feat(web): expand object class icon mapping

Map more TTS classes to icons, including multi-set icons for models and
bags, and add a wrap-break-word class fix in the default viewer.

apps/web/src/components/objectIcons.test.ts

@@ -5,8 +5,8 @@ describe('iconsForObject', () => {
   it('maps known classes to icons', () => {
     expect(iconsForObject('Card')).toEqual(['mdi:cards-outline']);
     expect(iconsForObject('Custom_Model_Bag')).toEqual([
-      'mdi:bag-personal-outline',
-      'mdi:cube-outline',
+      'file-icons:3d-model',
+      'material-symbols:folder',
     ]);
   });