fix(chatui): command tooltip auto-closes with panel & enhances dark mode visibility

dashboard/src/components/chat/CommandSuggestion.vue

@@ -47,7 +47,7 @@
 </template>
 
 <script setup lang="ts">
-import { computed, reactive } from "vue";
+import { computed, reactive, watch } from "vue";
 import { useModuleI18n } from "@/i18n/composables";
 
 export interface SuggestionCommand {
@@ -113,6 +113,15 @@ const panelStyle = computed(() => {
   };
 });
 
+watch(
+  () => props.visible,
+  (val) => {
+    if (!val) {
+      tooltip.visible = false;
+    }
+  },
+);
+
 function handleSelect(index: number) {
   const cmd = props.commands[index];
   if (cmd) {
@@ -224,7 +233,7 @@ function handleMouseLeave() {
 }
 
 .is-dark .command-description {
-  color: #999;
+  color: #e0e0e0;
 }
 
 .command-suggestion-hint {