feat: add internal notification endpoint for rTorrent event hooks

backend/src/handlers/notifications.rs

@@ -0,0 +1,44 @@
+use axum::{
+    extract::{State, Query},
+    http::StatusCode,
+};
+use serde::Deserialize;
+use shared::{AppEvent, SystemNotification, NotificationLevel};
+use crate::AppState;
+
+#[derive(Deserialize)]
+pub struct TorrentFinishedQuery {
+    pub name: String,
+    pub hash: String,
+}
+
+pub async fn torrent_finished_handler(
+    State(state): State<AppState>,
+    Query(params): Query<TorrentFinishedQuery>,
+) -> StatusCode {
+    tracing::info!("Torrent finished notification received: {} ({})", params.name, params.hash);
+
+    let message = format!("Torrent tamamlandı: {}", params.name);
+
+    // 1. Send to active SSE clients (for Toast)
+    let notification = SystemNotification {
+        level: NotificationLevel::Success,
+        message: message.clone(),
+    };
+    let _ = state.event_bus.send(AppEvent::Notification(notification));
+
+    // 2. Send Web Push Notification (for Background)
+    #[cfg(feature = "push-notifications")]
+    {
+        let push_store = state.push_store.clone();
+        let title = "Torrent Tamamlandı".to_string();
+        let body = message;
+        tokio::spawn(async move {
+            if let Err(e) = crate::push::send_push_notification(&push_store, &title, &body).await {
+                tracing::error!("Failed to send push notification from webhook: {}", e);
+            }
+        });
+    }
+
+    StatusCode::OK
+}