feat: P25 conditional routing, nextScene supports Choice[] with conditions

engine/core/Engine.ts

@@ -296,11 +296,26 @@ export class Engine {
         }
       )
     } else if (scene.nextScene) {
-      const next = this.sceneManager.getScene(scene.nextScene)
-      if (next) {
-        this.goToScene(next)
-      } else {
+      if (Array.isArray(scene.nextScene)) {
+        for (const route of scene.nextScene) {
+          if (!route.conditions || this.stateManager.evaluate(route.conditions)) {
+            const next = this.sceneManager.getScene(route.targetScene)
+            if (next) {
+              this.goToScene(next)
+            } else {
+              this.endGame()
+            }
+            return
+          }
+        }
         this.endGame()
+      } else {
+        const next = this.sceneManager.getScene(scene.nextScene)
+        if (next) {
+          this.goToScene(next)
+        } else {
+          this.endGame()
+        }
       }
     } else if (scene.hotspots?.length) {
       return

engine/core/SceneManager.ts

@@ -50,8 +50,13 @@ export class SceneManager {
       }
     }
 
-    if (scene.nextScene && !targets.includes(scene.nextScene)) {
-      targets.push(scene.nextScene)
+    if (scene.nextScene) {
+      const nextIds = Array.isArray(scene.nextScene)
+        ? scene.nextScene.map(r => r.targetScene)
+        : [scene.nextScene]
+      for (const id of nextIds) {
+        if (!targets.includes(id)) targets.push(id)
+      }
     }
 
     return targets

engine/types.ts

@@ -10,7 +10,7 @@ export interface SceneNode {
   choices?: Choice[]
   hotspots?: Hotspot[]
   qte?: QTEDefinition
-  nextScene?: string
+  nextScene?: string | Choice[]
   onEnter?: Effect[]
   loopStart?: number
   loopEnd?: number