move alot to constants, fix html

src/routes/user/logout.ts

@@ -1,9 +1,12 @@
 import { echo } from "@atums/echo";
+import {
+	errorMessages,
+	httpStatus,
+	successMessages,
+} from "#environment/constants";
 import { cookieService, sessionManager } from "#lib/auth";
 
-import type { BaseResponse, ExtendedRequest, RouteDef } from "#types/server";
-
-interface LogoutResponse extends BaseResponse {}
+import type { ExtendedRequest, LogoutResponse, RouteDef } from "#types/server";
 
 const routeDef: RouteDef = {
 	method: ["POST", "DELETE"],
@@ -17,24 +20,24 @@ async function handler(request: ExtendedRequest): Promise<Response> {
 
 		if (!session) {
 			const response: LogoutResponse = {
-				code: 401,
+				code: httpStatus.UNAUTHORIZED,
 				success: false,
-				error: "Not authenticated",
+				error: errorMessages.NOT_AUTHENTICATED,
 			};
-			return Response.json(response, { status: 401 });
+			return Response.json(response, { status: httpStatus.UNAUTHORIZED });
 		}
 
 		await sessionManager.invalidateSession(request);
 		const clearCookie = cookieService.clearCookie();
 
 		const response: LogoutResponse = {
-			code: 200,
+			code: httpStatus.OK,
 			success: true,
-			message: "Logged out successfully",
+			message: successMessages.LOGOUT_SUCCESSFUL,
 		};
 
 		return Response.json(response, {
-			status: 200,
+			status: httpStatus.OK,
 			headers: {
 				"Set-Cookie": clearCookie,
 			},
@@ -46,11 +49,13 @@ async function handler(request: ExtendedRequest): Promise<Response> {
 		});
 
 		const response: LogoutResponse = {
-			code: 500,
+			code: httpStatus.INTERNAL_SERVER_ERROR,
 			success: false,
-			error: "Internal server error",
+			error: errorMessages.INTERNAL_SERVER_ERROR,
 		};
-		return Response.json(response, { status: 500 });
+		return Response.json(response, {
+			status: httpStatus.INTERNAL_SERVER_ERROR,
+		});
 	}
 }