feat: on-demand auto-triage from web UI

Adds an "Auto-process queue" button to /admin/triage that lets the
user kick off a full LLM triage pass without SSH. Bridges the gap
between web UI (in container) and claude CLI (host-only).

Architecture:
- UI button POSTs to /admin/triage/request-drain
- Endpoint writes atocore/config/auto_triage_requested_at flag
- Host-side watcher cron (every 2 min) checks for the flag
- When found: clears flag, acquires lock, runs auto_triage.py,
  records progress via atocore/status/* entries
- UI polls /admin/triage/drain-status every 10s to show progress,
  auto-reloads when done

Safety:
- Lock file prevents concurrent runs on host
- Flag cleared before run so duplicate clicks queue at most one re-run
- Fail-open: watcher errors just log, don't break anything
- Status endpoint stays read-only

Installation on host (one-time):
  */2 * * * * /srv/storage/atocore/app/deploy/dalidou/auto-triage-watcher.sh \
    >> /home/papa/atocore-logs/auto-triage-watcher.log 2>&1

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

src/atocore/engineering/triage_ui.py

@@ -74,10 +74,54 @@ async function apiCall(url, method, body) {
       opts.body = JSON.stringify(body);
     }
     const res = await fetch(url, opts);
-    return { ok: res.ok, status: res.status };
+    return { ok: res.ok, status: res.status, json: res.ok ? await res.json().catch(()=>null) : null };
   } catch (e) { return { ok: false, status: 0, error: String(e) }; }
 }
 
+async function requestAutoTriage() {
+  const btn = document.getElementById('auto-triage-btn');
+  const status = document.getElementById('auto-triage-status');
+  if (!btn) return;
+  btn.disabled = true;
+  btn.textContent = '⏳ Requesting...';
+  const r = await apiCall('/admin/triage/request-drain', 'POST');
+  if (r.ok) {
+    status.textContent = '✓ Requested. Host watcher runs every 2 min. Refresh this page in a minute to check progress.';
+    status.className = 'auto-triage-msg ok';
+    btn.textContent = '✓ Requested';
+    pollDrainStatus();
+  } else {
+    status.textContent = '❌ Request failed: ' + r.status;
+    status.className = 'auto-triage-msg err';
+    btn.disabled = false;
+    btn.textContent = '🤖 Auto-process queue';
+  }
+}
+
+async function pollDrainStatus() {
+  const status = document.getElementById('auto-triage-status');
+  const btn = document.getElementById('auto-triage-btn');
+  let polls = 0;
+  const timer = setInterval(async () => {
+    polls++;
+    const r = await apiCall('/admin/triage/drain-status', 'GET');
+    if (!r.ok || !r.json) return;
+    const s = r.json;
+    if (s.is_running) {
+      status.textContent = '⚙️ Auto-triage running on host... (started ' + (s.last_started_at || '?') + ')';
+      status.className = 'auto-triage-msg ok';
+    } else if (s.last_finished_at && !s.requested_at) {
+      status.textContent = '✅ Last run finished: ' + s.last_finished_at + '  →  ' + (s.last_result || 'complete');
+      status.className = 'auto-triage-msg ok';
+      if (btn) { btn.disabled = false; btn.textContent = '🤖 Auto-process queue'; }
+      clearInterval(timer);
+      // Reload page to pick up new queue state
+      setTimeout(() => window.location.reload(), 3000);
+    }
+    if (polls > 60) { clearInterval(timer); }  // stop after ~10 min of polling
+  }, 10000); // poll every 10s
+}
+
 function setStatus(id, msg, ok) {
   const el = document.getElementById('status-' + id);
   if (!el) return;
@@ -185,6 +229,13 @@ _TRIAGE_CSS = """
   .cand-status.ok { color:#059669; }
   .cand-status.err { color:#dc2626; }
   .empty { text-align:center; padding:3rem; opacity:0.6; }
+  .auto-triage-bar { display:flex; gap:0.8rem; align-items:center; background:var(--card); border:1px solid var(--border); border-radius:6px; padding:0.7rem 1rem; margin-bottom:1.2rem; flex-wrap:wrap; }
+  .auto-triage-bar button { padding:0.55rem 1.1rem; border:1px solid var(--accent); background:var(--accent); color:white; border-radius:4px; cursor:pointer; font-weight:600; font-size:0.95rem; }
+  .auto-triage-bar button:hover:not(:disabled) { opacity:0.9; }
+  .auto-triage-bar button:disabled { opacity:0.5; cursor:not-allowed; }
+  .auto-triage-msg { flex:1; min-width:200px; font-size:0.85rem; opacity:0.75; }
+  .auto-triage-msg.ok { color:var(--accent); opacity:1; font-weight:500; }
+  .auto-triage-msg.err { color:#dc2626; opacity:1; font-weight:500; }
 </style>
 """
 
@@ -221,6 +272,15 @@ def render_triage_page(limit: int = 100) -> str:
         if needed, then promote or reject. Shortcuts: <kbd>Y</kbd> promote · <kbd>N</kbd>
         reject · <kbd>E</kbd> edit · <kbd>S</kbd> scroll to next.
       </div>
+      <div class="auto-triage-bar">
+        <button id="auto-triage-btn" onclick="requestAutoTriage()" title="Run auto_triage on Dalidou host">
+          🤖 Auto-process queue
+        </button>
+        <span id="auto-triage-status" class="auto-triage-msg">
+          Sends the full queue through LLM triage on the host. Promotes durable facts,
+          rejects noise, leaves only ambiguous items here for you.
+        </span>
+      </div>
       {cards_html}
     """ + _TRIAGE_SCRIPT