feat(ui): TDS migration stage 2 — six page views and page modules

- Dashboard, Workers, Workflows, Executions, Quick Command, Scheduler pages on the
  shared layout, all behaviour via Pulse delegated actions (no inline handlers)
- Executions: server-driven Manual/Automated views, compare mode, detail modal with all
  log types, ?open= deep link, cross-page re-run via sessionStorage
- Workflows: run modal (dry-run available for every workflow), create modal pre-filled
  with the example definition
- Fix EJS comment in page-header partial that broke rendering

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HamVMDrA8RqhyxmUHgiqRp

public/assets/pages/dashboard.css

@@ -0,0 +1,36 @@
+/* Dashboard page (WP-C) — recent executions / workers summary layout. */
+.dash-worker-list {
+  display: flex;
+  flex-direction: column;
+}
+
+.dash-worker-row {
+  padding: var(--space-sm) var(--space-md);
+  border-bottom: 1px solid var(--border-color-dim);
+}
+.dash-worker-row:last-child { border-bottom: none; }
+
+.dash-worker-main {
+  display: flex;
+  align-items: center;
+  gap: var(--space-sm);
+  flex-wrap: wrap;
+}
+
+.dash-worker-name {
+  font-weight: 700;
+}
+
+.dash-worker-lastseen {
+  font-size: 0.7rem;
+  color: var(--text-muted);
+  margin-left: auto;
+}
+
+.dash-worker-stats {
+  display: flex;
+  gap: var(--space-md);
+  font-size: 0.7rem;
+  color: var(--text-secondary);
+  margin-top: 4px;
+}