feat(i18n): add locale dictionaries and pilot surfaces

tests/e2e/app.smoke.spec.ts

@@ -1,6 +1,17 @@
 import { expect, type Page, test } from "@playwright/test"
 
-async function signInAsAdmin(page: Page) {
+async function setEnglishLocaleCookie(page: Page, baseURL?: string) {
+  await page.context().addCookies([
+    {
+      name: "stock-manager-locale",
+      value: "en",
+      url: baseURL ?? "http://127.0.0.1:3100",
+    },
+  ])
+}
+
+async function signInAsAdmin(page: Page, baseURL?: string) {
+  await setEnglishLocaleCookie(page, baseURL)
   await page.goto("/login")
   await page.getByLabel("Username").fill("admin")
   await page.getByLabel("Password").fill("admin-password")
@@ -9,7 +20,12 @@ async function signInAsAdmin(page: Page) {
 }
 
 test.describe("main app smoke", () => {
-  test("redirects unauthenticated users to login", async ({ page }) => {
+  test("redirects unauthenticated users to login", async ({
+    baseURL,
+    page,
+  }) => {
+    await setEnglishLocaleCookie(page, baseURL)
+
     await page.goto("/admin/users")
 
     await expect(page).toHaveURL(/\/login/)
@@ -17,8 +33,11 @@ test.describe("main app smoke", () => {
     await expect(page.getByRole("button", { name: "Sign In" })).toBeVisible()
   })
 
-  test("signs in as seeded admin and opens the dashboard", async ({ page }) => {
-    await signInAsAdmin(page)
+  test("signs in as seeded admin and opens the dashboard", async ({
+    baseURL,
+    page,
+  }) => {
+    await signInAsAdmin(page, baseURL)
 
     await expect(page.getByRole("heading", { name: "Dashboard" })).toBeVisible()
     await expect(page.getByText("E2E Admin")).toBeVisible()
@@ -27,8 +46,11 @@ test.describe("main app smoke", () => {
     ).toBeVisible()
   })
 
-  test("admin can open users and inventory pages", async ({ page }) => {
-    await signInAsAdmin(page)
+  test("admin can open users and inventory pages", async ({
+    baseURL,
+    page,
+  }) => {
+    await signInAsAdmin(page, baseURL)
 
     await page.getByRole("link", { name: "Users" }).click()
     await expect(page).toHaveURL(/\/admin\/users/)