feat: 侧边面板重构为通用 TabPanel，页签栏对齐 ZCode 交互

apps/desktop/src/main/browser/browser-controller.ts

@@ -126,6 +126,8 @@ export class BrowserController {
   private listeners = new Set<(state: BrowserUiState) => void>()
   private traceText: string | null = null
   private settings: BrowserSettings = { riskAcknowledged: false }
+  /** 最近关闭的页签（新的在前，供「最近关闭的标签页」恢复） */
+  private closedTabs: Array<{ title: string; url: string; closedAt: number }> = []
 
   constructor() {
     this.browserSession = electronSession.fromPartition(PARTITION)
@@ -232,6 +234,7 @@ export class BrowserController {
       riskAcknowledged: this.settings.riskAcknowledged,
       tabs,
       activeTabId: this.activeTabId,
+      recentClosed: this.closedTabs.map(({ title, url }) => ({ title, url })),
       trace: this.traceText,
       imported: this.settings.imported ?? null
     }
@@ -439,6 +442,9 @@ export class BrowserController {
     }
     this.removeView(tab.view)
     this.tabs.delete(id)
+    // 记入「最近关闭的标签页」（新的在前，最多 10 条）
+    this.closedTabs.unshift({ title: tab.title || tab.url || '新标签页', url: tab.url, closedAt: Date.now() })
+    this.closedTabs = this.closedTabs.slice(0, 10)
     if (this.activeTabId === id) this.activeTabId = this.tabs.keys().next().value ?? null
     if (this.agentTabId === id) this.agentTabId = this.activeTabId
     this.emitState()