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frontend/src/store/eventBus.ts

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+/**
+ * 事件总线 - 用于跨组件/页面的数据同步通信
+ * 
+ * 使用方式：
+ * - eventBus.on('eventName', callback) - 监听事件
+ * - eventBus.off('eventName', callback) - 取消监听
+ * - eventBus.emit('eventName', data) - 触发事件
+ * - eventBus.once('eventName', callback) - 一次性监听
+ */
+
+type EventCallback = (data?: unknown) => void;
+
+class EventBus {
+  private events: Map<string, EventCallback[]> = new Map();
+
+  /**
+   * 监听事件
+   */
+  on(event: string, callback: EventCallback): void {
+    if (!this.events.has(event)) {
+      this.events.set(event, []);
+    }
+    this.events.get(event)!.push(callback);
+  }
+
+  /**
+   * 取消监听事件
+   */
+  off(event: string, callback: EventCallback): void {
+    const callbacks = this.events.get(event);
+    if (callbacks) {
+      const index = callbacks.indexOf(callback);
+      if (index > -1) {
+        callbacks.splice(index, 1);
+      }
+    }
+  }
+
+  /**
+   * 触发事件
+   */
+  emit(event: string, data?: unknown): void {
+    const callbacks = this.events.get(event);
+    if (callbacks) {
+      callbacks.forEach(cb => {
+        try {
+          cb(data);
+        } catch (error) {
+          console.error(`事件处理器执行失败 [${event}]:`, error);
+        }
+      });
+    }
+  }
+
+  /**
+   * 一次性监听事件
+   */
+  once(event: string, callback: EventCallback): void {
+    const onceCallback: EventCallback = (data) => {
+      callback(data);
+      this.off(event, onceCallback);
+    };
+    this.on(event, onceCallback);
+  }
+
+  /**
+   * 移除某个事件的所有监听器
+   */
+  removeAllListeners(event?: string): void {
+    if (event) {
+      this.events.delete(event);
+    } else {
+      this.events.clear();
+    }
+  }
+
+  /**
+   * 获取事件的监听器数量
+   */
+  listenerCount(event: string): number {
+    return this.events.get(event)?.length || 0;
+  }
+}
+
+// 导出单例
+export const eventBus = new EventBus();
+
+// 导出事件名称常量，避免字符串拼写错误
+export const EventNames = {
+  // 项目相关事件
+  PROJECT_CREATED: 'project:created',
+  PROJECT_UPDATED: 'project:updated',
+  PROJECT_DELETED: 'project:deleted',
+  PROJECT_NEEDS_REFRESH: 'project:needsRefresh',
+
+  // 角色相关事件
+  CHARACTER_CREATED: 'character:created',
+  CHARACTER_UPDATED: 'character:updated',
+  CHARACTER_DELETED: 'character:deleted',
+  CHARACTER_NEEDS_REFRESH: 'character:needsRefresh',
+
+  // 大纲相关事件
+  OUTLINE_CREATED: 'outline:created',
+  OUTLINE_UPDATED: 'outline:updated',
+  OUTLINE_DELETED: 'outline:deleted',
+  OUTLINE_REORDERED: 'outline:reordered',
+  OUTLINE_GENERATED: 'outline:generated',
+  OUTLINE_NEEDS_REFRESH: 'outline:needsRefresh',
+
+  // 章节相关事件
+  CHAPTER_CREATED: 'chapter:created',
+  CHAPTER_UPDATED: 'chapter:updated',
+  CHAPTER_DELETED: 'chapter:deleted',
+  CHAPTER_NEEDS_REFRESH: 'chapter:needsRefresh',
+} as const;