Remove background image fix entry from changelog

Author: 77-223255

CHANGELOG.md

@@ -7,8 +7,6 @@
 - **Redesigned** settings popup: removed language toggle, replaced text with eye emoticons (`O_O`/`>_<`), removed box borders with divider lines ([popup.html](./popup.html), [popup.js](./popup.js))
 - **Refreshed** brand colors: more saturated blue/green for selection and active states ([overlay.css](./overlay.css#L6-L11))
 - **Increased** tab item heights: default 40→60px, expanded 120→150px ([popup.html](./popup.html#L50-L67))
-- **Fixed** background image path (`.jpg`→`.png`) and `inset: -1px` to hide border line under thumbnails ([popup.html](./popup.html#L28-L37))
-
 ## v1.1.2 (2026-04-30)
 
 - **Fixed** preview layout jitter when switching between tabs with different thumbnail sizes.

CHANGELOG.zh-CN.md

@@ -7,8 +7,6 @@
 - **重构** 设置弹窗：移除语言切换，文字替换为眼睛颜文字（`O_O`/`>_<`），取消边框改用分割线 ([popup.html](./popup.html), [popup.js](./popup.js))
 - **焕新** 品牌色：选中态和激活态使用更高饱和度的蓝/绿色 ([overlay.css](./overlay.css#L6-L11))
 - **调整** 标签项高度：默认 40→60px，展开 120→150px ([popup.html](./popup.html#L50-L67))
-- **修复** 背景图路径（`.jpg`→`.png`），`inset: -1px` 修复缩略图下边框线露白 ([popup.html](./popup.html#L28-L37))
-
 ## v1.1.2 (2026-04-30)
 
 - **修复** 切换不同缩略图尺寸标签页时的预览布局跳动问题