Feature/saajan persona (#3)

* feat: add template based email content (html + plaintext fallback)

* feat: init saajan component

* feat: add aesthetic noise background and implement Saajan component in register and login

* feat: add post seal modal for vault

* refactor: add proper props interfaces

* refactor: expose props on ui components

* feat: add ssajan in lots of flows

* fix: remove render test with no value and add aria helper for btn identification

* refactor: update email notification to account for proper arguments

* refactor:  refactor E2E auth helper and mail parsing logic

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Co-authored-by: ramvignesh-b <ramvignesh-b@github.com>

frontend/src/components/reader/PostActionOverlay.tsx

@@ -1,7 +1,11 @@
 import { useNavigate } from "react-router-dom";
 import { ROUTES } from "../../config/routes";
 
-export function PostActionOverlay({ revealState }) {
+interface PostActionOverlayProps {
+  revealState: "sealed" | "revealed" | "burning" | "burned";
+}
+
+export function PostActionOverlay({ revealState }: PostActionOverlayProps) {
   const navigate = useNavigate();
   return (
     <div