fix: add PageRegistry.clear() and getAll(), fix BrowserManager.cleanup() to clear registry

packages/daemon/src/browser-manager.ts

@@ -90,10 +90,10 @@ export class BrowserManager {
 
   async cleanup(): Promise<void> {
     // Close all contexts / 关闭所有上下文
-    const entries = this.registry['pages']?.values() ?? [];
-    for (const entry of entries) {
+    for (const entry of this.registry.getAll()) {
       try { await entry.context.close(); } catch { /* ignore / 忽略 */ }
     }
+    this.registry.clear();
     if (this.browser) {
       await this.browser.close();
       this.browser = null;

packages/daemon/src/page-registry.ts

@@ -45,4 +45,15 @@ export class PageRegistry {
   hasAlias(alias: string): boolean {
     return this.aliasMap.has(alias);
   }
+
+  /** Return all registered entries for iteration / 返回所有已注册条目用于遍历 */
+  getAll(): RegisteredPage[] {
+    return Array.from(this.pages.values());
+  }
+
+  /** Clear all entries / 清除所有条目 */
+  clear(): void {
+    this.pages.clear();
+    this.aliasMap.clear();
+  }
 }