fix(mission): 修复回合开始前未选英雄直接开战的问题

调整关卡战斗阶段切换逻辑，新增MissionPhase.Battle相位守卫，避免未选择英雄就自动进入战斗导致玩家判负；同时调整mission.prefab的UI布局参数适配新逻辑

assets/resources/gui/element/mission.prefab

@@ -3131,7 +3131,7 @@
     "_lpos": {
       "__type__": "cc.Vec3",
       "x": 0,
-      "y": 589.929,
+      "y": 902.919,
       "z": 0
     },
     "_lrot": {
@@ -3588,7 +3588,7 @@
     "_lpos": {
       "__type__": "cc.Vec3",
       "x": 0,
-      "y": 331.679,
+      "y": 644.669,
       "z": 0
     },
     "_lrot": {
@@ -3661,7 +3661,7 @@
     "_top": 535,
     "_bottom": 645,
     "_horizontalCenter": 0,
-    "_verticalCenter": -308.321,
+    "_verticalCenter": 4.668999999999983,
     "_isAbsLeft": true,
     "_isAbsRight": true,
     "_isAbsTop": true,
@@ -3766,7 +3766,7 @@
     "_lpos": {
       "__type__": "cc.Vec3",
       "x": 0,
-      "y": 70.17200000000003,
+      "y": 383.162,
       "z": 0
     },
     "_lrot": {
@@ -4620,7 +4620,7 @@
     "_top": 340.279,
     "_bottom": -521.315,
     "_horizontalCenter": 0,
-    "_verticalCenter": -569.828,
+    "_verticalCenter": -256.838,
     "_isAbsLeft": true,
     "_isAbsRight": true,
     "_isAbsTop": true,
@@ -5384,8 +5384,8 @@
     },
     "_lpos": {
       "__type__": "cc.Vec3",
-      "x": 230,
-      "y": 1110,
+      "x": 0,
+      "y": 980,
       "z": 0
     },
     "_lrot": {
@@ -6711,11 +6711,11 @@
     "__prefab": {
       "__id__": 320
     },
-    "_alignFlags": 33,
+    "_alignFlags": 17,
     "_target": null,
     "_left": 310,
     "_right": 30,
-    "_top": 20,
+    "_top": 150,
     "_bottom": 638.669,
     "_horizontalCenter": 0,
     "_verticalCenter": 0,
@@ -6868,7 +6868,6 @@
     "time_label": {
       "__id__": 305
     },
-    "phase_label": null,
     "tooltip": {
       "__id__": 240
     },

assets/script/game/map/MissionComp.ts

@@ -995,8 +995,11 @@ export class MissionComp extends CCComp {
 
         this.isBossWave = true;   // 单场 Boss 战，恒为 Boss 战（超时阈值/预警走 Boss 档）
 
-        if (wave > 1) {
-            // 在新一回合到来时，先进入 BattleEnd，2秒后自动进入下一回合的准备阶段
+        if (wave > 1 && this.currentPhase === MissionPhase.Battle) {
+            // 战斗中回合更迭：先进入 BattleEnd，2秒后自动进入下一回合的准备阶段。
+            // Why: NewWave 现在仅在 SectionStart（Prepare 阶段，等待三选一）时派发，
+            //      不加相位守卫会把"下一节/再来一次"从 Prepare 强切 BattleEnd，
+            //      导致玩家还没选英雄就自动开战，场上无英雄直接判负
             this.changePhase(MissionPhase.BattleEnd);
         } else {
             // 第1回合不需要结束上一回合，延迟一点播放提示，避免被开始游戏的loading遮挡