fix: support raw HTML upload via FileReader, fix file import flow

crates/api/src/routes/tabs.rs

@@ -10,7 +10,8 @@ pub struct AppState {
 
 #[derive(Deserialize)]
 pub struct ParseRequest {
-    pub source: String,
+    pub source: Option<String>,
+    pub html: Option<String>,
 }
 
 #[derive(Serialize)]
@@ -22,17 +23,26 @@ pub async fn parse_tab(
     State(state): State<Arc<AppState>>,
     Json(body): Json<ParseRequest>,
 ) -> Result<Json<domain::Song>, (StatusCode, Json<ErrorResponse>)> {
-    let source = if body.source.starts_with("file://") {
-        let path = body.source.trim_start_matches("file://");
-        TabSource::File(PathBuf::from(path))
+    let html = if let Some(raw_html) = body.html {
+        // Raw HTML provided directly (e.g. from browser file upload via FileReader)
+        raw_html
+    } else if let Some(source) = body.source {
+        let tab_source = if source.starts_with("file://") {
+            let path = source.trim_start_matches("file://");
+            TabSource::File(PathBuf::from(path))
+        } else {
+            TabSource::Url(source)
+        };
+        state.fetcher.fetch(tab_source).await.map_err(|e| {
+            (StatusCode::BAD_GATEWAY, Json(ErrorResponse { error: e.to_string() }))
+        })?
     } else {
-        TabSource::Url(body.source)
+        return Err((
+            StatusCode::BAD_REQUEST,
+            Json(ErrorResponse { error: "Provide either 'source' or 'html'".into() }),
+        ));
     };
 
-    let html = state.fetcher.fetch(source).await.map_err(|e| {
-        (StatusCode::BAD_GATEWAY, Json(ErrorResponse { error: e.to_string() }))
-    })?;
-
     let song = state.parser.parse(&html).map_err(|e| {
         (StatusCode::UNPROCESSABLE_ENTITY, Json(ErrorResponse { error: e.to_string() }))
     })?;