feat: cleanup + screenshot buttons in sidebar inspector toolbar

Two action buttons in the inspector toolbar:
- Cleanup (🧹): POSTs cleanup --all to server, shows spinner, chat
  notification on success, resets inspector state (element may be removed)
- Screenshot (📸): POSTs screenshot to server, shows spinner, chat
  notification with saved file path

Shared infrastructure:
- .inspector-action-btn CSS with loading spinner via ::after pseudo-element
- chat-notification type in addChatEntry() for system messages
- package.json version bump to 0.13.9.0

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

extension/sidepanel.css

@@ -221,6 +221,13 @@ body::after {
   color: #000;
   border-bottom-right-radius: var(--radius-sm);
 }
+.chat-notification {
+  text-align: center;
+  font-size: 11px;
+  color: var(--text-meta);
+  padding: 4px 12px;
+  font-family: var(--font-mono);
+}
 .chat-bubble.assistant {
   align-self: flex-start;
   background: var(--bg-surface);
@@ -808,6 +815,56 @@ footer {
   line-height: 1;
 }
 
+/* ─── Action Buttons (Cleanup, Screenshot) ─────────────────── */
+
+.inspector-action-btn {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  height: 28px;
+  width: 28px;
+  padding: 0;
+  background: none;
+  border: 1px solid var(--zinc-600);
+  border-radius: var(--radius-sm);
+  color: var(--text-label);
+  font-size: 14px;
+  cursor: pointer;
+  transition: all 150ms;
+  flex-shrink: 0;
+}
+
+.inspector-action-btn:hover {
+  background: rgba(255, 255, 255, 0.05);
+  color: var(--text-body);
+  border-color: var(--zinc-400);
+}
+
+.inspector-action-btn:active {
+  transform: scale(0.95);
+}
+
+.inspector-action-btn.loading {
+  pointer-events: none;
+  opacity: 0.5;
+  position: relative;
+}
+
+.inspector-action-btn.loading::after {
+  content: '';
+  position: absolute;
+  width: 12px;
+  height: 12px;
+  border: 2px solid var(--zinc-600);
+  border-top-color: var(--amber-400);
+  border-radius: 50%;
+  animation: spin 0.6s linear infinite;
+}
+
+@keyframes spin {
+  to { transform: rotate(360deg); }
+}
+
 .inspector-selected {
   font-family: var(--font-mono);
   font-size: 11px;

extension/sidepanel.html

@@ -60,6 +60,9 @@
       </button>
       <span class="inspector-selected" id="inspector-selected"></span>
       <span class="inspector-mode-badge" id="inspector-mode-badge" style="display:none"></span>
+      <div style="flex:1"></div>
+      <button id="inspector-cleanup-btn" class="inspector-action-btn" title="Remove ads, banners, popups">🧹</button>
+      <button id="inspector-screenshot-btn" class="inspector-action-btn" title="Take a screenshot">📸</button>
     </div>
 
     <!-- Inspector content area -->

extension/sidepanel.js

@@ -135,6 +135,16 @@ function addChatEntry(entry) {
     return;
   }
 
+  // System notifications (cleanup, screenshot, errors)
+  if (entry.type === 'notification') {
+    const note = document.createElement('div');
+    note.className = 'chat-notification';
+    note.textContent = entry.message;
+    chatMessages.appendChild(note);
+    note.scrollIntoView({ behavior: 'smooth', block: 'end' });
+    return;
+  }
+
   // Agent streaming events
   if (entry.role === 'agent') {
     handleAgentEvent(entry);
@@ -1139,6 +1149,74 @@ inspectorSendBtn.addEventListener('click', () => {
   chrome.runtime.sendMessage({ type: 'sidebar-command', message });
 });
 
+// ─── Cleanup Button ─────────────────────────────────────────────
+
+const inspectorCleanupBtn = document.getElementById('inspector-cleanup-btn');
+if (inspectorCleanupBtn) {
+  inspectorCleanupBtn.addEventListener('click', async () => {
+    if (inspectorCleanupBtn.classList.contains('loading')) return;
+    if (!serverUrl || !serverToken) {
+      addChatEntry({ type: 'notification', message: 'Not connected to browse server' });
+      return;
+    }
+    inspectorCleanupBtn.classList.add('loading');
+    try {
+      const resp = await fetch(`${serverUrl}/command`, {
+        method: 'POST',
+        headers: { ...authHeaders(), 'Content-Type': 'application/json' },
+        body: JSON.stringify({ command: 'cleanup', args: ['--all'] }),
+        signal: AbortSignal.timeout(15000),
+      });
+      const text = await resp.text();
+      if (resp.ok) {
+        addChatEntry({ type: 'notification', message: text || 'Page cleaned up' });
+        // Reset inspector — selected element may have been removed
+        inspectorShowEmpty();
+      } else {
+        const err = JSON.parse(text).error || 'Cleanup failed';
+        addChatEntry({ type: 'notification', message: 'Error: ' + err });
+      }
+    } catch (err) {
+      addChatEntry({ type: 'notification', message: 'Cleanup failed: ' + err.message });
+    } finally {
+      inspectorCleanupBtn.classList.remove('loading');
+    }
+  });
+}
+
+// ─── Screenshot Button ──────────────────────────────────────────
+
+const inspectorScreenshotBtn = document.getElementById('inspector-screenshot-btn');
+if (inspectorScreenshotBtn) {
+  inspectorScreenshotBtn.addEventListener('click', async () => {
+    if (inspectorScreenshotBtn.classList.contains('loading')) return;
+    if (!serverUrl || !serverToken) {
+      addChatEntry({ type: 'notification', message: 'Not connected to browse server' });
+      return;
+    }
+    inspectorScreenshotBtn.classList.add('loading');
+    try {
+      const resp = await fetch(`${serverUrl}/command`, {
+        method: 'POST',
+        headers: { ...authHeaders(), 'Content-Type': 'application/json' },
+        body: JSON.stringify({ command: 'screenshot', args: [] }),
+        signal: AbortSignal.timeout(15000),
+      });
+      const text = await resp.text();
+      if (resp.ok) {
+        addChatEntry({ type: 'notification', message: text || 'Screenshot saved' });
+      } else {
+        const err = JSON.parse(text).error || 'Screenshot failed';
+        addChatEntry({ type: 'notification', message: 'Error: ' + err });
+      }
+    } catch (err) {
+      addChatEntry({ type: 'notification', message: 'Screenshot failed: ' + err.message });
+    } finally {
+      inspectorScreenshotBtn.classList.remove('loading');
+    }
+  });
+}
+
 // ─── Section Toggles ────────────────────────────────────────────
 
 document.querySelectorAll('.inspector-section-toggle').forEach(toggle => {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "gstack",
-  "version": "0.13.8.0",
+  "version": "0.13.9.0",
   "description": "Garry's Stack — Claude Code skills + fast headless browser. One repo, one install, entire AI engineering workflow.",
   "license": "MIT",
   "type": "module",