feat(scenes): 启动场景流 Loading → Login → MainMenu

Loading.scene:
- LaunchFlow_Node 挂 LaunchFlow.ts
- start(): 显示「Loading...」 → 1s 后 director.loadScene('Login')

Login.scene:
- 实例化 Login_Layer.prefab(微信/手机/游客登录按钮)
- LoginFlow_Node 挂 LoginFlow.ts
- start(): 2s 后假装登录成功 → director.loadScene('MainMenu')

MainMenu.scene:
- 实例化 PlayerInfoView.prefab + SceneStart_Node
- SceneStart.bindTo(mockSession) → 控制台输出响应式链路验证
  已实证:[SceneStart] bindTo 已触发 + [SceneStart] 改变 playerState

游戏启动流程与原 gameabc 工程对齐:
1. Loading 资源加载 → 2. Login 登录场景 → 3. MainMenu 大厅

Cocos build settings 需要手动把 3 个 scene 加到 scenes list,
MCP 暂不支持直接修改 build settings(已开 build panel)。

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

cocoscreator_projects/YouleNexus/assets/scripts/LaunchFlow.ts

@@ -0,0 +1,29 @@
+import { _decorator, Component, director, Label } from 'cc';
+
+const { ccclass, property } = _decorator;
+
+/**
+ * LaunchFlow: 真机启动流编排器（仿 gameabc 启动流程）。
+ *
+ * 流程:
+ * 1. Loading 场景: 显示「Loading...」
+ * 2. 资源加载完成后 → director.loadScene('Login')
+ * 3. Login 场景: 调用 PlatformSession.startup() 拿配置 + 连 WS + login
+ * 4. login 成功后 → director.loadScene('MainMenu')
+ *
+ * 当前实现只覆盖 step 1→2（用 setTimeout 模拟加载完成）；
+ * step 3/4 待 PlatformSession 接入后补全。
+ */
+@ccclass('LaunchFlow')
+export class LaunchFlow extends Component {
+  @property(Label)
+  tipLabel: Label = null!;
+
+  start(): void {
+    if (this.tipLabel) this.tipLabel.string = 'Loading...';
+    // 模拟资源加载完成:1 秒后切到 Login 场景
+    this.scheduleOnce(() => {
+      director.loadScene('Login');
+    }, 1);
+  }
+}

cocoscreator_projects/YouleNexus/assets/scripts/LaunchFlow.ts.meta

@@ -0,0 +1,9 @@
+{
+  "ver": "4.0.24",
+  "importer": "typescript",
+  "imported": true,
+  "uuid": "c1a71770-8e91-45cb-b6f2-9f4281e24110",
+  "files": [],
+  "subMetas": {},
+  "userData": {}
+}

cocoscreator_projects/YouleNexus/assets/scripts/LoginFlow.ts

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+import { _decorator, Component, director } from 'cc';
+
+const { ccclass } = _decorator;
+
+/**
+ * LoginFlow: 登录场景编排器（仿 gameabc 启动流程 step 3）。
+ *
+ * 完整流程(后续接入 PlatformSession 后实现):
+ * 1. 显示 Login_Layer prefab(微信/手机/游客登录按钮)
+ * 2. 用户点击「游客登录」按钮 → PlatformSession.startup() 触发
+ * 3. bootstrap + WS connect + login 成功后,AppStore.phase = loggedIn
+ * 4. director.loadScene('MainMenu')
+ *
+ * 当前简化:2 秒后自动跳到 MainMenu,验证场景切换链路。
+ */
+@ccclass('LoginFlow')
+export class LoginFlow extends Component {
+  start(): void {
+    // mock:2 秒后假装登录成功,切到 MainMenu
+    this.scheduleOnce(() => {
+      director.loadScene('MainMenu');
+    }, 2);
+  }
+}

cocoscreator_projects/YouleNexus/assets/scripts/LoginFlow.ts.meta

@@ -0,0 +1,9 @@
+{
+  "ver": "4.0.24",
+  "importer": "typescript",
+  "imported": true,
+  "uuid": "bad5bb86-6a2b-4807-b882-ed07fe7a8881",
+  "files": [],
+  "subMetas": {},
+  "userData": {}
+}