功能修复

src/components/DirectorySidebar.vue

@@ -17,12 +17,14 @@ const props = withDefaults(
       currentFilePath?: string | null;
       isFullWidth?: boolean;
       displayMode?: "split" | "wysiwyg";
+      isMarkdownFile?: boolean;
     }>(),
     {
       content: "",
       currentFilePath: null,
       isFullWidth: false,
       displayMode: "split",
+      isMarkdownFile: false,
     },
 );
 
@@ -252,8 +254,8 @@ const showSettings = ref(false);
           </button>
         </div>
         <div class="px-4 py-6 space-y-5">
-          <!-- Display mode toggle -->
-          <div class="flex items-center justify-between">
+          <!-- Display mode toggle (only for .md files) -->
+          <div v-if="props.isMarkdownFile" class="flex items-center justify-between">
             <div class="flex-1 mr-3">
               <p class="text-sm text-[#38342e] font-medium">编辑模式</p>
               <p class="text-xs text-[#8c877d] mt-0.5 leading-relaxed">