fix(terminal): 缩放/高频输出冻结修复（reflow 节流 + 写入批量化），新增诊断日志（7 天滚动 + 开关），v1.0.26

src/shared/api.ts

@@ -30,6 +30,8 @@ import type { ZmodemDoneEvent, ZmodemOfferEvent, ZmodemResponse } from './ipc'
  */
 export interface AppApi {
   appInfo(): Promise<AppInfo>
+  /** append one line to the diagnostic app log (watchdog reports) */
+  appLog(line: string): void
 
   // ---- sessions (pty data plane is shared by local and ssh sessions) ----
   createPty(opts?: PtyCreateOptions): Promise<PtyCreateResult>