Fix camera zone lock bounds

game/docs/planning/game_architecture_board.md

@@ -178,7 +178,7 @@ mindmap
 
 - `scene/whitebox_scene.*`
 - `scene/camera_controller.*`：玩家跟随、dead zone、平滑和世界边界 clamp。
-- `CameraZoneLock`：玩家进入 battle zone 后摄像机锁定到 zone camera bounds，当前用 `F2` debug 清场解锁。
+- `CameraZoneLock`：玩家进入 battle zone 后摄像机锁定到 zone camera bounds，锁定范围会防御性保证不小于视口，当前用 `F2` 或离开 zone 做 debug 清场解锁。
 
 下一步：
 

game/docs/planning/scene_build_plan.md

@@ -23,6 +23,7 @@
 - `WhiteboxScene` 已支持 `F1` 切换 debug overlay。
 - `CameraController` 已接入：修复场景 `OnUpdate()` 不被调用导致摄像机不动的问题，并提供跟随、dead zone、平滑和世界边界 clamp。
 - `CameraZoneLock` 已接入：玩家进入 battle zone 后摄像机临时锁定到 zone camera bounds，`F2` 临时清场并恢复全关卡跟随。
+- 已修复 zone camera bounds 小于 1280 视口导致摄像机锁死的问题；所有锁镜头范围必须不小于当前视口，debug 阶段玩家离开 zone 会自动清场解锁。
 
 ## 2. 第一关场景目标
 

game/src/data/whitebox_level.cpp

@@ -112,17 +112,17 @@ LevelDefinition CreateWhiteboxLevel() {
   level.battleZones = {
       {"zone_01_intro",
        frostbite2D::Rect(520.0f, 260.0f, 560.0f, 340.0f),
-       frostbite2D::Rect(320.0f, 0.0f, 760.0f, 720.0f),
+       frostbite2D::Rect(320.0f, 0.0f, 1280.0f, 720.0f),
        {{"zone_01_enemy_a", frostbite2D::Vec2(760.0f, 560.0f)},
         {"zone_01_enemy_b", frostbite2D::Vec2(980.0f, 560.0f)}}},
       {"zone_02_platform",
        frostbite2D::Rect(1420.0f, 250.0f, 680.0f, 350.0f),
-       frostbite2D::Rect(1280.0f, 0.0f, 900.0f, 720.0f),
+       frostbite2D::Rect(1280.0f, 0.0f, 1280.0f, 720.0f),
        {{"zone_02_enemy_a", frostbite2D::Vec2(1620.0f, 560.0f)},
         {"zone_02_enemy_b", frostbite2D::Vec2(1900.0f, 560.0f)}}},
       {"zone_03_exit",
        frostbite2D::Rect(2380.0f, 250.0f, 720.0f, 350.0f),
-       frostbite2D::Rect(2240.0f, 0.0f, 960.0f, 720.0f),
+       frostbite2D::Rect(1920.0f, 0.0f, 1280.0f, 720.0f),
        {{"zone_03_enemy_a", frostbite2D::Vec2(2580.0f, 560.0f)},
         {"zone_03_enemy_b", frostbite2D::Vec2(2860.0f, 560.0f)}}},
   };

game/src/scene/camera_controller.cpp

@@ -28,7 +28,10 @@ void CameraController::Configure(const CameraControllerConfig& config) {
 }
 
 void CameraController::SetWorldBounds(const frostbite2D::Rect& worldBounds) {
-  config_.worldBounds = worldBounds;
+  const float width = std::max(worldBounds.width(), config_.viewportWidth);
+  const float height = std::max(worldBounds.height(), config_.viewportHeight);
+  config_.worldBounds =
+      frostbite2D::Rect(worldBounds.left(), worldBounds.top(), width, height);
 }
 
 void CameraController::SnapToTarget(frostbite2D::Camera& camera,

game/src/scene/whitebox_scene.cpp

@@ -127,11 +127,16 @@ void WhiteboxScene::updateBattleZones() {
     return;
   }
 
+  const frostbite2D::Rect playerBounds = player_->GetWorldBounds();
   if (activeBattleZoneIndex_ >= 0) {
+    const size_t activeIndex = static_cast<size_t>(activeBattleZoneIndex_);
+    if (activeIndex < level_.battleZones.size() &&
+        !level_.battleZones[activeIndex].trigger.intersects(playerBounds)) {
+      clearActiveBattleZone();
+    }
     return;
   }
 
-  const frostbite2D::Rect playerBounds = player_->GetWorldBounds();
   for (size_t i = 0; i < level_.battleZones.size(); ++i) {
     BattleZoneRuntime& runtime = battleZoneStates_[i];
     if (runtime.cleared ||