Terms of Service page (public + acknowledge) (#39) (#43)

## Summary

Closes #39.

- Shared `TermsOfServiceDocument` used by public + acknowledge flows
- `/terms_of_service/` reachable without auth; `/legal/terms-of-service` alias
- Expanded clauses including **Analytics and Cookies** (always-on page views vs consent-gated events)
- Acknowledge still posts `/user/acknowledge_tos/` when signed in
- Links from Sign In, Sign Up, and Footer

## Test plan

- [ ] Visit `/terms_of_service/` logged out — document renders, no Acknowledge
- [ ] Visit `/legal/terms-of-service` — same public content
- [ ] Sign in as user needing ToS — Acknowledge posts and navigates home
- [ ] Confirm Sign In / Sign Up / Footer / consent banner link to ToS
- [ ] `npm run test:ci -- --testPathPattern='TermsOfService|Footer'`Reviewed-on: #43

llm-fe/src/App.tsx

@@ -10,6 +10,7 @@ import PasswordReset from './llm-fe/pages/PasswordReset/PasswordReset';
 import NotFound from './llm-fe/pages/NotFound/NotFound';
 import { AuthContext } from './llm-fe/contexts/AuthContext';
 import TermsOfService from './llm-fe/pages/TermsOfService/TermsOfService';
+import PublicTermsOfServicePage from './llm-fe/pages/TermsOfService/PublicTermsOfServicePage';
 import SetPassword from './llm-fe/components/SetPassword/SetPassword';
 import AsyncDashboard2 from './llm-fe/pages/AsyncDashboard2/AsyncDashboard2';
 import FeedbackPage2 from './llm-fe/pages/FeedbackPage2/FeedbackPage2';
@@ -61,14 +62,14 @@ class App extends Component {
                 <Route path={"/password_reset/"} Component={PasswordReset} />
                 <Route path={"/password_reset_confirmation/"} Component={PasswordResetConfirmation} />
                 <Route path={'/set_password/'} Component={SetPassword} />
-
-
+                {/* Public legal pages (also used for post-login ToS acknowledge) */}
+                <Route path={"/terms_of_service/"} Component={TermsOfService} />
+                <Route path={"/legal/terms-of-service"} Component={PublicTermsOfServicePage} />
 
                 <Route element={<ProtectedRoutes />}>
                   <Route path={"/"} index={true} Component={AsyncDashboard2} />
                   <Route path={"/account/"} Component={Account2} />
                   <Route path={"/document_storage"} Component={DocumentStoragePage} />
-                  <Route path={"/terms_of_service/"} Component={TermsOfService} />
                   <Route path={"/feedback/"} Component={FeedbackPage2} />
                   <Route path={"/analytics/"} Component={AnalyticsPage} />