feat(map): 添加任务阶段名称的UI显示

在MissionComp中添加阶段名称映射表，并在阶段切换时更新UI显示。

assets/script/game/map/MissionComp.ts

@@ -100,6 +100,18 @@ export class MissionComp extends CCComp {
     @property(Node)
     time_node:Node = null!
 
+    /** 阶段名称映射表（用于 UI 显示） */
+    private static readonly PhaseNameMap: Record<MissionPhase, string> = {
+        [MissionPhase.None]: "未开始",
+        [MissionPhase.PrepareStart]: "准备开始",
+        [MissionPhase.Prepare]: "准备阶段",
+        [MissionPhase.PrepareEnd]: "准备结束",
+        [MissionPhase.BattleStart]: "战斗开始",
+        [MissionPhase.Battle]: "战斗中",
+        [MissionPhase.BattleEnd]: "战斗结束",
+        [MissionPhase.Settle]: "结算阶段"
+    };
+
     // ======================== 运行时状态 ========================
 
     /** 战斗倒计时（秒） */
@@ -279,6 +291,17 @@ export class MissionComp extends CCComp {
         const oldPhase = this.currentPhase;
         this.currentPhase = targetPhase;
 
+        // 更新阶段显示 UI
+        if (this.time_node && this.time_node.isValid) {
+            const phaseNode = this.time_node.getChildByPath("Phase/Label");
+            if (phaseNode) {
+                const label = phaseNode.getComponent(Label);
+                if (label) {
+                    label.string = MissionComp.PhaseNameMap[targetPhase] || "未知";
+                }
+            }
+        }
+
         // 重置状态机的计时器
         this.PhaseTime.reset();