diff --git a/server/backend/internal/app/app.go b/server/backend/internal/app/app.go
index 0d73925..5bb3f68 100644
--- a/server/backend/internal/app/app.go
+++ b/server/backend/internal/app/app.go
@@ -26,8 +26,9 @@ type App struct {
 	server        *http.Server
 	notifier      *mqttnotifier.Notifier
 	authStore     *store.AuthStore
-	scheduleStore *store.ScreenScheduleStore
-	screenStore   *store.ScreenStore
+	scheduleStore       *store.ScreenScheduleStore
+	globalOverrideStore *store.GlobalOverrideStore
+	screenStore         *store.ScreenStore
 	dbPool        *db.Pool // V7: für db.Close() im Shutdown
 	logger        *log.Logger
 }
@@ -62,6 +63,7 @@ func New() (*App, error) {
 	playlists := store.NewPlaylistStore(pool.Pool)
 	authStore := store.NewAuthStore(pool.Pool)
 	schedules := store.NewScreenScheduleStore(pool.Pool)
+	globalOverrides := store.NewGlobalOverrideStore(pool.Pool)
 
 	// Ensure admin user exists — generate a random password if none is configured.
 	adminPassword := cfg.AdminPassword
@@ -100,8 +102,9 @@ func New() (*App, error) {
 		AuthStore:       authStore,
 		Notifier:        notifier,
 		ScreenshotStore: ss,
-		ScheduleStore:   schedules,
-		Config:          cfg,
+		ScheduleStore:       schedules,
+		GlobalOverrideStore: globalOverrides,
+		Config:              cfg,
 		UploadDir:       cfg.UploadDir,
 		Logger:          logger,
 	})
@@ -111,8 +114,9 @@ func New() (*App, error) {
 		server:        &http.Server{Addr: cfg.HTTPAddress, Handler: handler},
 		notifier:      notifier,
 		authStore:     authStore,
-		scheduleStore: schedules,
-		screenStore:   screens,
+		scheduleStore:       schedules,
+		globalOverrideStore: globalOverrides,
+		screenStore:         screens,
 		dbPool:        pool, // V7: Referenz für Shutdown
 		logger:        logger,
 	}, nil
@@ -145,8 +149,8 @@ func (a *App) Run() error {
 	}()
 
 	// Display-Zeitplan-Scheduler
-	go scheduler.Run(ctx, a.scheduleStore, a.screenStore, a.notifier)
-	go scheduler.Reconcile(ctx, a.scheduleStore, a.screenStore, a.screenStore, a.notifier)
+	go scheduler.Run(ctx, a.scheduleStore, a.screenStore, a.globalOverrideStore, a.notifier)
+	go scheduler.Reconcile(ctx, a.scheduleStore, a.screenStore, a.screenStore, a.globalOverrideStore, a.notifier)
 
 	// W2: Signal-Handler für Graceful Shutdown.
 	sigCh := make(chan os.Signal, 1)
diff --git a/server/backend/internal/httpapi/router.go b/server/backend/internal/httpapi/router.go
index 753571e..4dac8c3 100644
--- a/server/backend/internal/httpapi/router.go
+++ b/server/backend/internal/httpapi/router.go
@@ -21,8 +21,9 @@ type RouterDeps struct {
 	AuthStore       *store.AuthStore
 	Notifier        *mqttnotifier.Notifier
 	ScreenshotStore *ScreenshotStore
-	ScheduleStore   *store.ScreenScheduleStore
-	Config          config.Config
+	ScheduleStore       *store.ScreenScheduleStore
+	GlobalOverrideStore *store.GlobalOverrideStore
+	Config              config.Config
 	UploadDir       string
 	Logger          *log.Logger
 }
@@ -192,6 +193,18 @@ func registerManageRoutes(mux *http.ServeMux, d RouterDeps) {
 	mux.Handle("POST /api/v1/screens/{screenSlug}/schedule",
 		authScreen(http.HandlerFunc(manage.HandleUpdateSchedule(d.ScreenStore, d.ScheduleStore))))
 
+	// ── Globaler Override ────────────────────────────────────────────────
+	mux.Handle("GET /api/v1/global-override",
+		authOnly(http.HandlerFunc(manage.HandleGetGlobalOverride(d.GlobalOverrideStore))))
+	mux.Handle("POST /api/v1/global-override",
+		authOnly(http.HandlerFunc(manage.HandleSetGlobalOverride(d.GlobalOverrideStore, d.ScreenStore, notifier))))
+	mux.Handle("DELETE /api/v1/global-override",
+		authOnly(http.HandlerFunc(manage.HandleDeleteGlobalOverride(d.GlobalOverrideStore))))
+
+	// ── Per-Screen Override ───────────────────────────────────────────────
+	mux.Handle("POST /api/v1/screens/{screenSlug}/override",
+		authScreen(http.HandlerFunc(manage.HandleSetScreenOverride(d.ScreenStore, d.ScheduleStore))))
+
 	// ── JSON API — screens ────────────────────────────────────────────────
 	// Self-registration: no auth (player calls this on startup).
 	mux.HandleFunc("POST /api/v1/screens/register",