feat(i18n): localize shell and common UI

tests/e2e/language-switcher.spec.ts

@@ -86,8 +86,47 @@ test.describe("language switcher", () => {
     await expect(
       page.getByRole("heading", { name: "Panel de control" }),
     ).toBeVisible()
+    await expect(page.getByRole("link", { name: /Inicio/ })).toBeVisible()
+    await page.getByRole("button", { name: /Inventario/ }).click()
+    await expect(page.getByRole("link", { name: /Artículos/ })).toBeVisible()
+    await expect(
+      page.getByRole("link", { name: /Destinatarios/ }),
+    ).toBeVisible()
+    await expect(page.getByRole("link", { name: /Usuarios/ })).toBeVisible()
+
+    await page.getByRole("button", { name: "Añadir" }).click()
+    await expect(page.getByRole("menuitem", { name: /Importar/ })).toBeVisible()
+    await expect(
+      page.getByRole("menuitem", { name: /Categoría/ }),
+    ).toBeVisible()
+    await expect(
+      page.getByRole("menuitem", { name: /Asignación/ }),
+    ).toBeVisible()
+    await page.keyboard.press("Escape")
+
     await expect(page.getByText("E2E Admin")).toBeVisible()
-    await expect(page.getByText("admin@example.test")).toBeVisible()
+    await page.getByText("E2E Admin").click()
+    await expect(page.getByText("Mi cuenta")).toBeVisible()
+    await expect(
+      page.getByRole("button", { name: "Cerrar sesión" }),
+    ).toBeVisible()
+    await page.keyboard.press("Escape")
+
+    await page.goto("/admin/users")
+    await expect(page.getByPlaceholder("Buscar...")).toBeVisible()
+    await expect(page.getByRole("searchbox", { name: "Buscar" })).toBeVisible()
+
+    await page.goto("/forbidden")
+    await expect(
+      page.getByRole("heading", { name: "Acceso denegado" }),
+    ).toBeVisible()
+    await expect(
+      page.getByText("No tienes permisos para acceder a esta sección."),
+    ).toBeVisible()
+    await expect(
+      page.getByRole("link", { name: "Volver al inicio" }),
+    ).toBeVisible()
+
     await expectLocaleCookie(page, "es")
   })
 })

tests/unit/i18n/dictionaries.test.ts

@@ -44,6 +44,113 @@ describe("i18n dictionaries", () => {
     })
   })
 
+  it("provides localized shell and common copy for English and Spanish", () => {
+    expect(getDictionary("en").layout).toEqual({
+      sidebar: {
+        home: "Home",
+        inventory: "Inventory",
+        items: "Items",
+        categories: "Categories",
+        assets: "Assets",
+        recipients: "Recipients",
+        movements: "Movements",
+        assignments: "Assignments",
+        users: "Users",
+      },
+      navbar: {
+        accountLabel: "My Account",
+      },
+      addMenu: {
+        add: "Add",
+        import: "Import",
+        category: "Category",
+        item: "Item",
+        asset: "Asset",
+        recipient: "Recipient",
+        assignment: "Assignment",
+      },
+      resetDatabase: {
+        idle: "Reset Database",
+        loading: "Resetting...",
+        successToast: "Database reset successfully",
+        errorToast: "Error resetting database",
+      },
+      logout: {
+        label: "Sign Out",
+      },
+    })
+
+    expect(getDictionary("es").layout).toEqual({
+      sidebar: {
+        home: "Inicio",
+        inventory: "Inventario",
+        items: "Artículos",
+        categories: "Categorías",
+        assets: "Activos",
+        recipients: "Destinatarios",
+        movements: "Movimientos",
+        assignments: "Asignaciones",
+        users: "Usuarios",
+      },
+      navbar: {
+        accountLabel: "Mi cuenta",
+      },
+      addMenu: {
+        add: "Añadir",
+        import: "Importar",
+        category: "Categoría",
+        item: "Artículo",
+        asset: "Activo",
+        recipient: "Destinatario",
+        assignment: "Asignación",
+      },
+      resetDatabase: {
+        idle: "Reiniciar base de datos",
+        loading: "Reiniciando...",
+        successToast: "Base de datos reiniciada correctamente",
+        errorToast: "Error al reiniciar la base de datos",
+      },
+      logout: {
+        label: "Cerrar sesión",
+      },
+    })
+
+    expect(getDictionary("en").common.search).toEqual({
+      placeholder: "Search...",
+      label: "Search",
+      clearLabel: "Clear search",
+    })
+    expect(getDictionary("es").common.search).toEqual({
+      placeholder: "Buscar...",
+      label: "Buscar",
+      clearLabel: "Limpiar búsqueda",
+    })
+
+    expect(getDictionary("en").common.pagination).toEqual({
+      summaryPrefix: "Showing page",
+      summarySeparator: "of",
+      previous: "Previous",
+      next: "Next",
+    })
+    expect(getDictionary("es").common.pagination).toEqual({
+      summaryPrefix: "Mostrando página",
+      summarySeparator: "de",
+      previous: "Anterior",
+      next: "Siguiente",
+    })
+
+    expect(getDictionary("en").common.forbidden).toEqual({
+      title: "Access denied",
+      description: "You do not have permission to access this section.",
+      homeLink: "Back to home",
+    })
+    expect(getDictionary("es").common.forbidden).toEqual({
+      title: "Acceso denegado",
+      description: "No tienes permisos para acceder a esta sección.",
+      homeLink: "Volver al inicio",
+    })
+  })
+
   it("keeps dashboard home dictionary keys aligned across locales", () => {
     expect(getDictionary("en").dashboardHome).toEqual({
       heading: "Dashboard",