refactor code and add dragover visual cue

Signed-off-by: Gunwant Jain <mail@wantguns.dev>

src/routes/static_files.rs

@@ -1,7 +1,10 @@
-use std::path::{Path, PathBuf};
 use rocket::fs::NamedFile;
+use rocket::response::status::NotFound;
+use std::path::{Path, PathBuf};
 
 #[get("/<file..>", rank = 3)]
-pub async fn static_files(file: PathBuf) -> Option<NamedFile> {
-    NamedFile::open(Path::new("static/").join(file)).await.ok()
+pub async fn static_files(file: PathBuf) -> Result<NamedFile, NotFound<String>> {
+    NamedFile::open(Path::new("static/").join(file))
+        .await
+        .map_err(|e| NotFound(e.to_string()))
 }