demo mode: stop synthesizing episode + phase events

Per the data-ownership scope: collect (episodes-ingested counter),
hosts (per-host bars), and db (database explorer) all work fine in
or out of demo mode — they read real values from the server's
snapshot. Demo mode shouldn't be injecting fake `episode` records
into them.

Removed both dispatches from demoTick:
- `episode` (was 70% per tick) — no longer clobbers collect/hosts/db
- `phase` (was 50% per tick) — dead code anyway; baseline now
  consumes the dataset-derived `phase_mix` event, not raw `phase`

demoTick is now just the model_metric jitter (5% per tick) so the
sequence-model bars don't sit frozen during a long demo.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

training/dashboard/static/dashboard.js

@@ -224,19 +224,14 @@
   const demoBtn = document.getElementById('demo-btn');
   let demoTimer = null;
   let demoActive = false;
-  const HOSTS = ['elliott-lab', 'elliott-thinkpad', 'k-gamingcom'];
-  const PHASES = ['clean', 'armed', 'infecting', 'infected_running', 'dormant'];
+  // Demo mode is intentionally narrow: it does NOT synthesize
+  // `episode` events (those would clobber the real ingest counter,
+  // host bars, and database explorer — all of which work fine in or
+  // out of demo mode), and it does NOT synthesize `phase` events
+  // (the baseline scene reads dataset-derived `phase_mix` instead).
+  // The only periodic side-effect is occasional model_metric jitter
+  // so the bars don't sit frozen during a long talk.
   function demoTick() {
-    if (Math.random() < 0.7) {
-      const host = HOSTS[Math.floor(Math.random() * HOSTS.length)];
-      dispatch({ type: 'episode',
-        episode_id: 'demo-' + Math.random().toString(36).slice(2, 12),
-        host_id: host, size_bytes: 30_000 + Math.random() * 20_000 });
-    }
-    if (Math.random() < 0.5) {
-      dispatch({ type: 'phase', phase: PHASES[Math.floor(Math.random() * PHASES.length)] });
-    }
-    // Occasionally tweak a model metric so the bars aren't static.
     if (Math.random() < 0.05) {
       const m = ['knn', 'rnn', 'gru', 'lstm', 'bert'][Math.floor(Math.random() * 5)];
       const base = { knn: 0.736, rnn: 0.872, gru: 0.911, lstm: 0.928, bert: 0.954 }[m];

training/dashboard/static/index.html

@@ -1314,6 +1314,6 @@
     </article>
   </div>
 
-  <script src="/static/dashboard.js?v=883a2c24"></script>
+  <script src="/static/dashboard.js?v=7f41d957"></script>
 </body>
 </html>