feat(lci-theme): wire AE_c_LCI_new into theme pickers for demo

- app.css: import ae-c-lci-new.css alongside existing ae-c-lci.css
- e_app_theme.svelte, e_app_sys_bar.svelte, e_app_url_builder.svelte:
  add 'LCI (New ✦)' option pointing to AE_c_LCI_new selector

Both themes coexist — switch between 'LCI' and 'LCI (New ✦)' in the
theme picker to compare old vs brand-guide-accurate colors and fonts.

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

src/app.css

@@ -36,6 +36,7 @@ html.light {
 /* @import '@skeletonlabs/skeleton/themes/ae_c_lci'; */
 @import './ae-osit-default.css';
 @import './ae-c-lci.css';
+@import './ae-c-lci-new.css';
 @import './ae-c-idaa-light.css';
 @import './ae-firefly.css';
 @import './ae-firefly-steelblue.css';