fix: build loi E0308 - blocking_pick_folder tra Option<FilePath> khong phai PathBuf

tauri-plugin-dialog v2: blocking_pick_folder() -> Option<FilePath> (enum
Path(PathBuf) | Url(Url) — xac minh tu source plugins-workspace v2:
plugins/dialog/src/lib.rs:728 + plugins/fs/src/file_path.rs:20).
Match FilePath::Path -> to_string_lossy, FilePath::Url -> to_string.

src-tauri/src/lib.rs

@@ -11,7 +11,7 @@
 // Ngoài ra lib.rs còn dò THÊM các vị trí fallback (legacy/portable/dev)
 // và ghi đầy đủ diagnostic vào %APPDATA%/SonicForgeDAW/logs/spawn.log.
 use tauri::Manager;
-use tauri_plugin_dialog::DialogExt;
+use tauri_plugin_dialog::{DialogExt, FilePath};
 use tauri_plugin_shell::process::CommandChild;
 use tauri_plugin_shell::ShellExt;
 use std::path::{Path, PathBuf};
@@ -184,12 +184,17 @@ pub fn run() {
                         let handle = app_handle.clone();
                         let resp_for_main = resp.clone();
                         let _ = handle.run_on_main_thread(move || {
-                            let picked: Option<PathBuf> = handle
+                            // tauri-plugin-dialog v2: blocking_pick_folder() tra
+                            // Option<FilePath> (enum Path(PathBuf) | Url(Url))
+                            let picked: Option<FilePath> = handle
                                 .dialog()
                                 .file()
                                 .blocking_pick_folder();
                             let val = picked
-                                .map(|p| p.to_string_lossy().to_string())
+                                .map(|p| match p {
+                                    FilePath::Path(pb) => pb.to_string_lossy().to_string(),
+                                    FilePath::Url(u) => u.to_string(),
+                                })
                                 .unwrap_or_default();
                             let _ = std::fs::write(&resp_for_main, val);
                         });