feat: add Translation Management with approval workflow

- New Translations + TranslationTexts NocoDB tables (auto-created on restart)
- Full CRUD: list, create, update, delete, bulk-delete translations
- Translation texts per language (add/edit/delete inline)
- Review flow: submit-review generates public token link
- Public review page: shows source + all translations, approve/reject/revision
- Email notifications to approvers (registered users)
- Sidebar nav under Marketing category
- Bilingual i18n (80+ keys in en.json and ar.json)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

client/src/App.jsx

@@ -35,6 +35,8 @@ const PublicPostReview = lazy(() => import('./pages/PublicPostReview'))
 const Issues = lazy(() => import('./pages/Issues'))
 const PublicIssueSubmit = lazy(() => import('./pages/PublicIssueSubmit'))
 const PublicIssueTracker = lazy(() => import('./pages/PublicIssueTracker'))
+const Translations = lazy(() => import('./pages/Translations'))
+const PublicTranslationReview = lazy(() => import('./pages/PublicTranslationReview'))
 const ForgotPassword = lazy(() => import('./pages/ForgotPassword'))
 const ResetPassword = lazy(() => import('./pages/ResetPassword'))
 
@@ -295,6 +297,7 @@ function AppContent() {
             <Route path="/review-post/:token" element={<PublicPostReview />} />
             <Route path="/submit-issue" element={<PublicIssueSubmit />} />
             <Route path="/track/:token" element={<PublicIssueTracker />} />
+            <Route path="/review-translation/:token" element={<PublicTranslationReview />} />
             <Route path="/" element={user ? <Layout /> : <Navigate to="/login" replace />}>
               <Route index element={<Dashboard />} />
               {hasModule('marketing') && <>
@@ -305,6 +308,7 @@ function AppContent() {
                 <Route path="campaigns" element={<Campaigns />} />
                 <Route path="campaigns/:id" element={<CampaignDetail />} />
                 <Route path="brands" element={<Brands />} />
+                <Route path="translations" element={<Translations />} />
               </>}
               {hasModule('finance') && (user?.role === 'superadmin' || user?.role === 'manager') && <>
                 <Route path="finance" element={<Finance />} />