Sessions) Valid(tok string) bool {
 	return ok
 }
 
-// DeleteAll ends every session on every device and says how many there were.
-func (s *Sessions) DeleteAll() (n int) {
-	_ = s.st.Update(func(state *store.State) {
-		n = len(state.Sessions)
-		state.Sessions = map[string]time.Time{}
-	})
-	return n
-}
-
 func (s *Sessions) Delete(tok string) {
 	_ = s.st.Update(func(state *store.State) { delete(state.Sessions, tok) })
 }