Show transparency in calendar view

Also separate utils.ts file which was getting too big, and add a POST test

lib/auth.ts

@@ -3,7 +3,7 @@ import { decodeBase64 } from 'std/encoding/base64.ts';
 import { Cookie, getCookies, setCookie } from 'std/http/cookie.ts';
 import 'std/dotenv/load.ts';
 
-import { baseUrl, generateHash, isRunningLocally } from './utils.ts';
+import { baseUrl, generateHash, isRunningLocally } from './utils/misc.ts';
 import { User, UserSession } from './types.ts';
 import { createUserSession, deleteUserSession, getUserByEmail, validateUserAndSession } from './data/user.ts';