[fix] loading after completed lazy loading and restored visit

[yasu551]

Description

There is a problem with loading after lazy loading is completed and then visit restored. The frames that have completed lazy loading do not execute their loading processes. This problem occurs during visit restoration because the status information indicating that lazy loading has already been completed is not being fully restored. To reproduce this successfully, we need to set #hasBeenLoaded to true when connecting to the frame.

// src/core/frames/frame_controller.js

connect() {
  if (!this.#connected) {
    this.#connected = true
    if (this.loadingStyle == FrameLoadingStyle.lazy) {
      if (this.complete) {
        this.#hasBeenLoaded = true
      } else {
        this.appearanceObserver.start()
      }

Before this PR

After this PR

Relations

Closes #886

[yasu551]

@seanpdoyle could you review this PR?