添加显示图片和视频功能

src-tauri/src/lib.rs

@@ -1,7 +1,7 @@
 // Learn more about Tauri commands at https://tauri.app/develop/calling-rust/
 use std::fs;
 use tauri::menu::{MenuBuilder, MenuItemBuilder, SubmenuBuilder};
-use tauri::Emitter;
+use tauri::{Emitter, Manager};
 use tauri_plugin_dialog::DialogExt;
 
 #[derive(Debug, Clone, serde::Serialize)]
@@ -43,8 +43,12 @@ fn pick_folder(app: tauri::AppHandle) -> Option<String> {
 }
 
 #[tauri::command]
-fn read_dir(path: String) -> Result<Vec<DirEntry>, String> {
+fn read_dir(app: tauri::AppHandle, path: String) -> Result<Vec<DirEntry>, String> {
     let entries = fs::read_dir(&path).map_err(|e| format!("无法读取目录: {}", e))?;
+    app.asset_protocol_scope()
+        .allow_directory(&path, true)
+        .map_err(|e| format!("无法授权媒体预览目录: {}", e))?;
+
     let allowed_extensions = [
         "md", "png", "jpg", "jpeg", "gif", "webp", "avif", "mp4", "webm", "mov", "m4v", "ogv",
     ];