fix: add missing teamsbot settings route in App.tsx

The /settings route for teamsbot feature instances was missing from App.tsx,
causing a blank page when navigating to the settings view.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/App.tsx

@@ -163,6 +163,7 @@ function App() {
                                 
                                 {/* Teams Bot Feature Views */}
                                 <Route path="sessions" element={<FeatureViewPage view="sessions" />} />
+                                <Route path="settings" element={<FeatureViewPage view="settings" />} />
                                 
                                 {/* Catch-all für unbekannte Sub-Pfade */}
                                 <Route path="*" element={<FeatureViewPage view="not-found" />} />