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/locales/zh.json

@@ -551,6 +551,7 @@
   "automations.delete.confirm": "删除自动化 \"{name}\"？",
   "automations.name": "名称：",
   "automations.name.hint": "此自动化的描述性名称",
+  "automations.name.placeholder": "我的自动化",
   "automations.enabled": "启用：",
   "automations.enabled.hint": "禁用的自动化即使满足条件也不会激活",
   "automations.condition_logic": "条件逻辑：",
@@ -626,6 +627,7 @@
   "scenes.edit": "编辑场景",
   "scenes.name": "名称：",
   "scenes.name.hint": "此场景预设的描述性名称",
+  "scenes.name.placeholder": "我的场景",
   "scenes.description": "描述：",
   "scenes.description.hint": "此场景功能的可选描述",
   "scenes.color": "卡片颜色：",