fix dead screen

backend/internal/game/engine.go

@@ -1565,8 +1565,15 @@ func (e *Engine) processMovementTick(now time.Time) {
 	}
 
 	for heroID, hm := range e.movements {
+		if hm == nil {
+			continue
+		}
+		// Do not run movement FSM, AdvanceTick, or encounters for dead heroes.
+		if hm.skipMovementSimulation() {
+			continue
+		}
 		ProcessSingleHeroMovementTick(heroID, hm, e.roadGraph, now, e.sender, startCombat, nil, e.adventureLog, e.persistHeroAfterTownEnter, nil)
-		if e.heroStore == nil || hm == nil || hm.Hero == nil {
+		if e.heroStore == nil || hm.Hero == nil {
 			continue
 		}
 		if sig, ok := hm.TownPausePersistDue(); ok {
@@ -1701,6 +1708,9 @@ func (e *Engine) processPositionSync(now time.Time) {
 		if hm == nil {
 			continue
 		}
+		if hm.skipMovementSimulation() {
+			continue
+		}
 		if sender != nil && hm.State == model.StateWalking {
 			sender.SendToHero(heroID, "position_sync", hm.PositionSyncPayload(now))
 		}

backend/internal/game/movement.go

@@ -546,6 +546,9 @@ func (hm *HeroMovement) refreshSpeed(now time.Time) {
 // AdvanceTick moves the hero along the road for one movement tick.
 // Returns true if the hero reached the destination town this tick.
 func (hm *HeroMovement) AdvanceTick(now time.Time, graph *RoadGraph) (reachedTown bool) {
+	if hm.skipMovementSimulation() {
+		return false
+	}
 	if hm.Road == nil || len(hm.Road.Waypoints) < 2 {
 		return false
 	}
@@ -1033,6 +1036,36 @@ func (hm *HeroMovement) Die() {
 	hm.State = model.StateDead
 }
 
+// canSimulateMovement is true when the hero may advance along roads, towns, rests, and encounters.
+// Dead heroes must not run the movement FSM or AdvanceTick.
+func (hm *HeroMovement) canSimulateMovement() bool {
+	if hm == nil || hm.Hero == nil {
+		return false
+	}
+	if hm.State == model.StateDead {
+		return false
+	}
+	if hm.Hero.HP <= 0 || hm.Hero.State == model.StateDead {
+		return false
+	}
+	return true
+}
+
+// skipMovementSimulation returns true if the hero must not run movement this step.
+// When the model is dead but FSM is not yet StateDead, aligns with Die().
+func (hm *HeroMovement) skipMovementSimulation() bool {
+	if hm == nil {
+		return true
+	}
+	if hm.canSimulateMovement() {
+		return false
+	}
+	if hm.Hero != nil && (hm.Hero.HP <= 0 || hm.Hero.State == model.StateDead) {
+		hm.Die()
+	}
+	return true
+}
+
 // worldPositionAt returns hero world (x,y) matching SyncToHero / hero_move (spine + display offset).
 func (hm *HeroMovement) worldPositionAt(now time.Time) (x, y float64) {
 	if hm == nil || hm.Hero == nil {
@@ -1751,6 +1784,10 @@ func ProcessSingleHeroMovementTick(
 		return
 	}
 
+	if hm.skipMovementSimulation() {
+		return
+	}
+
 	switch hm.State {
 	case model.StateFighting, model.StateDead:
 		return

backend/internal/game/rest_test.go

@@ -600,3 +600,22 @@ func TestLowHP_DoesNotStartRestWhileFighting(t *testing.T) {
 		t.Fatalf("expected no rest kind, got %s", hm.ActiveRestKind)
 	}
 }
+
+// TestProcessMovementTick_DeadHeroIgnoresWalkingFSM ensures HP 0 never runs the walking
+// tick (no hero_move) even if hm.State was incorrectly left as Walking.
+func TestProcessMovementTick_DeadHeroIgnoresWalkingFSM(t *testing.T) {
+	graph := testGraph()
+	hero := testHeroOnRoad(1, 0, 1000)
+	now := time.Now()
+	hm := NewHeroMovement(hero, graph, now)
+	if hm.State != model.StateDead {
+		t.Fatalf("NewHeroMovement should set dead for HP=0, got %s", hm.State)
+	}
+	hm.State = model.StateWalking // simulate FSM / snapshot desync
+
+	ProcessSingleHeroMovementTick(hero.ID, hm, graph, now.Add(time.Second), nil, nil, nil, nil, nil, nil)
+
+	if hm.State != model.StateDead {
+		t.Fatalf("expected StateDead after tick, got %s", hm.State)
+	}
+}

frontend/src/game/engine.ts

@@ -294,8 +294,12 @@ export class GameEngine {
       this._gameState.hero.position.y = y;
     }
 
-    // Sync phase from server state string
-    if (state === 'walking' && this._gameState.phase !== GamePhase.Fighting) {
+    // Sync phase from server state string (never clear Death or active combat)
+    if (
+      state === 'walking' &&
+      this._gameState.phase !== GamePhase.Fighting &&
+      this._gameState.phase !== GamePhase.Dead
+    ) {
       this._gameState = { ...this._gameState, phase: GamePhase.Walking };
       this._thoughtText = null;
     }
@@ -312,9 +316,11 @@ export class GameEngine {
     this._routeWaypoints = waypoints;
     this._heroSpeed = speed;
     this._syncWorldTerrainContext();
+    const hp = this._gameState.hero?.hp ?? 1;
+    const phase = hp <= 0 ? GamePhase.Dead : GamePhase.Walking;
     this._gameState = {
       ...this._gameState,
-      phase: GamePhase.Walking,
+      phase,
       routeWaypoints: waypoints.length >= 2 ? waypoints.map((p) => ({ x: p.x, y: p.y })) : null,
     };
     this._thoughtText = null;
@@ -371,16 +377,23 @@ export class GameEngine {
     const newX = hero.position.x || 0;
     const newY = hero.position.y || 0;
 
+    const activity = hero.serverActivityState?.toLowerCase();
+    const isDead = hero.hp <= 0 || activity === 'dead';
+
     this._gameState = {
       ...this._gameState,
       hero,
     };
 
-    const activity = hero.serverActivityState?.toLowerCase();
-    if (
-      this._gameState.phase !== GamePhase.Fighting &&
-      this._gameState.phase !== GamePhase.Dead
-    ) {
+    if (isDead) {
+      this._gameState = {
+        ...this._gameState,
+        phase: GamePhase.Dead,
+        enemy: null,
+        enemyOnScreenRight: undefined,
+      };
+      this._thoughtText = null;
+    } else if (this._gameState.phase !== GamePhase.Fighting) {
       if (activity === 'resting') {
         this._gameState = { ...this._gameState, phase: GamePhase.Resting };
         if (!this._thoughtText) this._showThought();
@@ -507,9 +520,11 @@ export class GameEngine {
    * Transitions back to walking phase.
    */
   applyCombatEnd(): void {
+    const hp = this._gameState.hero?.hp ?? 0;
+    const phase = hp <= 0 ? GamePhase.Dead : GamePhase.Walking;
     this._gameState = {
       ...this._gameState,
-      phase: GamePhase.Walking,
+      phase,
       enemy: null,
       enemyOnScreenRight: undefined,
     };