feat(share): 容器接线 ShareGuideDialog（订阅 SHOW_GUIDE/渲染/返回键/一次性回投，分享重构 §7）

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

entry/src/main/ets/pages/BridgeGameContainer.ets

@@ -6,10 +6,11 @@ import { ConfigManager, ResourceManager, AppDataInjector, AppDataValues, RemoteC
 import { KvStore, LocalUploadServer } from 'platform';
 import { OutboundHandlers } from 'contracts';
 import { AppEnv, EventBus, EventPayload, NavEvents, OpenGenericWebPayload, SwitchGamePayload,
-  BackGamePayload, ShareEvents, SharePanelRequest, SharePanelResult, Logger } from 'common';
+  BackGamePayload, ShareEvents, SharePanelRequest, SharePanelResult, ShareGuideRequest, ShareGuideResult, Logger } from 'common';
 import { BridgeGameParams, GenericWebParams, GenericWebResult, RouteName, AppEvents } from '../routes/AppRoutes';
 import { WebSlot } from '../web/WebSlot';
 import { SharePanel } from '../components/SharePanel';
+import { ShareGuideDialog } from '../components/ShareGuideDialog';
 import { KEY_SPLASH_VISIBLE } from './Index';
 
 /**
@@ -52,6 +53,12 @@ export struct BridgeGameContainer {
   @State private sharePanelVisible: boolean = false;
   /** 当前分享面板的一次性回投事件名（用户选定平台后 emit 回 ShareProvider）。 */
   private shareResultEvent: string = '';
+  /** 分享指引窗显隐（渠道选定后叠在 Stack 顶层）。 */
+  @State private shareGuideVisible: boolean = false;
+  private shareGuidePlatform: string = '';
+  private shareGuideKind: string = '';
+  /** 当前指引窗的一次性回投事件名（用户选动作后 emit 回 ShareProvider）。 */
+  private shareGuideResultEvent: string = '';
 
   aboutToAppear(): void {
     if (AppEnv.isDebug()) {
@@ -120,6 +127,7 @@ export struct BridgeGameContainer {
     this.cancels.push(EventBus.on(NavEvents.SWITCH_GAME, (p?: EventPayload) => this.switchGame(p)));
     this.cancels.push(EventBus.on(NavEvents.BACK_GAME, (p?: EventPayload) => this.backToLobby(p)));
     this.cancels.push(EventBus.on(ShareEvents.SHOW_PANEL, (p?: EventPayload) => this.showSharePanel(p)));
+    this.cancels.push(EventBus.on(ShareEvents.SHOW_GUIDE, (p?: EventPayload) => this.showShareGuide(p)));
   }
 
   /** 收到 ShareProvider 的 SHOW_PANEL：记下一次性回投事件名并弹出面板。 */
@@ -147,6 +155,33 @@ export struct BridgeGameContainer {
     }
   }
 
+  /** 收到 ShareProvider 的 SHOW_GUIDE：记下渠道/类型/一次性回投事件名并弹出指引窗。 */
+  private showShareGuide(p?: EventPayload): void {
+    if (p === undefined) {
+      return;
+    }
+    // 已有指引窗未关闭：先按取消回投旧请求，避免上一个 once 永不触发致 ShareProvider 悬挂。
+    if (this.shareGuideVisible && this.shareGuideResultEvent !== '') {
+      this.emitShareGuideResult('cancel');
+    }
+    const req = p as ShareGuideRequest;
+    this.shareGuidePlatform = req.platform;
+    this.shareGuideKind = req.contentKind;
+    this.shareGuideResultEvent = req.resultEvent;
+    this.shareGuideVisible = true;
+  }
+
+  /** 用户选定动作/取消：回投并关闭指引窗。 */
+  private emitShareGuideResult(action: string): void {
+    const ev: string = this.shareGuideResultEvent;
+    this.shareGuideResultEvent = '';
+    this.shareGuideVisible = false;
+    if (ev !== '') {
+      const result: ShareGuideResult = { action };
+      EventBus.emit(ev, result);
+    }
+  }
+
   /** 路径 B：打开通用网页容器；关闭回传 → 当前激活槽 callHandler('getWebdata')。 */
   private openGenericWeb(p?: EventPayload): void {
     if (p === undefined) {
@@ -390,6 +425,14 @@ export struct BridgeGameContainer {
         if (this.sharePanelVisible) {
           SharePanel({ onPick: (platform: string) => this.emitShareResult(platform) })
         }
+        // 分享指引窗（顶层叠加；渠道选定后弹，选动作/取消 → 一次性回投 ShareProvider）
+        if (this.shareGuideVisible) {
+          ShareGuideDialog({
+            platform: this.shareGuidePlatform,
+            contentKind: this.shareGuideKind,
+            onPick: (action: string) => this.emitShareGuideResult(action),
+          })
+        }
       }
       .width('100%').height('100%')
       // 垫白底：Web 首帧前/页面切换间隙显白色（与启动页白底无缝），避免黑屏闪烁
@@ -397,6 +440,11 @@ export struct BridgeGameContainer {
     }
     .hideTitleBar(true)
     .onBackPressed(() => {
+      // 指引窗打开时，返回键关闭并按取消回投
+      if (this.shareGuideVisible) {
+        this.emitShareGuideResult('cancel');
+        return true;
+      }
       // 分享面板打开时，返回键关闭面板并按取消回投（对齐 Android 点空白关闭）
       if (this.sharePanelVisible) {
         this.emitShareResult('cancel');