fix: dialogue system race condition + null safety

- CampaignManager: subscribe OnDialogueComplete BEFORE StartDialogue
  (prevents game getting stuck in Dialogue state when dialogue not found)
- DialogueUI: null checks for _dialoguePanel, _continueIndicator,
  _speakerNameText, _speakerPortrait, _continueIndicator in coroutines
- DialogueUI: fix Update fallback — check action != null before skipping
  keyboard/mouse input

Assets/Game/Scripts/Mono/Core/CampaignManager.cs

@@ -359,19 +359,22 @@ public class CampaignManager : MonoBehaviour
     {
         Debug.Log($"[CampaignManager] Diálogo intro: {chapter.introDialogueId}");
         
-        if (GameStateManager.Instance != null)
-            GameStateManager.Instance.TransitionTo(GameState.Dialogue);
-        
         if (DialogueSystem.Instance != null)
         {
-            DialogueSystem.Instance.StartDialogue(chapter.introDialogueId);
+            // Subscribe BEFORE starting — StartDialogue can fire OnDialogueComplete immediately
+            // if dialogue is not found, which would skip the transition.
             DialogueSystem.Instance.OnDialogueComplete += OnIntroDialogueComplete;
+            DialogueSystem.Instance.StartDialogue(chapter.introDialogueId);
         }
         else
         {
             Debug.LogWarning("[CampaignManager] DialogueSystem no disponible. Saltando intro.");
             TransitionToPlaying();
+            return;
         }
+        
+        if (GameStateManager.Instance != null)
+            GameStateManager.Instance.TransitionTo(GameState.Dialogue);
     }
     
     private void OnIntroDialogueComplete()
@@ -396,19 +399,21 @@ public class CampaignManager : MonoBehaviour
         
         Debug.Log($"[CampaignManager] Diálogo outro: {CurrentChapter.outroDialogueId}");
         
-        if (GameStateManager.Instance != null)
-            GameStateManager.Instance.TransitionTo(GameState.Dialogue);
-        
         if (DialogueSystem.Instance != null)
         {
-            DialogueSystem.Instance.StartDialogue(CurrentChapter.outroDialogueId);
+            // Subscribe BEFORE starting — same fix as intro.
             DialogueSystem.Instance.OnDialogueComplete += OnOutroDialogueComplete;
+            DialogueSystem.Instance.StartDialogue(CurrentChapter.outroDialogueId);
         }
         else
         {
             Debug.LogWarning("[CampaignManager] DialogueSystem no disponible. Saltando outro.");
             CompleteChapter();
+            return;
         }
+        
+        if (GameStateManager.Instance != null)
+            GameStateManager.Instance.TransitionTo(GameState.Dialogue);
     }
     
     private void OnOutroDialogueComplete()

Assets/Game/Scripts/Mono/UI/DialogueUI.cs

@@ -30,9 +30,11 @@ public class DialogueUI : MonoBehaviour
     
     void Update()
     {
-        // Fallback: Space, Enter o clic izquierdo cuando no hay InputAction asignada
         if (!_isInputEnabled) return;
-        if (_advanceDialogueAction != null) return; // el InputAction ya maneja esto
+        
+        // If InputAction is configured, it handles input via OnAdvanceDialogueInput callback.
+        // Otherwise, fall back to keyboard/mouse.
+        if (_advanceDialogueAction != null && _advanceDialogueAction.action != null) return;
         
         if (Input.GetKeyDown(KeyCode.Space) || Input.GetKeyDown(KeyCode.Return) || Input.GetMouseButtonDown(0))
         {
@@ -126,11 +128,11 @@ public class DialogueUI : MonoBehaviour
     /// </summary>
     private void OnNodeDisplayed(DialogueNode node)
     {
-        _dialoguePanel.SetActive(true);
-        _continueIndicator.SetActive(false);
+        if (_dialoguePanel != null)
+            _dialoguePanel.SetActive(true);
+        if (_continueIndicator != null)
+            _continueIndicator.SetActive(false);
         _isInputEnabled = true;
-        
-        // El texto se actualiza mediante OnTextUpdated durante el typewriter
     }
     
     /// <summary>
@@ -149,10 +151,9 @@ public class DialogueUI : MonoBehaviour
     /// </summary>
     private void OnNodeComplete(DialogueNode node)
     {
-        // Typewriter terminó, mostrar indicador
-        _continueIndicator.SetActive(true);
+        if (_continueIndicator != null)
+            _continueIndicator.SetActive(true);
         
-        // Iniciar parpadeo del indicador
         if (_blinkCoroutine != null)
         {
             StopCoroutine(_blinkCoroutine);
@@ -165,7 +166,8 @@ public class DialogueUI : MonoBehaviour
     /// </summary>
     private void OnDialogueComplete()
     {
-        _dialoguePanel.SetActive(false);
+        if (_dialoguePanel != null)
+            _dialoguePanel.SetActive(false);
         _isInputEnabled = false;
         
         if (_blinkCoroutine != null)
@@ -212,9 +214,11 @@ public class DialogueUI : MonoBehaviour
     {
         while (true)
         {
-            _continueIndicator.SetActive(true);
+            if (_continueIndicator != null)
+                _continueIndicator.SetActive(true);
             yield return new WaitForSecondsRealtime(_blinkSpeed);
-            _continueIndicator.SetActive(false);
+            if (_continueIndicator != null)
+                _continueIndicator.SetActive(false);
             yield return new WaitForSecondsRealtime(_blinkSpeed);
         }
     }