refactor/optimize e2e test (#3)

how fast i'll go 🏄‍♂️

---------

Co-authored-by: me <ramvignesh-b@github.com>
Reviewed-on: #3

frontend/e2e/letter.spec.ts

@@ -1,6 +1,7 @@
 import { expect, test } from "@playwright/test";
 import pino from "pino";
 import { AuthHelper } from "./utils/auth";
+import { revealEnvelope } from "./utils/envelope";
 
 const logger = pino({
   transport: {
@@ -22,20 +23,19 @@ test.describe("Letter Drafting (Real Backend)", () => {
     await AuthHelper.registerAndLogin(page, email, name, password);
 
     logger.info(">> [Draft] Navigating to Editor via UI...");
-    await page.getByRole("button", { name: /write something/i }).click();
+    await page.getByTestId("write-letter-btn").click();
 
     logger.info(`>> [Draft] Current URL after click: ${page.url()}`);
 
-    // Wait for the recipient input to be present in the DOM
+    // Editor page
-    const recipientInput = page.locator("#recipient");
+    await expect(page.getByTestId("recipient-input")).toBeVisible();
-    await recipientInput.waitFor({ state: "visible", timeout: 20000 });
+    const recipientInput = page.getByTestId("recipient-input");
 
     const recipientName = "Dear Friend";
     await recipientInput.fill(recipientName);
 
     // Initial load: verify textarea value (populated by Fabric when focused)
     const canvasInput = page.locator("textarea");
-    await canvasInput.waitFor({ state: "attached" });
     await canvasInput.focus();
     await expect(canvasInput).toHaveValue(/Take a deep breath/i);
 
@@ -46,10 +46,10 @@ test.describe("Letter Drafting (Real Backend)", () => {
     await page.keyboard.press("Enter");
     await page.keyboard.type("It should persist.");
     logger.info(">> [Draft] Clicking Draft...");
-    await page.getByRole("button", { name: /draft/i }).click();
+    await page.getByTestId("draft-btn").click();
 
     // Verify Success Modal/Alert
-    await expect(page.getByText(/your letter is saved/i)).toBeVisible();
+    await expect(page.getByTestId("save-success-toast")).toBeVisible();
 
     // Verify URL updated with a UUID
     await expect(page).toHaveURL(/\/quill\/[0-9a-f-]{36}/);
@@ -61,24 +61,16 @@ test.describe("Letter Drafting (Real Backend)", () => {
     await page.goto(savedUrl);
 
     // Wait for initial load overlay to appear and then definitely disappear
-    await page
+    await expect(page.getByTestId("opening-draft-overlay")).toBeHidden();
-      .getByText(/opening your draft/i)
-      .waitFor({ state: "visible", timeout: 2000 })
-      .catch(() => {});
-    await expect(page.getByText(/opening your draft/i)).toBeHidden({
-      timeout: 10000,
-    });
 
     // Check recipient
-    await expect(page.locator("#recipient")).toHaveValue(recipientName);
+    await expect(page.getByTestId("recipient-input")).toHaveValue(recipientName);
 
     // Check canvas content
     // We wait for the content to appear in the textarea.
     // toHaveValue will poll until it matches or timeouts.
     await canvasInput.focus();
-    await expect(canvasInput).toHaveValue(/This is a secret draft/i, {
+    await expect(canvasInput).toHaveValue(/This is a secret draft/i);
-      timeout: 10000,
-    });
     await expect(canvasInput).toHaveValue(/It should persist/i);
   });
 
@@ -92,10 +84,9 @@ test.describe("Letter Drafting (Real Backend)", () => {
     await AuthHelper.registerAndLogin(page, email, name, password);
 
     logger.info(">> [Seal] Navigating to Editor via UI...");
-    await page.locator("#write-letter-btn").click();
+    await page.getByTestId("write-letter-btn").click();
 
-    const recipientInput = page.locator("#recipient");
+    const recipientInput = page.getByTestId("recipient-input");
-    await recipientInput.waitFor({ state: "visible", timeout: 10000 });
     await recipientInput.fill("A Secret Guest");
 
     const canvasInput = page.locator("textarea");
@@ -104,55 +95,41 @@ test.describe("Letter Drafting (Real Backend)", () => {
 
     // Click Seal (open menu, then confirm)
     logger.info(">> [Seal] Clicking Seal...");
-    await page
+    await page.getByTestId("seal-trigger-btn").click();
-      .getByRole("button", { name: /seal/i })
+    await page.getByTestId("seal-confirm-btn").click();
-      .filter({ visible: true })
-      .click();
-    await page
-      .getByRole("button", { name: /seal/i })
-      .filter({ visible: true })
-      .click();
 
     // Should show sealed confirmation modal
     logger.info(">> [Seal] Verifying sealed modal...");
-    await expect(page.getByText(/your letter is sealed/i)).toBeVisible({
+    await expect(page.getByTestId("post-seal-modal")).toBeVisible();
-      timeout: 10000,
-    });
 
     // Navigate to Reader via "View letter"
-    await page.getByRole("button", { name: /view letter/i }).click();
+    await page.getByTestId("view-letter-btn").click();
 
     // Should be on Reader URL
-    await expect(page).toHaveURL(/\/read\/[a-f0-9-]{36}$/, { timeout: 15000 });
+    await expect(page).toHaveURL(/\/read\/[a-f0-9-]{36}$/);
 
     // Open the envelope to reveal the letter
-    await expect(page.getByText(/breaking the seal/i)).toBeHidden({
+    await expect(page.getByTestId("decryption-overlay")).toBeHidden();
-      timeout: 10000,
+    // Flip the envelope to show the seal and reveal the letter
-    });
+    await revealEnvelope(page);
-    // Flip the envelope to show the seal
+    await expect(page.getByTestId("envelope-letter")).toBeHidden();
-    await page.locator("#env-front").click();
-    await page.waitForTimeout(2500); // Wait for flip transition
-
-    await page.getByAltText("Seal").click();
-    await page.waitForTimeout(1500);
-    await page.locator("#letter").click({ position: { x: 30, y: 15 } });
-    await expect(page.locator("#letter")).toBeHidden({ timeout: 20000 });
 
     // Share on demand
     logger.info(">> [Seal] Clicking Share button in Reader...");
-    await page.locator("#share-letter-btn").click();
+    await page.getByTestId("share-letter-btn").click();
 
     // Verify share modal with a valid link
-    await expect(page.getByText(/send this letter/i)).toBeVisible();
+    await expect(page.getByTestId("share-letter-modal")).toBeVisible();
     const linkInput = page.locator("#share-link-input");
     const linkValue = await linkInput.inputValue();
     expect(linkValue).toContain("/read/");
     expect(linkValue).toContain("#");
     logger.info(`>> [Seal] Sharing link: ${linkValue}`);
 
-    await expect(page.getByRole("button", { name: /copy/i })).toBeVisible();
+    await expect(page.getByTestId("copy-link-btn")).toBeVisible();
-    await page.getByRole("button", { name: /close/i }).click();
+    // Assuming Close button in ShareModal might need a testid too, but for now let's use text if unique or add testid
-    await expect(page.getByText(/send this letter/i)).toBeHidden();
+    await page.getByTestId("modal-close-btn").click();
+    await expect(page.getByTestId("share-letter-modal")).toBeHidden();
   });
 
   test("should allow author to access sealed letter from drawer without sharing key", async ({
@@ -167,10 +144,9 @@ test.describe("Letter Drafting (Real Backend)", () => {
     await AuthHelper.registerAndLogin(page, email, name, password);
 
     logger.info(">> [Drawer] Creating and sealing a letter...");
-    await page.getByRole("button", { name: /write something/i }).click();
+    await page.getByTestId("write-letter-btn").click();
 
-    const recipientInput = page.locator("#recipient");
+    const recipientInput = page.getByTestId("recipient-input");
-    await recipientInput.waitFor({ state: "visible" });
     await recipientInput.fill(recipientName);
 
     const canvasInput = page.locator("textarea");
@@ -178,59 +154,34 @@ test.describe("Letter Drafting (Real Backend)", () => {
     await canvasInput.fill(letterContent);
 
     // Click Seal (open menu, then confirm)
-    await page
+    await page.getByTestId("seal-trigger-btn").click();
-      .getByRole("button", { name: /seal/i })
+    await page.getByTestId("seal-confirm-btn").click();
-      .filter({ visible: true })
-      .click();
-    await page
-      .getByRole("button", { name: /seal/i })
-      .filter({ visible: true })
-      .click();
 
     // Sealed modal should appear — click "Keep it" to go to Drawer
-    await expect(page.getByText(/your letter is sealed/i)).toBeVisible({
+    await expect(page.getByTestId("post-seal-modal")).toBeVisible();
-      timeout: 10000,
+    await page.getByTestId("keep-it-btn").click();
-    });
-    await page.getByRole("button", { name: /keep it to myself/i }).click();
 
     // Open "Kept" section - search for the section with id='kept' and click its toggle button
     logger.info(">> [Drawer] Opening Kept section...");
-    const keptSection = page.locator("#kept");
+    await page.getByTestId("drawer-section-kept").click();
-    await keptSection.getByRole("button", { name: /kept/i }).click();
 
     // Find the sealed letter in the drawer by recipient name and click it
     logger.info(">> [Drawer] Clicking sealed letter in drawer...");
     const sealedItem = page
-      .getByRole("button", { name: new RegExp(recipientName, "i") })
+      .getByTestId(/^letter-item-/)
+      .filter({ hasText: recipientName })
       .first();
     await sealedItem.click();
 
     // Verify it opens the Reader without a hash
     logger.info(">> [Drawer] Verifying Reader page...");
     // Give it a bit more time for decryption
-    await expect(page).toHaveURL(/\/read\/[a-f0-9-]{36}$/, { timeout: 15000 });
+    await expect(page).toHaveURL(/\/read\/[a-f0-9-]{36}$/);
     // Reveal and check decrypted content in Reader
-    await expect(page.getByText(/breaking the seal/i)).toBeHidden({
+    await expect(page.getByTestId("decryption-overlay")).toBeHidden();
-      timeout: 10000,
+    // Flip the envelope and reveal the letter
-    });
+    await revealEnvelope(page);
-    // Check recipient on the front of the envelope
+    await expect(page.getByTestId("envelope-letter")).toBeHidden();
-    await expect(page.getByText(new RegExp(recipientName, "i"))).toBeVisible();
-
-    // Flip the envelope to the back
-    await page.getByText(new RegExp(recipientName, "i")).click();
-    // Wait for flip transition (2s)
-    await page.waitForTimeout(2500);
-
-    // Reveal the letter: click seal then click letter
-    await page.getByAltText("Seal").click();
-    // Wait for flap transition
-    await page.waitForTimeout(1500);
-
-    // Click the letter to pull it out
-    await page.locator("#letter").click({ position: { x: 30, y: 15 } });
-
-    // Wait for reveal transition
-    await expect(page.locator("#letter")).toBeHidden({ timeout: 20000 });
 
     // Also check if we are redirected to the Reader if we manually go to the Editor URL
     const readerUrl = page.url();

frontend/e2e/utils/auth.ts

@@ -1,6 +1,7 @@
 import { expect, type Page } from "@playwright/test";
 import pino from "pino";
 import { MailpitHelper } from "./mailpit";
+import { handleWelcomeLetter } from "./envelope";
 
 const logger = pino({
   transport: {
@@ -23,11 +24,11 @@ async function registerAndLogin(
   // Register the User
   logger.info(`[Auth] Registering user: ${email}`);
   await page.goto("/onboard");
-  await page.getByLabel(/pen name/i).fill(fullName);
+  await page.getByTestId("pen-name-input").fill(fullName);
-  await page.getByLabel("Email", { exact: true }).fill(email);
+  await page.getByTestId("email-input").fill(email);
-  await page.getByLabel("Password", { exact: true }).fill(password);
+  await page.getByTestId("password-input").fill(password);
-  await page.getByLabel(/confirm password/i).fill(password);
+  await page.getByTestId("confirm-password-input").fill(password);
-  await page.getByRole("button", { name: /^register$/i }).click();
+  await page.getByTestId("register-submit-btn").click();
 
   await expect(page).toHaveURL(/\/verify-email/);
 
@@ -37,51 +38,23 @@ async function registerAndLogin(
 
   await page.goto(activationLink);
 
-  await expect(page.getByText(/account activated/i)).toBeVisible();
+  await expect(page.getByTestId("activation-success-header")).toBeVisible();
-  await page.getByRole("button", { name: /start writing/i }).click();
+  await page.getByTestId("start-writing-btn").click();
 
   // Dismiss the Welcom Modal and Perform Login
   logger.info(`[Auth] Logging in...`);
   await expect(page).toHaveURL(/\/login/);
 
-  const welcomeButton = page.getByRole("button", { name: /I'll remember/i });
+  await page.getByTestId("welcome-dismiss-btn").click();
-  await welcomeButton.waitFor({ state: "visible", timeout: 10000 });
+  await expect(page.getByTestId("welcome-dismiss-btn")).toBeHidden();
-  await welcomeButton.click();
-  await expect(welcomeButton).toBeHidden();
 
-  await page.getByLabel("Email", { exact: true }).fill(email);
+  await page.getByTestId("email-input").fill(email);
-  await page.getByLabel("Password", { exact: true }).fill(password);
+  await page.getByTestId("password-input").fill(password);
-  await page.getByRole("button", { name: /sign in/i }).click();
+  await page.getByTestId("login-submit-btn").click();
 
   await expect(page).toHaveURL(/\/drawer/);
   await handleWelcomeLetter(page);
   logger.info(`[Auth] Successfully authenticated ${email}`);
 }
 
-/**
+export const AuthHelper = { registerAndLogin };
- * Handles and dismisses the first welocme letter
- */
-async function handleWelcomeLetter(page: Page) {
-  logger.info("[Auth] Handling Welcome Letter...");
-  // Click envelope to flip
-  const envelope = page.locator("#env-front");
-  await envelope.waitFor({ state: "visible", timeout: 10000 });
-  await envelope.click();
-
-  // Click seal to open flap
-  const seal = page.getByAltText("Seal");
-  await seal.waitFor({ state: "visible" });
-  await seal.click();
-
-  // Click letter to reveal
-   await page.locator("#letter").click({ position: { x: 30, y: 15 } });
-
-  // Click "I'll see you" button
-  const completeButton = page.getByRole("button", { name: /I'll see you/i });
-  await completeButton.waitFor({ state: "visible", timeout: 10000 });
-  await completeButton.click();
-
-  await expect(completeButton).toBeHidden();
-}
-
-export const AuthHelper = { registerAndLogin, handleWelcomeLetter };

frontend/e2e/utils/envelope.ts

@@ -0,0 +1,38 @@
+import { type Page, expect } from "@playwright/test";
+import pino from "pino";
+
+const logger = pino({
+  transport: {
+    target: "pino-pretty",
+    options: {
+      colorize: true,
+    },
+  },
+});
+
+/**
+ * Reveal a letter from an envelope.
+ */
+export async function revealEnvelope(page: Page) {
+  logger.info("[Envelope] Revealing envelope...");
+  // Click envelope to flip
+  await page.getByTestId("envelope-front").click();
+
+  // Click seal to open flap
+  await page.getByTestId("wax-seal").click();
+
+  // Click letter to reveal
+  await page.getByTestId("envelope-letter").click({ position: { x: 30, y: 15 } });
+}
+
+/**
+ * Handles and dismisses the first welcome letter
+ */
+export async function handleWelcomeLetter(page: Page) {
+  logger.info("[Envelope] Handling Welcome Letter...");
+  await revealEnvelope(page);
+
+  // Click "I'll see you" button
+  await page.getByTestId("dismiss-welcome-letter-btn").click();
+  await expect(page.getByTestId("dismiss-welcome-letter-btn")).toBeHidden();
+}

frontend/playwright.config.ts

@@ -60,7 +60,8 @@ export default defineConfig({
 
   /* Run your local dev server before starting the tests */
   webServer: {
-    command: "npm run dev -- --mode e2e",
+    // NOTE: using npm here for docker compat mainly
+    command: "npm run build -- --mode e2e && npm run preview -- --mode e2e",
     url: getBaseUrl(
       process.env.SSL_ENABLED === "true",
       process.env.FRONTEND_DOMAIN,

frontend/src/components/drawer/DrawerSection.tsx

@@ -35,6 +35,7 @@ export function DrawerSection({
       <button
         type="button"
         onClick={onClick}
+        data-testid={`drawer-section-${id}`}
         className={`w-full p-[24px_28px] cursor-pointer flex items-center gap-5 transition-all duration-2000 ease-in-out outline-none focus-visible:ring-2 focus-visible:ring-primary/50 border border-base-content/10 text-left bg-linear-to-r from-transparent to-base-100/40`}
       >
         <div className="flex-1">

frontend/src/components/drawer/LetterItem.tsx

@@ -33,6 +33,7 @@ export function LetterItem({
     <button
       type="button"
       onClick={handleNavigate}
+      data-testid={`letter-item-${id}`}
       className={`${isLocked ? "pointer-events-none" : ""} p-4 border-base-content/3 flex items-start gap-4 hover:bg-base-300 transition-all delay-75 duration-100 group text-left cursor-pointer w-9/12 mx-auto hover:scale-120 hover:h-24 hover:-translate-y-3 hover:pb-4 hover:border-x-5 hover:border-t-5 border-t-2 hover:-mb-2`}
     >
       <div className="text-[0.85rem] italic text-base-content/40 flex-1 truncate group-hover:text-base-content/60 transition-none animate-[opacity_200ms_linear_forwards]">

frontend/src/components/drawer/WelcomeLetterOverlay.tsx

@@ -1,11 +1,11 @@
-import { AnimatePresence, motion } from "framer-motion";
+import { AnimatePresence, motion } from "motion/react";
 import { useEffect, useRef, useState } from "react";
 import { getWelcomeLetterContent } from "../../config/welcomeLetter";
 import { formatDate } from "../../utils/dateFormat";
 import { type CanvasTools, ComposeCanvas } from "../editor/ComposeCanvas";
 import { EnvelopeReveal } from "../reader/EnvelopeReveal";
 
-interface WelcomeLetterOverlayProps {
+export interface WelcomeLetterOverlayProps {
     onComplete: () => void;
     userName: string;
 }
@@ -64,6 +64,7 @@ export function WelcomeLetterOverlay({
                     <div className="flex justify-center mt-12">
                         <button
                             type="button"
+                            data-testid="dismiss-welcome-letter-btn"
                             onClick={onComplete}
                             className="btn btn-accent opacity-80 px-12 shadow-lg"
                         >

frontend/src/components/editor/PostSealModal.tsx

@@ -15,7 +15,7 @@ export function PostSealModal({
   type = "KEPT",
 }: PostSealModalProps) {
   return (
-    <Modal isOpen={!!sealedTargetId}>
+    <Modal isOpen={!!sealedTargetId} data-testid="post-seal-modal">
       <LockIcon size={32} weight="duotone" className="text-primary mt-3" />
       <h3 className="font-serif text-2xl">Your letter is sealed</h3>
       <p className="text-base-content/60">
@@ -53,6 +53,7 @@ export function PostSealModal({
           <>
             <button
               type="button"
+              data-testid="keep-it-btn"
               className="btn btn-ghost btn-sm"
               onClick={() => navigate(ROUTES.DRAWER)}
             >
@@ -60,6 +61,7 @@ export function PostSealModal({
             </button>
             <button
               type="button"
+              data-testid="view-letter-btn"
               className="btn btn-primary btn-sm"
               onClick={() => navigate(PATHS.read(sealedTargetId!))}
             >

frontend/src/components/editor/ToolBar.tsx

@@ -140,6 +140,7 @@ export function ToolBar({
       <div className="flex items-center gap-2">
         <button
           type="button"
+          data-testid="draft-btn"
           className="btn btn-ghost btn-sm text-xxs group tracking-widester uppercase font-bold text-base-content/60 hover:text-base-content"
           title="Store in your private drawer"
           onClick={() => onSave("DRAFT")}
@@ -155,6 +156,7 @@ export function ToolBar({
         {/*Seal */}
         <button
           type="button"
+          data-testid="seal-trigger-btn"
           className={`btn btn-primary btn-sm rounded-full px-6 group ${sealBtnClicked ? "invisible" : "visible"}`}
           onClick={() => setSealBtnClicked(true)}
         >
@@ -176,6 +178,7 @@ export function ToolBar({
       >
         <button
           type="button"
+          data-testid="seal-confirm-btn"
           className="btn btn-accent btn-sm rounded-full px-6 group"
           onClick={() => onSave("SEALED")}
         >

frontend/src/components/login/WelcomeModal.tsx

@@ -65,6 +65,7 @@ export default function WelcomeModal({
           <div className="modal-action w-full">
             <button
               type="button"
+              data-testid="welcome-dismiss-btn"
               onClick={() => setShowWelcome(false)}
               className="btn btn-primary w-full shadow-lg"
             >

frontend/src/components/reader/EnvelopeReveal.tsx

@@ -80,6 +80,7 @@ export function EnvelopeReveal({
             />
           </div>
           <img
+            data-testid="wax-seal"
             className={
               "translate-y-24 delay-2000 absolute z-6 peer-has-checked:pointer-events-none peer-has-checked:opacity-0 peer-has-checked:delay-0 transition-opacity duration-1000 cursor-pointer"
             }
@@ -91,6 +92,7 @@ export function EnvelopeReveal({
           <button
             type="button"
             id="letter"
+            data-testid="envelope-letter"
             className={`absolute mx-auto transition-all peer-has-checked:delay-800 peer-has-checked:duration-1000 duration-1000 mt-2 h-55 w-105 bg-paper peer-has-checked:-mt-12 hover:-mt-24 cursor-pointer ${revealLetter ? "duration-1000 peer-has-checked:duration-3000 w-screen max-w-4xl h-screen z-101 -translate-y-90" : "peer-has-checked:z-1"}`}
             onClick={handleClick}
           ></button>
@@ -112,6 +114,7 @@ export function EnvelopeReveal({
 
         <button
           id="env-front"
+          data-testid="envelope-front"
           type="button"
           disabled={!isInteractive}
           className={`text-left p-10 absolute inset-0 backface-hidden w-110 bg-base-200 z-99 rounded-md -translate-x-2 ${isFlipped ? "pointer-events-none" : ""}`}

frontend/src/components/reader/ShareModal.tsx

@@ -14,7 +14,11 @@ export function ShareModal({ shareLink, setShareLink }: ShareModalProps) {
   };
   return (
     <>
-      <Modal isOpen={!!shareLink} onClose={() => setShareLink(null)}>
+      <Modal
+        isOpen={!!shareLink}
+        onClose={() => setShareLink(null)}
+        data-testid="share-letter-modal"
+      >
         <div className="flex flex-col items-center justify-center text-center gap-6 py-4">
           <div className="space-y-2">
             <PaperPlaneTiltIcon
@@ -47,6 +51,7 @@ export function ShareModal({ shareLink, setShareLink }: ShareModalProps) {
             <button
               type="button"
               onClick={copyToClipboard}
+              data-testid="copy-link-btn"
               className="btn btn-primary font-sans btn-sm rounded-tl-xl rounded-bl-xl rounded-tr-full rounded-br-full"
             >
               Copy

frontend/src/components/ui/FormField.tsx

@@ -7,6 +7,7 @@ interface FormFieldProps {
   registration: UseFormRegisterReturn;
   error?: string;
   handleFocus?: () => void;
+  "data-testid"?: string;
 }
 
 export default function FormField({
@@ -16,6 +17,7 @@ export default function FormField({
   registration,
   error,
   handleFocus,
+  "data-testid": testId,
 }: FormFieldProps) {
   return (
     <div className="form-control">
@@ -28,6 +30,7 @@ export default function FormField({
       <input
         {...registration}
         id={registration.name}
+        data-testid={testId}
         type={type}
         placeholder={placeholder}
         className={`input input-bordered focus:input-primary ${

frontend/src/components/ui/Modal.tsx

@@ -5,17 +5,27 @@ interface ModalProps {
   isOpen: boolean;
   onClose?: () => void;
   children: ReactNode;
+  "data-testid"?: string;
 }
 
-export function Modal({ isOpen, onClose, children }: ModalProps) {
+export function Modal({
+  isOpen,
+  onClose,
+  children,
+  "data-testid": testId,
+}: ModalProps) {
   if (!isOpen) return null;
 
   return (
-    <div className="modal modal-open modal-middle backdrop-blur-md before:absolute before:top-0 before:left-0 before:w-full before:h-full before:content-[''] before:opacity-[0.03] before:z-10 before:pointer-events-none before:bg-[url('assets/noise.gif')]">
+    <div
+      data-testid={testId}
+      className="modal modal-open modal-middle backdrop-blur-md before:absolute before:top-0 before:left-0 before:w-full before:h-full before:content-[''] before:opacity-[0.03] before:z-10 before:pointer-events-none before:bg-[url('assets/noise.gif')]"
+    >
       <div className="modal-box relative bg-base-100/60 flex flex-col items-center text-center gap-6">
         {onClose && (
           <button
             type="button"
+            data-testid="modal-close-btn"
             className="btn btn-sm btn-circle btn-ghost absolute right-2 top-2 z-20"
             onClick={onClose}
             aria-label="Close"

frontend/src/pages/Activate.tsx

@@ -52,17 +52,18 @@ export default function Activate() {
                             className="text-success"
                         />
                     </div>
-          <h2 className="font-display text-xl text-success">
+                    <h2 data-testid="activation-success-header" className="font-display text-xl text-success">
-            Account Activated!
+                        You're in.
                     </h2>
                     <p className="opacity-70 leading-relaxed">
                         Welcome to <Logo scale={1} />
                         <br />
-            Your identity is now verified and ready for timeless letters.
+                        Just one more step and you can start writing timeless letters.
                     </p>
                     <div className="divider opacity-10 my-0"></div>
                     <button
                         type="button"
+                        data-testid="start-writing-btn"
                         className="btn btn-primary w-full shadow-lg"
                         onClick={() =>
                             navigate(ROUTES.LOGIN, {
@@ -71,7 +72,7 @@ export default function Activate() {
                             })
                         }
                     >
-            Start Writing
+                        I'm ready
                     </button>
                 </div>
             )}

frontend/src/pages/Drawer.test.tsx

@@ -2,13 +2,14 @@ import { fireEvent, render, screen } from "@testing-library/react";
 import { MemoryRouter } from "react-router-dom";
 import { beforeEach, describe, expect, it, vi } from "vitest";
 import { mockUser } from "../../test/fixtures/user.fixture";
+import type { WelcomeLetterOverlayProps } from "../components/drawer/WelcomeLetterOverlay";
 import { useLetters } from "../hooks/useLetters";
 import { useAuthStore } from "../store/useAuthStore";
 import Drawer from "./Drawer";
 
 vi.mock("../hooks/useLetters");
 vi.mock("../components/drawer/WelcomeLetterOverlay", () => ({
-  WelcomeLetterOverlay: ({ onComplete }: any) => (
+    WelcomeLetterOverlay: ({ onComplete }: WelcomeLetterOverlayProps) => (
         <div data-testid="welcome-letter-overlay">
             <button
                 type="button"

frontend/src/pages/Drawer.tsx

@@ -159,6 +159,7 @@ export default function Drawer() {
       <button
         type="button"
         id="write-letter-btn"
+        data-testid="write-letter-btn"
         className="group mt-15 z-10 bg-transparent border border-dashed border-base-content/10 px-8 py-4 text-base-content/40 italic cursor-pointer transition-all hover:border-primary/40 hover:text-base-content/60 hover:bg-primary/5 hover:-translate-y-0.5 flex items-center gap-2 focus-visible:ring-2 focus-visible:ring-primary/50 duration-500"
         onClick={() => navigate(PATHS.write(""))}
       >

frontend/src/pages/Editor.tsx

@@ -376,7 +376,10 @@ export default function Editor() {
                 weight="bold"
                 className="animate-spin text-primary"
               />
-              <p className="text-xxs uppercase tracking-widester font-bold text-base-content/40">
+              <p
+                data-testid="opening-draft-overlay"
+                className="text-xxs uppercase tracking-widester font-bold text-base-content/40"
+              >
                 Opening your draft...
               </p>
             </div>
@@ -406,6 +409,7 @@ export default function Editor() {
             {saveOverlay === "SAVED" && (
               <div
                 role="alert"
+                data-testid="save-success-toast"
                 className={`alert alert-success shadow-lg transition-all ease-in-out duration-2000 ${
                   showSaveOverlay
                     ? "opacity-100 scale-100 translate-y-0"
@@ -459,6 +463,7 @@ export default function Editor() {
               </label>
               <input
                 id="recipient"
+                data-testid="recipient-input"
                 type="text"
                 placeholder={toPlaceholderList[placeholderIndex]}
                 value={recipient}

frontend/src/pages/Login.tsx

@@ -97,6 +97,7 @@ export default function Login() {
             label="Email"
             type="email"
             placeholder="f.kafka@wrongtrain.com"
+            data-testid="email-input"
             registration={register("email")}
             error={errors.email?.message}
             handleFocus={() => setSaajanMessage("I remember you.")}
@@ -106,6 +107,7 @@ export default function Login() {
             label="Password"
             type="password"
             placeholder="••••••••"
+            data-testid="password-input"
             registration={register("password")}
             error={errors.password?.message}
             handleFocus={() =>
@@ -119,6 +121,7 @@ export default function Login() {
               name="login"
               disabled={isLoading}
               aria-label="Sign In"
+              data-testid="login-submit-btn"
               className="btn btn-primary w-full shadow-lg"
             >
               {isLoading ? (

frontend/src/pages/Reader.tsx

@@ -217,7 +217,10 @@ export default function Reader() {
           <Logo />
           <div className="flex flex-col items-center gap-2">
             <span className="loading loading-ring loading-md text-primary/40"></span>
-            <p className="text-xs uppercase tracking-widest text-base-content/20 animate-pulse">
+            <p
+              data-testid="decryption-overlay"
+              className="text-xs uppercase tracking-widest text-base-content/20 animate-pulse"
+            >
               Breaking the seal...
             </p>
           </div>
@@ -306,6 +309,7 @@ export default function Reader() {
         <div className="flex justify-center gap-2 mt-8 z-10 relative">
           <button
             id="share-letter-btn"
+            data-testid="share-letter-btn"
             type="button"
             className="btn btn-ghost btn-sm text-base-content/30 hover:text-base-content hover:bg-base-content/10 gap-1.5"
             onClick={handleShare}
@@ -317,6 +321,7 @@ export default function Reader() {
           </button>
           <button
             id="burn-letter-btn"
+            data-testid="burn-letter-btn"
             type="button"
             className="btn btn-ghost btn-sm text-error/40 hover:text-error hover:bg-error/10 gap-1.5"
             onClick={() => setShowBurnModal(true)}

frontend/src/pages/Register.tsx

@@ -89,6 +89,7 @@ export default function Register() {
                     <FormField
                         label="Pen Name"
                         placeholder="Word Smith"
+                        data-testid="pen-name-input"
                         registration={register("full_name")}
                         error={errors.full_name?.message}
                         handleFocus={() =>
@@ -100,6 +101,7 @@ export default function Register() {
                         label="Email"
                         type="email"
                         placeholder="f.kafka@wrongtrain.com"
+                        data-testid="email-input"
                         registration={register("email")}
                         error={errors.email?.message}
                         handleFocus={() =>
@@ -113,6 +115,7 @@ export default function Register() {
                         label="Password"
                         type="password"
                         placeholder="••••••••"
+                        data-testid="password-input"
                         registration={register("password")}
                         error={errors.password?.message}
                         handleFocus={() =>
@@ -126,6 +129,7 @@ export default function Register() {
                         label="Confirm Password"
                         type="password"
                         placeholder="••••••••"
+                        data-testid="confirm-password-input"
                         registration={register("confirm_password")}
                         error={errors.confirm_password?.message}
                         handleFocus={() =>
@@ -150,6 +154,7 @@ export default function Register() {
                             type="submit"
                             disabled={isLoading}
                             aria-label="Register"
+                            data-testid="register-submit-btn"
                             className="btn btn-primary w-full shadow-lg"
                         >
                             {isLoading ? (

frontend/vite.config.ts

@@ -46,5 +46,10 @@ export default defineConfig(({ mode }) => {
       host: env.FRONTEND_DOMAIN,
       https: isSslEnabled ? sslCerts : undefined,
     },
+    preview: {
+      port: Number(env.FRONTEND_PORT),
+      host: env.FRONTEND_DOMAIN,
+      https: isSslEnabled ? sslCerts : undefined,
+    },
   };
 });