diff --git a/messages/de.json b/messages/de.json
index 4f600dbab..e1a27e32d 100644
--- a/messages/de.json
+++ b/messages/de.json
@@ -3817,7 +3817,7 @@
         "subtitle": "Wähle, welche Erinnerungen du erhältst."
       },
       "layout": {
-        "title": "Layout",
+        "title": "Dashboard",
         "description": "Lege fest, wie Dashboard und Insights aufgebaut und angeordnet sind.",
         "backToHub": "Zurück zu Layout & Personalisierung",
         "dashboard": {
diff --git a/messages/en.json b/messages/en.json
index 0c7cde8de..2dcf994be 100644
--- a/messages/en.json
+++ b/messages/en.json
@@ -3817,7 +3817,7 @@
         "subtitle": "Choose which reminders you receive."
       },
       "layout": {
-        "title": "Layout",
+        "title": "Dashboard",
         "description": "Arrange how the dashboard and insights are laid out.",
         "backToHub": "Back to Layout & Personalization",
         "dashboard": {
diff --git a/messages/es.json b/messages/es.json
index 7899eb0a7..4b61aeb82 100644
--- a/messages/es.json
+++ b/messages/es.json
@@ -3817,7 +3817,7 @@
         "subtitle": "Elige qué recordatorios recibes."
       },
       "layout": {
-        "title": "Diseño",
+        "title": "Panel",
         "description": "Organiza cómo están dispuestos el panel y los análisis.",
         "backToHub": "Volver a Diseño y personalización",
         "dashboard": {
diff --git a/messages/fr.json b/messages/fr.json
index e923ab65c..16210e300 100644
--- a/messages/fr.json
+++ b/messages/fr.json
@@ -3817,7 +3817,7 @@
         "subtitle": "Choisissez les rappels que vous recevez."
       },
       "layout": {
-        "title": "Disposition",
+        "title": "Tableau de bord",
         "description": "Organisez la disposition du tableau de bord et des analyses.",
         "backToHub": "Retour à Disposition et personnalisation",
         "dashboard": {
diff --git a/messages/it.json b/messages/it.json
index 5a4fece9a..3575c4db8 100644
--- a/messages/it.json
+++ b/messages/it.json
@@ -3817,7 +3817,7 @@
         "subtitle": "Scegli quali promemoria ricevere."
       },
       "layout": {
-        "title": "Layout",
+        "title": "Cruscotto",
         "description": "Organizza la disposizione del cruscotto e degli approfondimenti.",
         "backToHub": "Torna a Layout e personalizzazione",
         "dashboard": {
diff --git a/messages/pl.json b/messages/pl.json
index e99e307cc..04cd5b0fb 100644
--- a/messages/pl.json
+++ b/messages/pl.json
@@ -3817,7 +3817,7 @@
         "subtitle": "Wybierz, które przypomnienia otrzymujesz."
       },
       "layout": {
-        "title": "Układ",
+        "title": "Pulpit",
         "description": "Ustal, jak rozłożone są pulpit i analizy.",
         "backToHub": "Powrót do Układ i personalizacja",
         "dashboard": {
diff --git a/src/components/layout/__tests__/nav-model.test.ts b/src/components/layout/__tests__/nav-model.test.ts
index 0ee21814b..89c8c6c7b 100644
--- a/src/components/layout/__tests__/nav-model.test.ts
+++ b/src/components/layout/__tests__/nav-model.test.ts
@@ -50,9 +50,13 @@ describe("nav-model destination list", () => {
     expect(hrefs).toContain("/vorsorge");
     const vorsorge = NAV_DESTINATIONS.find((d) => d.href === "/vorsorge");
     expect(vorsorge?.tKey).toBe("nav.vorsorge");
-    // Peer to Labs: sits in the clinical spine, before Insights.
-    expect(hrefs.indexOf("/labs")).toBeLessThan(hrefs.indexOf("/vorsorge"));
-    expect(hrefs.indexOf("/vorsorge")).toBeLessThan(hrefs.indexOf("/insights"));
+    // v1.19.1 (S4) — the fixed spine is Medications → Vorsorge → Labs →
+    // Illness → Insights, so Vorsorge sits after Medications and before Labs.
+    expect(hrefs.indexOf("/medications")).toBeLessThan(
+      hrefs.indexOf("/vorsorge"),
+    );
+    expect(hrefs.indexOf("/vorsorge")).toBeLessThan(hrefs.indexOf("/labs"));
+    expect(hrefs.indexOf("/labs")).toBeLessThan(hrefs.indexOf("/insights"));
   });
 
   it("does not list Recovery as a left-nav destination (it is an Insights pill)", () => {
@@ -99,15 +103,17 @@ describe("nav-model utility tail (N-1 — one shared list)", () => {
 });
 
 describe("visibleNavDestinations module gate", () => {
-  it("includes Cycle (between Medications and Insights) only when its module is enabled", () => {
+  it("includes Cycle (between Mood and Medications) only when its module is enabled", () => {
     // v1.18.0 — cycle is `requiresModule: "cycle"` and reads the delegated
     // `cycle` key from the same resolved module map every other gate uses.
+    // v1.19.1 (S4) — cycle sits in the head block, after Mood and before the
+    // fixed Medications → … → Achievements spine.
     const off = visibleNavDestinations({ cycle: false }).map((d) => d.href);
     const on = visibleNavDestinations({ cycle: true }).map((d) => d.href);
     expect(off).not.toContain("/cycle");
     expect(on).toContain("/cycle");
-    expect(on.indexOf("/medications")).toBeLessThan(on.indexOf("/cycle"));
-    expect(on.indexOf("/cycle")).toBeLessThan(on.indexOf("/insights"));
+    expect(on.indexOf("/mood")).toBeLessThan(on.indexOf("/cycle"));
+    expect(on.indexOf("/cycle")).toBeLessThan(on.indexOf("/medications"));
   });
 
   it("drops a module-gated entry (mood / labs / coach / achievements / insights / medications) when its module is disabled", () => {
diff --git a/src/components/layout/__tests__/sidebar-nav.test.tsx b/src/components/layout/__tests__/sidebar-nav.test.tsx
index 14e46af07..049694844 100644
--- a/src/components/layout/__tests__/sidebar-nav.test.tsx
+++ b/src/components/layout/__tests__/sidebar-nav.test.tsx
@@ -109,17 +109,18 @@ describe("<SidebarNav> cycle entry gate (v1.15.0 / v1.18.0 module map)", () => {
     expect(html).not.toContain('href="/cycle"');
   });
 
-  it("places the Cycle entry between Medications and Insights when enabled", () => {
+  it("places the Cycle entry between Mood and Medications when enabled", () => {
     const html = render({ modules: { cycle: true } });
-    const med = html.indexOf('href="/medications"');
+    const mood = html.indexOf('href="/mood"');
     const cycle = html.indexOf('href="/cycle"');
-    const insights = html.indexOf('href="/insights"');
-    expect(med).toBeGreaterThan(-1);
+    const med = html.indexOf('href="/medications"');
+    expect(mood).toBeGreaterThan(-1);
     expect(cycle).toBeGreaterThan(-1);
-    expect(insights).toBeGreaterThan(-1);
-    // Cycle sits after Medications and before Insights in document order.
-    expect(med).toBeLessThan(cycle);
-    expect(cycle).toBeLessThan(insights);
+    expect(med).toBeGreaterThan(-1);
+    // v1.19.1 (S4) — Cycle sits after Mood and before Medications in document
+    // order; Medications opens the fixed clinical/insight spine below it.
+    expect(mood).toBeLessThan(cycle);
+    expect(cycle).toBeLessThan(med);
   });
 });
 
diff --git a/src/components/layout/nav-model.ts b/src/components/layout/nav-model.ts
index c8f083d31..c0c94a18d 100644
--- a/src/components/layout/nav-model.ts
+++ b/src/components/layout/nav-model.ts
@@ -63,6 +63,10 @@ export interface NavDestination {
  * (after Medications) and is filtered out when the account gate is off;
  * the order is otherwise identical for both surfaces.
  */
+// v1.19.1 (S4) — the clinical/insight spine below the dashboard/measurements/
+// mood/cycle head follows one fixed sequence, each entry directly below the
+// previous: Medications → Vorsorge → Labs → Illness → Insights → Coach →
+// Achievements. A disabled module simply drops out; the rest keep this order.
 export const NAV_DESTINATIONS: ReadonlyArray<NavDestination> = [
   { href: "/", tKey: "nav.dashboard", icon: Home, tourId: "nav-dashboard" },
   {
@@ -78,6 +82,13 @@ export const NAV_DESTINATIONS: ReadonlyArray<NavDestination> = [
     tourId: "nav-mood",
     requiresModule: "mood",
   },
+  {
+    href: "/cycle",
+    tKey: "nav.cycle",
+    icon: Droplets,
+    tourId: "nav-cycle",
+    requiresModule: "cycle",
+  },
   {
     href: "/medications",
     tKey: "nav.medications",
@@ -87,12 +98,23 @@ export const NAV_DESTINATIONS: ReadonlyArray<NavDestination> = [
     // module; the nav entry now drops when the account turns the module off.
     requiresModule: "medications",
   },
+  // v1.17.1 — Vorsorge (preventive-care) gets a top-level nav home in the
+  // clinical spine. It is a first-class tracking surface ("wann muss ich was
+  // wo machen"), not pure configuration, so it belongs in the model both bars
+  // render — not buried three taps deep under Settings → Reminders. The
+  // Reminders hub still links to it; this is the direct front door.
   {
-    href: "/cycle",
-    tKey: "nav.cycle",
-    icon: Droplets,
-    tourId: "nav-cycle",
-    requiresModule: "cycle",
+    href: "/vorsorge",
+    tKey: "nav.vorsorge",
+    icon: Stethoscope,
+    tourId: "nav-vorsorge",
+    // v1.18.1 — deliberately NOT module-gated (no `requiresModule`). Unlike
+    // labs / illness / cycle (opt-in clinical-spine verticals born off by
+    // default), preventive-care reminders are a CORE surface available to
+    // every account from birth: a reminder can target core vitals
+    // (weight / BP / pulse) that are never behind a module toggle, and a
+    // free-text "Großes Blutbild" reminder belongs to no module at all.
+    // Gating the entry would orphan reminders the user can still create.
   },
   {
     href: "/labs",
@@ -112,25 +134,6 @@ export const NAV_DESTINATIONS: ReadonlyArray<NavDestination> = [
     tourId: "nav-illness",
     requiresModule: "illness",
   },
-  // v1.17.1 — Vorsorge (preventive-care) gets a top-level nav home in the
-  // clinical spine, peer to Labs and Recovery. It is a first-class tracking
-  // surface ("wann muss ich was wo machen"), not pure configuration, so it
-  // belongs in the model both bars render — not buried three taps deep under
-  // Settings → Reminders. The Reminders hub still links to it; this is the
-  // direct front door so the customer knows where it lives.
-  {
-    href: "/vorsorge",
-    tKey: "nav.vorsorge",
-    icon: Stethoscope,
-    tourId: "nav-vorsorge",
-    // v1.18.1 — deliberately NOT module-gated (no `requiresModule`). Unlike
-    // labs / illness / cycle (opt-in clinical-spine verticals born off by
-    // default), preventive-care reminders are a CORE surface available to
-    // every account from birth: a reminder can target core vitals
-    // (weight / BP / pulse) that are never behind a module toggle, and a
-    // free-text "Großes Blutbild" reminder belongs to no module at all.
-    // Gating the entry would orphan reminders the user can still create.
-  },
   // v1.18.0 — Workouts and Recovery both left the left-nav: each already
   // surfaces as an Insights tab-strip pill (`/insights/workouts` gated on
   // a workout row, `/insights/recovery` always present), so neither is a
diff --git a/src/components/settings/__tests__/settings-shell.test.tsx b/src/components/settings/__tests__/settings-shell.test.tsx
index da80f4bed..ebdc1945e 100644
--- a/src/components/settings/__tests__/settings-shell.test.tsx
+++ b/src/components/settings/__tests__/settings-shell.test.tsx
@@ -284,9 +284,11 @@ describe("<SettingsShell>", () => {
     // `/notifications` inbox now shares the "Notifications" label.
     expect(html).toContain("Notifications");
     // v1.17.1 (F-2) — the dashboard + insights arrangement editors are
-    // reached through one Layout hub entry. v1.18.1 (D6) — renamed to "Layout".
+    // reached through one hub entry (route stays `/settings/layout`).
+    // v1.19.1 (S3) — the nav label now reads "Dashboard" to match where
+    // it leads; the route is unchanged.
     expect(html).toContain('href="/settings/layout"');
-    expect(html).toContain(">Layout</a>");
+    expect(html).toContain(">Dashboard</a>");
     // v1.18.1 (D4) — Channels + Sources are their own left-side entries.
     expect(html).toContain('href="/settings/channels"');
     expect(html).toContain('href="/settings/sources"');
@@ -322,10 +324,11 @@ describe("<SettingsShell>", () => {
     // compound "Benachrichtigungs-Kanäle" wrapped). The `/notifications`
     // inbox now shares the "Benachrichtigungen" label.
     expect(html).toContain("Benachrichtigungen");
-    // v1.17.1 (F-2) — the arrangement editors are reached through one
-    // Layout hub entry. v1.18.1 (D6) — renamed to "Layout" in every locale.
+    // v1.17.1 (F-2) — the arrangement editors are reached through one hub
+    // entry (route stays `/settings/layout`). v1.19.1 (S3) — the nav label
+    // reads "Dashboard" in every locale to match where it leads.
     expect(html).toContain('href="/settings/layout"');
-    expect(html).toContain(">Layout</a>");
+    expect(html).toContain(">Dashboard</a>");
     // v1.18.1 (D4) — Channels ("Kanäle") + Sources ("Quellen-Priorität")
     // are their own left-side entries.
     expect(html).toContain('href="/settings/channels"');