diff --git a/public/app.js b/public/app.js
index 7de4bf0..a7a6232 100644
--- a/public/app.js
+++ b/public/app.js
@@ -8,6 +8,8 @@ let state = {
   selectedRepoId: null,
   selectedBranch: null,
   expandedGpuHosts: new Set(),
+  expandedTasks: new Set(),
+  expandedTerminals: new Set(),
   settings: { gpuHosts: [] },
   errors: {}
 };
@@ -72,7 +74,12 @@ function shortSession(sessionId) {
 
 function isGpuIdle(gpu) {
   const memoryPercent = percent(gpu.memoryUsedMiB, gpu.memoryTotalMiB);
-  return memoryPercent < 5 && gpu.gpuUtilizationPercent < 5;
+  return memoryPercent < 5 || gpu.gpuUtilizationPercent < 5;
+}
+
+function isGpuAbnormal(gpu) {
+  const memoryPercent = percent(gpu.memoryUsedMiB, gpu.memoryTotalMiB);
+  return memoryPercent >= 5 && gpu.gpuUtilizationPercent < 5;
 }
 
 function toast(message, tone = '') {
@@ -169,8 +176,8 @@ function renderGpus() {
     const expanded = state.expandedGpuHosts.has(host.host);
     const thumbRows = host.gpus.map((gpu) => {
       const memoryPercent = percent(gpu.memoryUsedMiB, gpu.memoryTotalMiB);
-      const busy = !isGpuIdle(gpu);
-      return `<span class="gpu-thumb ${busy ? 'busy' : 'idle'}" title="#${gpu.index} GPU ${gpu.gpuUtilizationPercent}% · MEM ${memoryPercent}%"></span>`;
+      const thumbClass = isGpuAbnormal(gpu) ? 'abnormal' : isGpuIdle(gpu) ? 'idle' : 'busy';
+      return `<span class="gpu-thumb ${thumbClass}" title="#${gpu.index} GPU ${gpu.gpuUtilizationPercent}% · MEM ${memoryPercent}%"></span>`;
     }).join('');
     const gpuRows = host.gpus.map((gpu) => {
       const memoryPercent = percent(gpu.memoryUsedMiB, gpu.memoryTotalMiB);
@@ -299,12 +306,13 @@ function renderResumeTasks() {
   $('resumeTaskButton').disabled = options.length === 0;
 }
 
-function renderTerminal(label, content, tone = '', expanded = true) {
+function renderTerminal(label, content, tone = '', expanded = true, terminalKey = '') {
   if (!content) return '';
   const lineCount = content.split('\n').length;
   const body = `<pre class="terminal-body" tabindex="0">${escapeHtml(content)}</pre>`;
   if (!expanded) {
-    return `<details class="terminal ${tone}">
+    const openAttr = terminalKey && state.expandedTerminals.has(terminalKey) ? ' open' : '';
+    return `<details class="terminal ${tone}" data-terminal-key="${escapeHtml(terminalKey)}"${openAttr}>
       <summary class="terminal-head">
         <span>${label}</span>
         <span>${lineCount} lines</span>
@@ -343,8 +351,8 @@ function taskFullBody(task, { expandedTerminals }) {
     </div>
     <div class="task-meta workspace-path">${escapeHtml(task.workspace)}</div>
     <div class="task-prompt">${escapeHtml(task.prompt)}</div>
-    ${renderTerminal('stderr', task.stderr, 'stderr', expandedTerminals)}
-    ${renderTerminal('stdout', task.stdout, '', expandedTerminals)}
+    ${renderTerminal('stderr', task.stderr, 'stderr', expandedTerminals, `${task.id}:stderr`)}
+    ${renderTerminal('stdout', task.stdout, '', expandedTerminals, `${task.id}:stdout`)}
   `;
 }
 
@@ -360,7 +368,8 @@ function renderHistoryTaskCard(task) {
   const resumeButton = canResumeTask(task)
     ? `<button class="secondary-button small" type="button" data-resume-task="${escapeHtml(task.id)}">选择继续</button>`
     : '';
-  return `<details class="task-card history-task status-${escapeHtml(task.status)}">
+  const openAttr = state.expandedTasks.has(task.id) ? ' open' : '';
+  return `<details class="task-card history-task status-${escapeHtml(task.status)}" data-task-id="${escapeHtml(task.id)}"${openAttr}>
     <summary class="task-summary">
       <span class="chip status-chip">${escapeHtml(statusLabel(task.status))}</span>
       <span class="task-summary-main">
@@ -577,6 +586,24 @@ $('taskBoard').addEventListener('click', (event) => {
   selectResumeTask(button.dataset.resumeTask);
 });
 
+$('taskBoard').addEventListener('toggle', (event) => {
+  const target = event.target;
+  if (!(target instanceof HTMLDetailsElement)) return;
+  if (target.matches('details.history-task')) {
+    const id = target.dataset.taskId;
+    if (!id) return;
+    if (target.open) state.expandedTasks.add(id);
+    else state.expandedTasks.delete(id);
+    return;
+  }
+  if (target.matches('details.terminal')) {
+    const key = target.dataset.terminalKey;
+    if (!key) return;
+    if (target.open) state.expandedTerminals.add(key);
+    else state.expandedTerminals.delete(key);
+  }
+}, true);
+
 async function submitTask(resume) {
   const repo = state.repos.find((item) => item.id === state.selectedRepoId);
   const prompt = $('promptInput').value.trim();
@@ -625,4 +652,4 @@ $('taskForm').addEventListener('submit', async (event) => {
 $('resumeTaskButton').addEventListener('click', () => submitTask(true));
 
 refresh();
-setInterval(refresh, 30000);
+setInterval(refresh, 60000);
diff --git a/public/styles.css b/public/styles.css
index 1b96f5f..5341ef3 100644
--- a/public/styles.css
+++ b/public/styles.css
@@ -345,6 +345,11 @@ h3 {
   border-color: color-mix(in srgb, var(--good) 45%, transparent);
 }
 
+.gpu-thumb.abnormal {
+  background: color-mix(in srgb, var(--warn) 22%, transparent);
+  border-color: color-mix(in srgb, var(--warn) 50%, transparent);
+}
+
 .gpu-thumb.busy {
   background: color-mix(in srgb, var(--bad) 22%, transparent);
   border-color: color-mix(in srgb, var(--bad) 50%, transparent);