fix: 搜索/替换面板移至编辑器顶部

导入 search 函数并添加 search({ top: true }) 配置，使搜索面板显示在编辑器顶部而非底部

src/renderer/components/Editor/useCodeMirror.ts

@@ -4,7 +4,7 @@ import { EditorView, keymap, lineNumbers, highlightActiveLine, highlightSpecialC
 import { defaultKeymap, history, historyKeymap, indentWithTab } from '@codemirror/commands'
 import { markdown, markdownLanguage } from '@codemirror/lang-markdown'
 import { syntaxHighlighting, defaultHighlightStyle, indentOnInput, bracketMatching, foldGutter } from '@codemirror/language'
-import { searchKeymap, highlightSelectionMatches } from '@codemirror/search'
+import { search, searchKeymap, highlightSelectionMatches } from '@codemirror/search'
 import { oneDark } from '@codemirror/theme-one-dark'
 
 interface UseCodeMirrorOptions {
@@ -40,6 +40,7 @@ export function useCodeMirror({ content, onChange, darkMode, onScroll }: UseCode
 
     const extensions: Extension[] = [
       zhPhrases,
+      search({ top: true }),
       lineNumbers(),
       highlightActiveLine(),
       highlightSpecialChars(),