feat: 添加底部按钮动画效果并优化代码

- 为底部按钮添加显示/隐藏的过渡动画效果
- 移除vconsole调试工具相关代码
- 优化图片上传相关代码结构
- 修复底部按钮状态控制逻辑

css/index.css

@@ -223,6 +223,7 @@ editor {
 }
 .container .anonymity {
   margin-left: 0.4rem;
+  width: fit-content;
 }
 .container .anonymity .icon {
   width: 0.32rem;
@@ -250,6 +251,10 @@ editor {
   padding: 0.34rem 0.3rem 0;
   box-sizing: border-box;
   display: flex;
+  transition: all 0.3s ease-in-out;
+}
+.container .new-footer-btn.show {
+  bottom: -2.4rem;
 }
 .container .new-footer-btn .save-draft-btn {
   flex-direction: column;