Add branding splash and simulator cycle timing

backend/app/main.py

@@ -331,19 +331,23 @@ def run_simulator_scenario(payload: SimulatorScenarioCreate, db: Session = Depen
     elif payload.scenario == "cycle_signal_edge":
         current_value = machine.cycle_signal_edge != "falling"
         previous_value = not current_value
+        last_cycle_at = None
+        if machine.last_cycle_at is not None:
+            last_cycle_at = machine.last_cycle_at.replace(tzinfo=UTC) if machine.last_cycle_at.tzinfo is None else machine.last_cycle_at.astimezone(UTC)
+        current_event_time = last_cycle_at + timedelta(seconds=cycle_time_sec) if last_cycle_at is not None else now
         events.extend(
             [
                 SimulatorEventCreate(
                     machine_id=machine.code,
                     event_type="digital_input_changed",
-                    timestamp=now - timedelta(milliseconds=max(machine.debounce_ms + 100, 500)),
+                    timestamp=current_event_time - timedelta(milliseconds=max(machine.debounce_ms + 100, 500)),
                     input_name="cycle_signal",
                     input_value=previous_value,
                 ),
                 SimulatorEventCreate(
                     machine_id=machine.code,
                     event_type="digital_input_changed",
-                    timestamp=now,
+                    timestamp=current_event_time,
                     input_name="cycle_signal",
                     input_value=current_value,
                     cycle_time_sec=cycle_time_sec,

backend/tests/test_events.py

@@ -195,3 +195,23 @@ def test_simulator_debounce_noise_is_ignored(db_session: Session) -> None:
     assert result["scenario"] == "debounce_noise"
     assert len(result["events"]) == 2
     assert cycles == []
+
+
+def test_simulator_passive_edge_uses_requested_real_cycle_time(db_session: Session) -> None:
+    machine = seed_running_machine(db_session)
+    machine.last_cycle_at = datetime(2026, 6, 14, 8, 0, tzinfo=timezone.utc)
+    db_session.commit()
+
+    result = run_simulator_scenario(
+        SimulatorScenarioCreate(
+            machine_id=machine.code,
+            scenario="cycle_signal_edge",
+            cycle_time_sec=12,
+        ),
+        db_session,
+    )
+
+    cycle = db_session.execute(select(Cycle).where(Cycle.machine_id == machine.id)).scalar_one()
+    assert result["scenario"] == "cycle_signal_edge"
+    assert len(result["events"]) == 2
+    assert cycle.cycle_time_sec == 12

frontend/src/App.tsx

@@ -39,6 +39,7 @@ function FieldLabel({ label, error, children }: { label: string; error?: ReactNo
 }
 
 export default function App() {
+  const [showSplash, setShowSplash] = useState(true);
   const [dashboard, setDashboard] = useState<DashboardSnapshot | null>(null);
   const [orders, setOrders] = useState<ProductionOrder[]>([]);
   const [unqualifiedDowntimes, setUnqualifiedDowntimes] = useState<Downtime[]>([]);
@@ -77,6 +78,11 @@ export default function App() {
     return language === "fr" ? fr : en;
   }
 
+  useEffect(() => {
+    const timer = window.setTimeout(() => setShowSplash(false), 900);
+    return () => window.clearTimeout(timer);
+  }, []);
+
   const moduleTabs: Array<{ key: ModuleKey; label: string; description: string }> = [
     { key: "atelier", label: t("Workshop", "Atelier"), description: t("Machines view", "Vue machines") },
     { key: "machine", label: "Machine", description: t("Cycles and events", "Cycles et evenements") },
@@ -1118,14 +1124,35 @@ export default function App() {
     );
   }
 
+  if (showSplash) {
+    return (
+      <div className="splash-screen" aria-label="Plast Track">
+        <img src="/KSS.png" alt="KSS" />
+      </div>
+    );
+  }
+
   return (
     <div className={`app-shell ${isWorkshopMode && activeModule === "atelier" ? "app-shell--workshop" : ""}`}>
       <main className="workspace">
+        <aside className="demo-notice" role="note">
+          <strong>{t("Simulation and demonstration only", "Simulation et demonstration uniquement")}</strong>
+          <span>
+            {t(
+              "This web application is for simulation and demonstration. It must not be used as a validated production MES or safety system.",
+              "Cette application web est destinee a la simulation et a la demonstration. Elle ne doit pas etre utilisee comme MES de production valide ni comme systeme de securite.",
+            )}
+          </span>
+        </aside>
+
         <header className="hero">
+          <div className="brand-lockup">
+            <img className="brand-lockup__logo" src="/KSS.png" alt="KSS" />
             <div>
               <p className="eyebrow">Plast Track MVP</p>
               <h1>{t("Workshop supervision", "Supervision atelier")}</h1>
             </div>
+          </div>
           <div className="hero__controls">
             <label className="language-select">
               <span>{t("Language", "Langue")}</span>

frontend/src/styles.css

@@ -47,6 +47,19 @@ body {
   background: var(--bg-base);
 }
 
+.splash-screen {
+  display: grid;
+  min-height: 100vh;
+  place-items: center;
+  background: #FFFFFF;
+}
+
+.splash-screen img {
+  width: min(220px, 58vw);
+  height: auto;
+  animation: splash-enter 420ms ease both;
+}
+
 button,
 input,
 select,
@@ -71,6 +84,7 @@ button:disabled {
   padding: 12px;
 }
 
+.app-shell--workshop .demo-notice,
 .app-shell--workshop .hero,
 .app-shell--workshop .summary-ribbon,
 .app-shell--workshop .module-tabs {
@@ -97,6 +111,30 @@ button:disabled {
   align-items: start;
 }
 
+.demo-notice {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 12px 14px;
+  border: 1px solid color-mix(in srgb, var(--accent) 46%, #FFFFFF);
+  border-radius: 12px;
+  background: var(--accent-light);
+  color: var(--text-primary);
+  box-shadow: 0 1px 3px rgba(10, 47, 90, 0.06), 0 4px 12px rgba(10, 47, 90, 0.04);
+}
+
+.demo-notice strong {
+  flex: 0 0 auto;
+  font-family: "Space Grotesk", sans-serif;
+  font-size: var(--text-base);
+}
+
+.demo-notice span {
+  color: var(--text-secondary);
+  font-size: var(--text-sm);
+  line-height: 1.45;
+}
+
 .hero,
 .panel,
 .machine-card,
@@ -115,6 +153,20 @@ button:disabled {
   padding: 20px;
 }
 
+.brand-lockup {
+  display: flex;
+  min-width: 0;
+  align-items: center;
+  gap: 16px;
+}
+
+.brand-lockup__logo {
+  width: 74px;
+  max-height: 58px;
+  flex: 0 0 auto;
+  object-fit: contain;
+}
+
 .hero h1 {
   margin: 0;
   font-family: "Space Grotesk", sans-serif;
@@ -1066,6 +1118,8 @@ tr.is-selected-row td {
   }
 
   .hero,
+  .demo-notice,
+  .brand-lockup,
   .hero__controls,
   .machine-card__top,
   .machine-card__hero,
@@ -1080,6 +1134,10 @@ tr.is-selected-row td {
     justify-items: start;
   }
 
+  .brand-lockup__logo {
+    width: 64px;
+  }
+
   .panel-actions {
     justify-content: stretch;
   }
@@ -1105,6 +1163,18 @@ tr.is-selected-row td {
   }
 }
 
+@keyframes splash-enter {
+  from {
+    opacity: 0;
+    transform: translateY(8px) scale(0.98);
+  }
+
+  to {
+    opacity: 1;
+    transform: translateY(0) scale(1);
+  }
+}
+
 @media (prefers-reduced-motion: reduce) {
   *,
   *::before,

simulator-ui/src/main.tsx

@@ -120,6 +120,7 @@ function parseInputValue(value: string): boolean | number | string {
 }
 
 function App() {
+  const [showSplash, setShowSplash] = useState(true);
   const [language, setLanguage] = useState<Language>(() => {
     const savedLanguage = localStorage.getItem(LANGUAGE_STORAGE_KEY);
     return savedLanguage === "en" || savedLanguage === "fr" ? savedLanguage : "fr";
@@ -141,6 +142,11 @@ function App() {
     return value[language];
   }
 
+  useEffect(() => {
+    const timer = window.setTimeout(() => setShowSplash(false), 900);
+    return () => window.clearTimeout(timer);
+  }, []);
+
   useEffect(() => {
     apiRequest<Machine[]>("/api/machines")
       .then((items) => {
@@ -220,9 +226,19 @@ function App() {
   const selectedMachineInfo = machines.find((machine) => machine.code === selectedMachine);
   const machinePowerLabel = selectedMachineInfo?.powered_on ? t("Powered ON", "Sous tension") : t("Powered OFF", "Hors tension");
 
+  if (showSplash) {
+    return (
+      <main className="splash-screen" aria-label="Plast Track Simulator">
+        <img src="/KSS.png" alt="KSS" />
+      </main>
+    );
+  }
+
   return (
     <main className="shell">
       <section className="hero">
+        <div className="brand-lockup">
+          <img className="brand-lockup__logo" src="/KSS.png" alt="KSS" />
           <div>
             <p className="eyebrow">{t("Separate test console", "Console de test separee")}</p>
             <h1>{t("Passive Signal Simulator", "Simulateur signaux passifs")}</h1>
@@ -233,6 +249,7 @@ function App() {
               )}
             </p>
           </div>
+        </div>
         <div className="hero__side">
           <label className="language-select">
             <span>{t("Language", "Langue")}</span>
@@ -285,7 +302,7 @@ function App() {
 
           <div className="numeric-grid">
             <label className="field">
-              <span>{t("Cycle time sec", "Temps cycle sec")}</span>
+              <span>{t("Real cycle time sec", "Temps de cycle reel sec")}</span>
               <input
                 min="1"
                 step="0.1"

simulator-ui/src/styles.css

@@ -22,6 +22,19 @@ body {
   min-width: 320px;
 }
 
+.splash-screen {
+  display: grid;
+  min-height: 100vh;
+  place-items: center;
+  background: #ffffff;
+}
+
+.splash-screen img {
+  width: min(220px, 58vw);
+  height: auto;
+  animation: splash-enter 420ms ease both;
+}
+
 button,
 input,
 select {
@@ -54,6 +67,21 @@ button:disabled {
   max-width: 1280px;
 }
 
+.brand-lockup {
+  display: flex;
+  min-width: 0;
+  align-items: flex-start;
+  gap: 18px;
+}
+
+.brand-lockup__logo {
+  width: 82px;
+  max-height: 68px;
+  flex: 0 0 auto;
+  object-fit: contain;
+  margin-top: 4px;
+}
+
 .eyebrow {
   margin: 0 0 8px;
   color: var(--accent);
@@ -371,10 +399,20 @@ pre {
   }
 
   .hero,
+  .brand-lockup,
   .control-grid {
     grid-template-columns: 1fr;
   }
 
+  .brand-lockup {
+    display: grid;
+  }
+
+  .brand-lockup__logo {
+    width: 72px;
+    margin-top: 0;
+  }
+
   .connection-card {
     min-width: 0;
   }
@@ -384,6 +422,18 @@ pre {
   }
 }
 
+@keyframes splash-enter {
+  from {
+    opacity: 0;
+    transform: translateY(8px) scale(0.98);
+  }
+
+  to {
+    opacity: 1;
+    transform: translateY(0) scale(1);
+  }
+}
+
 @media (max-width: 620px) {
   .scenario-grid,
   .numeric-grid {