fix(ui): Update `Sidebar` component: restrict spectroscopy modality options to RDWP and FTIR

frontend/src/components/Sidebar.tsx

@@ -153,19 +153,8 @@ const Sidebar: React.FC<SidebarProps> = ({
               className="form-select"
               title="Choose the spectroscopy modality for analysis"
             >
-              {models
-                .filter((m) => m.available)
-                .map((model) => (
-                  <option
-                    key={model.name}
-                    value={model.name}
-                    title={model.description || "No description available"}
-                  >
-                    {model.display_name || model.name}
-                  </option>
-                ))}
-              <option value="raman">Raman Spectroscopy</option>
-              <option value="ftir">FTIR Spectroscopy</option>
+              <option value="raman">RDWP Spectroscopy</option>
+              <option value="ftir">FTIR</option>
             </select>
           </div>
         </div>