Add full shell, replaceable Omics adapter and bilingual interaction

Implement approved specification #32 and tickets #33-#37. Keep host authentication server-verified and pin session interaction language. Compile scoped base selectors for browser compatibility and retain full gutters during CSS pruning.

frontend/src/shell/DatabaseManagementPage.test.tsx

@@ -1,4 +1,5 @@
 import { act, fireEvent, render, screen, waitFor, within } from "@testing-library/react";
+import { setLocale } from "../i18n";
 import userEvent from "@testing-library/user-event";
 import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
 import { http, HttpResponse } from "msw";
@@ -115,6 +116,22 @@ function renderPage({
   return { ...view, client };
 }
 
+test("updates database row actions and the open editor when switching EN and IT", async () => {
+  renderPage({ presentation: "fleet" });
+  await userEvent.click(await screen.findByRole("button", { name: "Edit Policlinico San Donato" }));
+  const name = await screen.findByLabelText("Database name");
+  const savedName = (name as HTMLInputElement).value;
+  try {
+    act(() => setLocale("it"));
+    expect(screen.getByLabelText("Nome database")).toHaveValue(savedName);
+    expect(screen.getByRole("button", { name: "Salva modifiche" })).toBeVisible();
+    expect(screen.getByRole("button", { name: "Verifica connessione" })).toBeVisible();
+    act(() => setLocale("en"));
+    expect(screen.getByLabelText("Database name")).toHaveValue(savedName);
+    expect(screen.getByRole("button", { name: "Save changes" })).toBeVisible();
+  } finally { act(() => setLocale("en")); }
+});
+
 test("fleet entry opens the database list without workspace preparation or an automatic editor", async () => {
   renderPage({ presentation: "fleet" });
   expect(await screen.findByRole("button", { name: "View tables for Policlinico San Donato" })).toBeVisible();