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/workflows.css

@@ -0,0 +1,37 @@
+/* Workflows page (WP-D) — extends base.css, never overrides its variables. */
+
+.wf-json-textarea {
+  font-family: var(--font-mono);
+  min-height: 200px;
+}
+
+.wf-json-textarea-lg {
+  min-height: 320px;
+  font-size: 0.8rem;
+}
+
+.wf-checkbox-label {
+  display: flex;
+  align-items: center;
+  gap: var(--space-sm);
+  font-size: 0.8rem;
+  color: var(--text-secondary);
+  cursor: pointer;
+}
+
+.wf-required {
+  color: var(--accent-red);
+}
+
+/* base.css defines .lt-field-error as a hook (see base.js field validation)
+   but ships no visual style for it — Workflows renders it directly for
+   JSON-parse / server-side errors, so give it one here. */
+.lt-field-error {
+  color: var(--accent-red);
+  font-size: 0.72rem;
+  letter-spacing: 0.02em;
+}
+
+.wf-input-invalid {
+  border-color: var(--accent-red) !important;
+}