Integrate per-save identity and interaction UI

tests/network_chat_protocol_validation.gd

@@ -10,6 +10,7 @@ func _initialize() -> void:
 func _validate_protocol() -> void:
 	_validate_type_and_empty_handling()
 	_validate_message_cleanup()
+	_validate_roleplay_commands()
 	_validate_protocol_limits()
 	print("Network chat protocol validation: PASS")
 	quit()
@@ -34,6 +35,28 @@ func _validate_message_cleanup() -> void:
 	)
 
 
+func _validate_roleplay_commands() -> void:
+	assert(NetworkChatProtocol.is_roleplay_body("/me waves"))
+	assert(NetworkChatProtocol.is_roleplay_body("/ME   waves"))
+	assert(NetworkChatProtocol.is_roleplay_body("/me"))
+	assert(not NetworkChatProtocol.is_roleplay_body("/meow"))
+	assert(NetworkChatProtocol.roleplay_action("/me   waves") == "waves")
+	assert(NetworkChatProtocol.roleplay_action(
+		"/me [color=red]waves[/color]"
+	) == "[color=red]waves[/color]")
+	assert(NetworkChatProtocol.valid_user_body("/me waves"))
+	assert(not NetworkChatProtocol.valid_user_body("/me"))
+	assert(not NetworkChatProtocol.valid_user_body("/me   "))
+	assert(NetworkChatProtocol.valid_user_body("/meow"))
+	var signed_fields: Array = NetworkChatProtocol.signature_fields({
+		"session_id": "session",
+		"request_id": "request",
+		"sender_fingerprint": "fingerprint",
+		"body": "/me waves",
+	})
+	assert(signed_fields.back() == "/me waves")
+
+
 func _validate_protocol_limits() -> void:
 	var maximum_body: String = "a".repeat(
 		NetworkChatProtocol.MAX_VISIBLE_CHARACTERS