chore: remove Slides page and Salla console output

- Remove Slides route, import, and mobile nav link from App.tsx
- Remove Salla route mounting and console output from server

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/App.tsx

@@ -3,7 +3,6 @@ import { BrowserRouter as Router, Routes, Route, Link, useLocation } from 'react
 
 const Dashboard = lazy(() => import('./components/Dashboard'));
 const Comparison = lazy(() => import('./components/Comparison'));
-const Slides = lazy(() => import('./components/Slides'));
 import LoadingSkeleton from './components/shared/LoadingSkeleton';
 import { fetchData, getCacheStatus, refreshData } from './services/dataService';
 import { useLanguage } from './contexts/LanguageContext';
@@ -240,7 +239,6 @@ function App() {
             <Routes>
               <Route path="/" element={<Dashboard data={data} showDataLabels={showDataLabels} setShowDataLabels={setShowDataLabels} includeVAT={includeVAT} setIncludeVAT={setIncludeVAT} />} />
               <Route path="/comparison" element={<Comparison data={data} showDataLabels={showDataLabels} setShowDataLabels={setShowDataLabels} includeVAT={includeVAT} setIncludeVAT={setIncludeVAT} />} />
-              <Route path="/slides" element={<Slides data={data} />} />
             </Routes>
           </Suspense>
         </main>
@@ -264,14 +262,6 @@ function App() {
             </svg>
             <span>{t('nav.compare')}</span>
           </NavLink>
-          <NavLink to="/slides" className="mobile-nav-item">
-            <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true">
-              <rect x="2" y="3" width="20" height="14" rx="2"/>
-              <line x1="8" y1="21" x2="16" y2="21"/>
-              <line x1="12" y1="17" x2="12" y2="21"/>
-            </svg>
-            <span>{t('nav.slides')}</span>
-          </NavLink>
           <button
             className="mobile-nav-item"
             onClick={switchLanguage}