[FEAT]: Add a Show Card back only button

[liweibiao]

Is your feature request related to a problem? Please describe.

After the card is flipped, sometimes the screen is not high enough to show both sides

Describe the solution you'd like

Add a Show Card back only button

Additional context

main.js
搜createCardControls

  // -> Controls
  _createCardControls() {
    this._createEditButton();
    this._createResetButton();
    this._createCardInfoButton();
	this.createShowBackButton();//添加按钮
    this._createSkipButton();
  }

搜View Card Info

  _createCardInfoButton() {
    this.infoButton = this.controls.createEl("button");
    this.infoButton.addClasses(["sr-button", "sr-info-button"]);
    (0, import_obsidian6.setIcon)(this.infoButton, "info");
    this.infoButton.setAttribute("aria-label", "View Card Info");
    this.infoButton.addEventListener("click", async () => {
      this._displayCurrentCardInfoNotice();
    });
  }
//添加以下代码，为按钮添加点击事件
  _createShowBackButton() {
    this.showBackButton = this.controls.createEl("button");
    this.showBackButton.addClasses(["sr-button", "sr-flip-button"]);
    (0, import_obsidian5.setIcon)(this.showBackButton, "eye");
    this.showBackButton.setAttribute("aria-label", "仅显示卡片背面");

    // 初始化状态为显示
    this.showBackButton.setAttribute("data-is-back-visible", "true");

    // 添加点击事件监听器
    this.showBackButton.addEventListener("click", async () => {
        // 获取当前状态
        const isBackVisible = this.showBackButton.getAttribute("data-is-back-visible") === "true";

        // 切换隐藏/显示 #sr-content 的第一个子元素 p
        const firstChildP = this.content.querySelector("p:first-child");
        if (firstChildP) {
            if (isBackVisible) {
                firstChildP.style.display = "none";
            } else {
                firstChildP.style.display = "block";
            }

            // 更新状态
            this.showBackButton.setAttribute("data-is-back-visible", isBackVisible ? "false" : "true");
            // 根据状态切换图标
            if (isBackVisible) {
                import_obsidian5.setIcon(this.showBackButton, "eye-off");
            } else {
                import_obsidian5.setIcon(this.showBackButton, "eye");
            }			
        }
    });
}  

搜_showAnswer

  _showAnswer() {
    const timeNow = (0, import_moment4.now)();
    if (this.lastPressed && timeNow - this.lastPressed < this.plugin.data.settings.reviewButtonDelay) {
      return;
    }
    this.lastPressed = timeNow;
    this.mode = 2 /* Back */;
    this.resetButton.disabled = false;
// ----------------注释问题答案之间的分隔线--------------
    //if (this._currentQuestion.questionType !== 4 /* Cloze */) {
      /*const hr = document.createElement("hr");
      hr.addClass("sr-card-divide");
      this.content.appendChild(hr);
    } else {
      this.content.empty();
    }*/
// ---------------- 检查按钮状态 ----------------
    const isBackVisible = this.showBackButton.getAttribute("data-is-back-visible") === "true";
    const firstChildP = this.sr-content.querySelector("p:first-child");
    if (firstChildP) {
        if (!isBackVisible) {
            firstChildP.style.display = "none";
        }
    }	
// -----------------------------------------
    wrapper.renderMarkdownWrapper(
      this._currentCard.back,
      this.content,
      this._currentQuestion.questionText.textDirection
    );