Animate maintenance mode indicator

ui/panel.html

@@ -1174,7 +1174,7 @@
                   title="1 严格串行；2 均衡加速；3 快速后台（最终一致）"
                 >
                   <div class="bme-cap-header">
-                    <span class="bme-cap-icon"><i class="fa-solid fa-gauge-high"></i></span>
+                    <span class="bme-cap-icon bme-mode-gauge" aria-hidden="true"></span>
                     <div class="bme-mode-segmented" id="bme-setting-maintenance-execution-mode">
                       <button type="button" data-mode="strict" aria-label="1 严格串行">1</button>
                       <button type="button" data-mode="balanced" aria-label="2 均衡加速">2</button>

ui/panel.js

@@ -4496,6 +4496,7 @@ function _refreshMaintenanceExecutionModeUi(settings = _getSettings?.() || {}) {
   const card = document.getElementById("bme-maintenance-mode-card");
   const level = getMaintenanceExecutionModeLevel(meta.mode);
   if (desc) desc.textContent = meta.desc;
+  if (segmented) segmented.dataset.mode = meta.mode;
   if (card) {
     card.dataset.mode = meta.mode;
     card.title = `${meta.title}；1 严格串行 / 2 均衡加速 / 3 快速后台（最终一致）`;