update where shell starts and add override -home setting

internals/session.go

@@ -67,7 +67,7 @@ func getOrCreate(id string) *Session {
 	} else {
 		cmd = exec.Command("/bin/bash", "-i")
 	}
-	cmd.Dir = initialCwd
+	cmd.Dir = shellHome
 
 	// Build environment: inherit parent env but force TERM so that bash readline
 	// correctly decodes modifier+cursor sequences (Shift+Arrow etc.).