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/pages/Editor.test.tsx

@@ -83,11 +83,9 @@ describe("Editor Page", () => {
       expect(screen.queryByText(/Opening your draft/i)).not.toBeInTheDocument();
     });
 
-    // Initial state: DRAFT (not read-only)
     const canvas = screen.getByTestId("canvas");
     expect(canvas.getAttribute("data-readonly")).toBe("false");
 
-    // Click Seal in the main toolbar (it's in the div with id="writer-toolbar")
     const toolbar = container.querySelector("#writer-toolbar");
     const sealBtn = toolbar?.querySelector(".btn-primary");
     if (!sealBtn) throw new Error("Seal button not found");