ui: tighten portal layout and status polling

frontend/src/App.vue

@@ -14,7 +14,7 @@
 </template>
 
 <script setup>
-import { onMounted, ref } from "vue";
+import { onMounted, onUnmounted, ref } from "vue";
 import TopBar from "./components/TopBar.vue";
 import { fallbackHardware, fallbackServices, fallbackNetwork, fallbackMetrics } from "./data/sample.js";
 
@@ -27,12 +27,13 @@ const metricsData = ref(fallbackMetrics());
 const statusLoading = ref(true);
 const statusFetching = ref(false);
 const statusError = ref("");
+let pollTimerId = null;
 
 async function refreshLabStatus() {
   if (statusFetching.value) return;
   statusFetching.value = true;
   const controller = new AbortController();
-  const timeoutId = window.setTimeout(() => controller.abort(), 6000);
+  const timeoutId = window.setTimeout(() => controller.abort(), 10000);
   try {
     const resp = await fetch("/api/lab/status", {
       headers: { Accept: "application/json" },
@@ -52,13 +53,23 @@ async function refreshLabStatus() {
     window.clearTimeout(timeoutId);
     statusLoading.value = false;
     statusFetching.value = false;
+    scheduleNextPoll();
   }
 }
 
 onMounted(() => {
   refreshLabStatus();
-  window.setInterval(refreshLabStatus, 30000);
 });
+
+onUnmounted(() => {
+  if (pollTimerId) window.clearTimeout(pollTimerId);
+});
+
+function scheduleNextPoll() {
+  if (pollTimerId) window.clearTimeout(pollTimerId);
+  const delayMs = labStatus.value ? 30000 : 8000;
+  pollTimerId = window.setTimeout(refreshLabStatus, delayMs);
+}
 </script>
 
 <style scoped>

frontend/src/components/MermaidCard.vue

@@ -39,6 +39,8 @@ const svgContent = ref("");
 const renderKey = ref(props.cardId || `mermaid-${Math.random().toString(36).slice(2)}`);
 const isOpen = ref(false);
 let initialized = false;
+let scheduledHandle = null;
+let scheduledKind = "";
 
 const renderDiagram = async () => {
   if (!props.diagram) return;
@@ -65,10 +67,38 @@ const renderDiagram = async () => {
   }
 };
 
-onMounted(renderDiagram);
+function cancelScheduledRender() {
+  if (!scheduledHandle) return;
+  if (scheduledKind === "idle" && window.cancelIdleCallback) {
+    window.cancelIdleCallback(scheduledHandle);
+  } else {
+    window.clearTimeout(scheduledHandle);
+  }
+  scheduledHandle = null;
+  scheduledKind = "";
+}
+
+function scheduleRenderDiagram() {
+  cancelScheduledRender();
+  if (!props.diagram) return;
+  const runner = () => {
+    scheduledHandle = null;
+    scheduledKind = "";
+    renderDiagram();
+  };
+  if (window.requestIdleCallback) {
+    scheduledKind = "idle";
+    scheduledHandle = window.requestIdleCallback(runner, { timeout: 1500 });
+  } else {
+    scheduledKind = "timeout";
+    scheduledHandle = window.setTimeout(runner, 0);
+  }
+}
+
+onMounted(scheduleRenderDiagram);
 watch(
   () => props.diagram,
-  () => renderDiagram()
+  () => scheduleRenderDiagram()
 );
 
 const onKeyDown = (event) => {
@@ -76,6 +106,7 @@ const onKeyDown = (event) => {
 };
 
 const open = () => {
+  if (!svgContent.value) scheduleRenderDiagram();
   isOpen.value = true;
 };
 
@@ -94,6 +125,7 @@ watch(isOpen, (value) => {
 });
 
 onUnmounted(() => {
+  cancelScheduledRender();
   document.body.style.overflow = "";
   window.removeEventListener("keydown", onKeyDown);
 });

frontend/src/views/AccountView.vue

@@ -587,16 +587,18 @@ h1 {
   grid-template-columns: 1fr 1fr;
   gap: 12px;
   margin-top: 12px;
+  align-items: stretch;
 }
 
 .account-stack {
   display: flex;
   flex-direction: column;
   gap: 12px;
+  height: 100%;
 }
 
 .account-stack .module {
-  flex: 1;
+  flex: 1 1 0;
   min-height: 0;
 }
 

frontend/src/views/AppsView.vue

@@ -181,6 +181,10 @@ const sections = [
   .section-grid {
     grid-template-columns: 1fr 1fr;
   }
+
+  .tiles {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
 }
 
 .hero {
@@ -201,7 +205,8 @@ const sections = [
   justify-content: space-between;
   gap: 18px;
   margin-bottom: 14px;
-  min-height: 92px;
+  height: 92px;
+  overflow: hidden;
 }
 
 .group + .group {
@@ -226,7 +231,7 @@ const sections = [
 
 .tiles {
   display: grid;
-  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
+  grid-template-columns: 1fr;
   gap: 12px;
 }
 
@@ -238,7 +243,7 @@ const sections = [
   border: 1px solid rgba(255, 255, 255, 0.1);
   background: rgba(255, 255, 255, 0.02);
   transition: border-color 160ms ease, transform 160ms ease;
-  min-height: 112px;
+  min-height: 120px;
 }
 
 .tile:hover {