diff --git a/frontend/index.html b/frontend/index.html
index b57c92e..cae60a2 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -14,6 +14,9 @@ header { position: sticky; top: 0; z-index: 20; padding: 12px 16px; display:flex
 button { background: linear-gradient(180deg,#1f3a5f,#15324d); border:1px solid #2a496e; color:#e5e7eb; padding:8px 12px; border-radius:10px; cursor:pointer; }
 button:hover { filter: brightness(1.15); }
 .panel { border: 1px solid #1b2d45; border-radius: 14px; padding: 12px; background: rgba(11,21,38,.92); }
+.panel > summary { cursor: pointer; list-style-position: inside; }
+.panel > summary h2 { display: inline-block; margin-left: 4px; }
+.panel[open] > summary { margin-bottom: 8px; }
 aside, section { position: relative; z-index: 1; }
 main { position: relative; z-index: 1; display: grid; grid-template-columns: 300px 1fr 340px; gap: 14px; padding: 14px; }
 @media (max-width: 1100px) { main { grid-template-columns: 1fr; } }
@@ -68,7 +71,8 @@ textarea { resize: vertical; min-height: 120px; }
 
 <main>
   <aside class="sidebar">
-    <div class="panel stack">
+    <details class="panel stack" data-panel-key="context" open>
+      <summary><h2>Context &amp; view</h2></summary>
       <div>
         <h2>Context</h2>
         <div class="muted" id="context">Loading…</div>
@@ -77,41 +81,41 @@ textarea { resize: vertical; min-height: 120px; }
         <h2>View</h2>
         <div class="muted" id="view-hint">—</div>
       </div>
-    </div>
-    <div class="panel stack">
-      <h2>AI Stream</h2>
+    </details>
+    <details class="panel stack" data-panel-key="ai-stream" open>
+      <summary><h2>AI Stream</h2></summary>
       <div id="ai" class="muted">Loading…</div>
-    </div>
+    </details>
   </aside>
 
   <section class="stack" id="work">
-    <div class="panel" id="issues">
-      <h2>Issues</h2>
-      <div class="muted">Loading…</div>
-    </div>
-    <div class="panel" id="prs">
-      <h2>Pull Requests</h2>
-      <div class="muted">Loading…</div>
-    </div>
-    <div class="panel">
-      <h2>Live Widgets</h2>
+    <details class="panel" id="issues" data-panel-key="issues" open>
+      <summary><h2>Issues</h2></summary>
+      <div id="issues-content" class="muted">Loading…</div>
+    </details>
+    <details class="panel" id="prs" data-panel-key="pull-requests" open>
+      <summary><h2>Pull Requests</h2></summary>
+      <div id="prs-content" class="muted">Loading…</div>
+    </details>
+    <details class="panel" data-panel-key="widgets" open>
+      <summary><h2>Live Widgets</h2></summary>
       <div id="widgets" class="stack"></div>
-    </div>
+    </details>
   </section>
 
   <aside class="sidebar">
-    <div class="panel stack">
-      <h2>Layout</h2>
+    <details class="panel stack" data-panel-key="layout" open>
+      <summary><h2>Layout</h2></summary>
       <div class="muted" id="layout-hint">—</div>
-    </div>
-    <div class="panel stack">
-      <h2>Markdown</h2>
+    </details>
+    <details class="panel stack" data-panel-key="markdown" open>
+      <summary><h2>Markdown</h2></summary>
       <textarea id="md-input" placeholder="# Write markdown here...
 - bullet
 - **bold**
 - `code`"></textarea>
       <div id="md-preview" style="margin-top:8px;"></div>
-    </div>
+    </details>
   </aside>
 </main>
 
@@ -143,6 +147,27 @@ textarea { resize: vertical; min-height: 120px; }
 (function(){
   const qs = (s, el=document) => el.querySelector(s);
   const fmt = (d) => new Date(d).toLocaleString();
+  const PANEL_STATE_KEY = "stackchain.panel-state.v1";
+  const panels = Array.from(document.querySelectorAll('details[data-panel-key]'));
+  let savedState = {};
+  try {
+    savedState = JSON.parse(localStorage.getItem(PANEL_STATE_KEY) || '{}');
+  } catch (e) {
+    savedState = {};
+  }
+  panels.forEach((panel) => {
+    if (Object.prototype.hasOwnProperty.call(savedState, panel.dataset.panelKey)) {
+      panel.open = savedState[panel.dataset.panelKey];
+    }
+    panel.addEventListener('toggle', () => {
+      const state = Object.fromEntries(panels.map((item) => [item.dataset.panelKey, item.open]));
+      try {
+        localStorage.setItem(PANEL_STATE_KEY, JSON.stringify(state));
+      } catch (e) {
+        console.warn('Could not persist panel state', e);
+      }
+    });
+  });
   let liveMode = true;
 
   function setStatus(msg) { qs('#status').textContent = msg || 'Live'; }
@@ -162,14 +187,14 @@ textarea { resize: vertical; min-height: 120px; }
         '<div class="label">PRs</div><div class="value">' + (data.pull_requests?.length || 0) + '</div></div>';
       qs('#view-hint').textContent = 'Active view: ' + (data.view || 'dashboard');
 
-      const issuesBox = qs('#issues');
+      const issuesBox = qs('#issues-content');
       const openIssues = (data.issues || []).filter(i => i.state === 'open').slice(0, 12);
-      issuesBox.innerHTML = '<h2>Issues</h2>' + (openIssues.length ? openIssues.map(i => '<div style="margin:6px 0;"><a href="' + escAttr(i.url) + '" target="_blank">#' + i.number + ' ' + escapeHtml(i.title) + '</a>' +
+      issuesBox.innerHTML = (openIssues.length ? openIssues.map(i => '<div style="margin:6px 0;"><a href="' + escAttr(i.url) + '" target="_blank">#' + i.number + ' ' + escapeHtml(i.title) + '</a>' +
         '<div class="muted">' + (i.labels || []).map(l => '<span class="pill">' + escapeHtml(String(l)) + '</span>').join(' ') + '</div></div>').join('') : '<div class="muted">No open issues.</div>');
 
-      const prsBox = qs('#prs');
+      const prsBox = qs('#prs-content');
       const openPrs = (data.pull_requests || []).slice(0, 12);
-      prsBox.innerHTML = '<h2>Pull Requests</h2>' + (openPrs.length ? openPrs.map(p => '<div style="margin:6px 0;"><a href="' + escAttr(p.url) + '" target="_blank">#' + p.number + ' ' + escapeHtml(p.title) + '</a>' +
+      prsBox.innerHTML = (openPrs.length ? openPrs.map(p => '<div style="margin:6px 0;"><a href="' + escAttr(p.url) + '" target="_blank">#' + p.number + ' ' + escapeHtml(p.title) + '</a>' +
         '<div class="muted">' + escapeHtml(p.state) + ' by ' + escapeHtml(String(p.user || '')) + '</div></div>').join('') : '<div class="muted">No PRs.</div>');
 
       paintDeltas(data.deltas || []);
@@ -186,11 +211,11 @@ textarea { resize: vertical; min-height: 120px; }
         { number: 8, title: 'Live UI implementation', state: 'open', labels: ['frontend'], url: '#8' },
         { number: 37, title: 'Docker build and push', state: 'open', labels: ['devops'], url: '#37' },
       ];
-      qs('#issues').innerHTML = '<h2>Issues</h2>' + mockIssues.map(i => '<div style="margin:6px 0;"><a href="' + escAttr(i.url) + '">#' + i.number + ' ' + escapeHtml(i.title) + '</a><div class="muted">' + (i.labels||[]).map(l=>'<span class="pill">'+escapeHtml(String(l))+'</span>').join(' ') + '</div></div>').join('');
+      qs('#issues-content').innerHTML = mockIssues.map(i => '<div style="margin:6px 0;"><a href="' + escAttr(i.url) + '">#' + i.number + ' ' + escapeHtml(i.title) + '</a><div class="muted">' + (i.labels||[]).map(l=>'<span class="pill">'+escapeHtml(String(l))+'</span>').join(' ') + '</div></div>').join('');
       const mockPrs = [
         { number: 4, title: 'Agent UI delta binding', state: 'open', user: 'turdbot', url: '#4' },
       ];
-      qs('#prs').innerHTML = '<h2>Pull Requests</h2>' + mockPrs.map(p => '<div style="margin:6px 0;"><a href="' + escAttr(p.url) + '">#' + p.number + ' ' + escapeHtml(p.title) + '</a><div class="muted">' + escapeHtml(p.state) + ' by ' + escapeHtml(String(p.user||'')) + '</div></div>').join('');
+      qs('#prs-content').innerHTML = mockPrs.map(p => '<div style="margin:6px 0;"><a href="' + escAttr(p.url) + '">#' + p.number + ' ' + escapeHtml(p.title) + '</a><div class="muted">' + escapeHtml(p.state) + ' by ' + escapeHtml(String(p.user||'')) + '</div></div>').join('');
       paintDeltas([
         {panel:'triage', action:'open', target:'#1', priority:'high'},
         {panel:'review', action:'review', target:'#4', priority:'medium'},
diff --git a/tests/test_panel_persistence.py b/tests/test_panel_persistence.py
new file mode 100644
index 0000000..cde63a6
--- /dev/null
+++ b/tests/test_panel_persistence.py
@@ -0,0 +1,22 @@
+from pathlib import Path
+
+
+DASHBOARD = Path("frontend/index.html")
+
+
+def test_dashboard_panels_are_independently_collapsible():
+    html = DASHBOARD.read_text()
+
+    for panel_key in ("context", "ai-stream", "issues", "pull-requests", "widgets", "layout", "markdown"):
+        assert f'<details class="panel' in html
+        assert f'data-panel-key="{panel_key}"' in html
+
+
+def test_panel_open_state_is_restored_and_saved_in_local_storage():
+    html = DASHBOARD.read_text()
+
+    assert 'const PANEL_STATE_KEY = "stackchain.panel-state.v1"' in html
+    assert "localStorage.getItem(PANEL_STATE_KEY)" in html
+    assert "panel.open = savedState[panel.dataset.panelKey]" in html
+    assert "localStorage.setItem(PANEL_STATE_KEY" in html
+    assert "panel.addEventListener('toggle'" in html