Cookbook UI: Ollama browser, advanced serve fold, API tokens form, diagnosis toolbar, polish

Surface a lot of accumulated cookbook + UI work as a single non-agent
commit so the agent rework lands cleanly.

Highlights:
- Ollama as a first-class backend in the Cookbook:
  * Download input accepts ollama-style names (name:tag) → backend=ollama
  * /api/cookbook/ollama/library (cached scrape of ollama.com + curated
    fallback so classic models like qwen2.5 stay reachable)
  * "Browse Ollama library" toggle below Download with size chips
  * Engine=Ollama in hwfit toolbar merges the Ollama library into the
    main scan list as per-tag rows with the same Fit/Param/Quant/VRAM
    columns; click → fills Download input
- API Tokens form added to Integrations panel (matching wired
  loadTokens()/initTokenForm() that had no HTML)
- Serve panel polish: Advanced fold tightening (-8px nudges on vLLM
  checks, Extra args, Spec row), n_cpu_moe + Split Mode controls
  pulled up 8px to align with the row's checkboxes, GGUF File dropdown
  exposed for Ollama backend, GPU re-render on Edit serve restore,
  _forceBackend flag so saved serveState wins over backend detection,
  cookbook:servers-changed CustomEvent so panels don't need refresh
- Models page redesign: Add Models row (URL + hidden API key reveal +
  Type select + Scan/Ollama/Key/Test/Add icon buttons), Probe All +
  Clear-offline buttons in Added Models toolbar, offline-pill removed
  (opacity already conveys state), Engine dropdown gains Ollama option
- _ping_endpoint probes /v1/models then base, accepts 4xx as
  reachable (vLLM returns 404 on bare /v1, fully working endpoints
  were showing offline)
- Diagnosis card: × dismiss + Copy bundle buttons restored on the
  serve error feedback card
- Orphan tmux sweep re-enabled behind a 60s rate-limit + background
  Thread (off the main event loop) so dead serves get discovered
- cookbook_routes auto-register watchdog: drops the endpoint if the
  serve session exits non-zero within the first ~3min
- ollama-rocm sidecar awareness in download wrapper (`docker exec
  ollama-rocm ollama pull` when host ollama isn't installed)
- Skill extractor sets initial_status="published" when
  auto_approve_skills pref is on (audit demotes later)
- Skill list / model list / cookbook scan misc polish

static/js/cookbook-diagnosis.js

@@ -610,12 +610,47 @@ export function _showDiagnosis(panel, diagnosis, sourceText) {
     ? `Suggested action: ${fixes[0].label}.`
     : 'Suggested action: copy the error and adjust the serve settings.');
 
-  // Simplified diagnosis card: just the error message + suggestion + fix
-  // button(s). Removed the fold toggle, copy button, and × dismiss — they
-  // made the card noisy without earning their keep. _diagCollapsed is kept
-  // as a stub so callers don't have to change.
   panel._diagCollapsed = false;
 
+  // Top-right toolbar: Copy bundle + × dismiss. Restored after user feedback
+  // — without them there's no way to quietly close a stale diagnosis or grab
+  // the full error+context for a forum/discord paste.
+  const toolbar = document.createElement('div');
+  toolbar.className = 'cookbook-diag-toolbar';
+  toolbar.style.cssText = 'display:flex;justify-content:flex-end;align-items:center;gap:4px;margin-bottom:-2px;';
+
+  const copyBtn = document.createElement('button');
+  copyBtn.type = 'button';
+  copyBtn.className = 'cookbook-diag-copy';
+  copyBtn.title = 'Copy diagnosis details';
+  copyBtn.setAttribute('aria-label', 'Copy diagnosis');
+  copyBtn.innerHTML = '<svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="9" y="9" width="13" height="13" rx="2" ry="2"/><path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"/></svg>';
+  copyBtn.addEventListener('click', async (e) => {
+    e.stopPropagation();
+    const bundle = _diagnosisCopyBundle(task, diagnosis, sourceText, suggestionText);
+    try {
+      await navigator.clipboard.writeText(bundle);
+      copyBtn.classList.add('copied');
+      setTimeout(() => { if (copyBtn.isConnected) copyBtn.classList.remove('copied'); }, 1200);
+    } catch (_) {}
+  });
+
+  const dismissBtn = document.createElement('button');
+  dismissBtn.type = 'button';
+  dismissBtn.className = 'cookbook-diag-dismiss';
+  dismissBtn.title = 'Dismiss diagnosis';
+  dismissBtn.setAttribute('aria-label', 'Dismiss');
+  dismissBtn.textContent = '×';
+  dismissBtn.addEventListener('click', (e) => {
+    e.stopPropagation();
+    panel._diagDismissed = diagnosis.message;
+    _clearDiagnosis(panel);
+  });
+
+  toolbar.appendChild(copyBtn);
+  toolbar.appendChild(dismissBtn);
+  diag.appendChild(toolbar);
+
   const body = document.createElement('div');
   body.className = 'cookbook-diag-body';
   const msg = document.createElement('div');