feat(ui): fold the Workflows page into Dashboard → Analytics → Workflow

The workflow analytics now render under the Analytics tab's Workflow
sub-tab; ?tab= and ?sub= deep-link the Dashboard, /workflows redirects there,
and the sidebar drops its Workflows item.

client/src/components/DocumentTitle.tsx

@@ -24,8 +24,6 @@ export function DocumentTitle() {
     title = `${t("sessions")} · ${sessionId.slice(0, 8)}`;
   } else if (path.startsWith("/sessions")) {
     title = t("sessions");
-  } else if (path.startsWith("/workflows")) {
-    title = t("workflows");
   } else if (path.startsWith("/workspace")) {
     title = t("workspace");
   } else if (path.startsWith("/settings")) {

client/src/components/Sidebar.tsx

@@ -55,7 +55,6 @@ import {
   LayoutDashboard,
   FolderOpen,
   BarChart3,
-  Workflow,
   Play,
   Settings,
   Wifi,
@@ -89,7 +88,6 @@ function isUpdatePayload(x: unknown): x is UpdateStatusPayload {
 const NAV_KEYS = [
   { to: "/", icon: LayoutDashboard, key: "nav:dashboard" },
   { to: "/sessions", icon: FolderOpen, key: "nav:sessions" },
-  { to: "/workflows", icon: Workflow, key: "nav:workflows" },
   { to: "/workspace", icon: Play, key: "nav:workspace" },
   { to: "/settings", icon: Settings, key: "nav:settings" },
 ] as const;

client/src/components/__tests__/DocumentTitle.test.tsx

@@ -33,7 +33,6 @@ describe("DocumentTitle", () => {
   it("titles the other top-level routes", () => {
     expect(titleFor("/")).toMatch(/^Dashboard · /);
     expect(titleFor("/sessions")).toMatch(/^Sessions · /);
-    expect(titleFor("/workflows")).toMatch(/^Workflows · /);
     expect(titleFor("/settings")).toMatch(/^Settings · /);
   });
 });