Fix SVG markup in select options, add missing name placeholders

Remove SVG icon function calls from <option> textContent — native
select elements render markup as literal text. Capture template options
now show "name (engine_type)", source options show just the name.

Add i18n placeholders to automation and scene editor name inputs.
Rename HAOS Scenes device from "{server_name} Scenes" to "Scenes".

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

server/src/wled_controller/static/js/features/kc-targets.js

@@ -428,7 +428,7 @@ export async function showKCEditor(targetId = null, cloneData = null) {
             const opt = document.createElement('option');
             opt.value = s.id;
             opt.dataset.name = s.name;
-            opt.textContent = `${getPictureSourceIcon(s.stream_type)} ${s.name}`;
+            opt.textContent = s.name;
             sourceSelect.appendChild(opt);
         });