feat: improve captain overview loading and reuse stats for summary [CW-7610] (#15105)

app/javascript/dashboard/components-next/captain/pageComponents/overview/MetricCard.vue

@@ -9,6 +9,7 @@ const props = defineProps({
   // null = neutral, true = good direction, false = bad direction
   trendGood: { type: Boolean, default: null },
   clickable: { type: Boolean, default: false },
+  loading: { type: Boolean, default: false },
 });
 
 const emit = defineEmits(['click']);
@@ -45,7 +46,11 @@ const onActivate = () => {
         class="transition-opacity opacity-0 cursor-help i-lucide-info size-3.5 text-n-slate-10 group-hover:opacity-100"
       />
     </div>
-    <div class="flex items-end justify-between gap-2">
+    <div v-if="loading" class="flex items-end justify-between gap-2">
+      <div class="w-20 rounded h-9 bg-n-slate-3 animate-pulse" />
+      <div class="w-10 h-5 rounded bg-n-slate-3 animate-pulse" />
+    </div>
+    <div v-else class="flex items-end justify-between gap-2">
       <span
         class="text-3xl font-semibold tracking-tight tabular-nums text-n-slate-12"
       >

app/javascript/dashboard/components-next/captain/pageComponents/overview/WelcomeCard.vue

@@ -9,6 +9,10 @@ const props = defineProps({
     type: String,
     default: '30',
   },
+  stats: {
+    type: Object,
+    default: null,
+  },
 });
 
 const route = useRoute();
@@ -20,22 +24,41 @@ const assistantId = computed(() => route.params.assistantId);
 const welcomeMarkdown = ref('');
 const isLoading = ref(false);
 
+// Increments on every fetch so a slow response for a superseded
+// range/stats/assistant can't overwrite the latest request's state.
+let fetchToken = 0;
+
 const fetchSummary = async () => {
+  fetchToken += 1;
+  const token = fetchToken;
+
+  if (!props.stats) {
+    welcomeMarkdown.value = '';
+    isLoading.value = false;
+    return;
+  }
+
   isLoading.value = true;
+  let message = '';
   try {
     const { data } = await CaptainAssistant.getSummary({
       assistantId: assistantId.value,
       range: props.range,
+      stats: props.stats,
     });
-    welcomeMarkdown.value = data.message ?? '';
+    message = data.message ?? '';
   } catch {
-    welcomeMarkdown.value = '';
-  } finally {
-    isLoading.value = false;
+    message = '';
   }
+
+  if (token !== fetchToken) return;
+  welcomeMarkdown.value = message;
+  isLoading.value = false;
 };
 
-watch([() => props.range, assistantId], fetchSummary, { immediate: true });
+watch([() => props.range, () => props.stats, assistantId], fetchSummary, {
+  immediate: true,
+});
 
 // Render through the shared markdown formatter (html disabled, so it is safe)
 // used everywhere else for Captain output, instead of a bespoke parser. It