diff --git a/libs/biome.json b/libs/biome.json
index 5aae8c2..b0257bd 100644
--- a/libs/biome.json
+++ b/libs/biome.json
@@ -1,5 +1,5 @@
 {
-  "$schema": "https://biomejs.dev/schemas/2.5.1/schema.json",
+  "$schema": "https://biomejs.dev/schemas/2.5.3/schema.json",
   "vcs": {
     "enabled": false
   },
diff --git a/libs/tiptap-editor/src/code-block-view.ts b/libs/tiptap-editor/src/code-block-view.ts
index abfbc2d..60057ae 100644
--- a/libs/tiptap-editor/src/code-block-view.ts
+++ b/libs/tiptap-editor/src/code-block-view.ts
@@ -154,7 +154,7 @@ export class CodeBlockNodeView {
     if (mutation.target === this.contentDOM && mutation.type === 'attributes') return true;
     // contentDOM 内的 mutation（characterData/childList）：交给 ProseMirror（编辑核心）
     // 注意 contains 对 target===contentDOM 自身也返回 true，故上面的 attributes 判断须在前。
-    if (this.contentDOM && this.contentDOM.contains(mutation.target)) return false;
+    if (this.contentDOM?.contains(mutation.target)) return false;
     // 工具栏/结果区等装饰元素的 mutation：忽略
     return true;
   }
diff --git a/libs/yggdrasil-core/src/style.css b/libs/yggdrasil-core/src/style.css
index 9117ea9..6557b92 100644
--- a/libs/yggdrasil-core/src/style.css
+++ b/libs/yggdrasil-core/src/style.css
@@ -53,5 +53,6 @@ html.is-theme-transitioning *::after {
 html.is-theme-transitioning .animate-page-enter {
   /* !important 必需:animation-fill-mode: both 保留的关键帧值优先级高于普通
      规则,只有 !important 能覆盖,确保 VT 期间 transform 被清为 none。 */
+  /* biome-ignore lint/complexity/noImportantStyles: animation-fill-mode: both 保留非 none transform 创建堆叠上下文,仅 !important 可覆盖(详见上方注释) */
   transform: none !important;
 }