feat(i18n): localize inventory categories UI

tests/e2e/language-switcher.spec.ts

@@ -68,6 +68,36 @@ test.describe("language switcher", () => {
     await expectLocaleCookie(page, "es")
   })
 
+  test("renders inventory categories copy in the active locale", async ({
+    baseURL,
+    page,
+  }) => {
+    await signInAsAdmin(page, baseURL)
+    await setLocaleCookie(page, "es", baseURL)
+
+    await page.goto("/inventory/categories")
+
+    await expect(page.locator("html")).toHaveAttribute("lang", "es")
+    await expect(
+      page.getByRole("heading", { name: "Categorías" }),
+    ).toBeVisible()
+    await expect(
+      page.getByRole("link", { name: /Agregar categoría/ }),
+    ).toBeVisible()
+    await expect(page.getByText("No se encontraron categorías.")).toBeVisible()
+
+    await page.goto("/inventory/categories/new")
+
+    await expect(
+      page.getByRole("heading", { name: "Nueva categoría" }),
+    ).toBeVisible()
+    await expect(page.getByLabel("Nombre")).toBeVisible()
+    await expect(page.getByPlaceholder("Nombre de la categoría")).toBeVisible()
+    await expect(
+      page.getByRole("button", { name: "Crear categoría" }),
+    ).toBeVisible()
+  })
+
   test("switches the authenticated dashboard language from the navbar", async ({
     baseURL,
     page,