feat(app): event_log and mark_read bridge commands

app/src-tauri/src/bridge.rs

@@ -298,3 +298,16 @@ pub async fn delete_group(state: BridgeState<'_>, group_id: String) -> Result<Va
 pub async fn focus(state: BridgeState<'_>, surface_id: String) -> Result<Value, String> {
     data_of(state.request(Cmd::Focus { surface_id: SurfaceId(surface_id) }).await.map_err(|e| e.to_string())?)
 }
+
+// ---- M3 event log commands ----
+
+#[tauri::command]
+pub async fn event_log(state: BridgeState<'_>, limit: Option<u32>) -> Result<Value, String> {
+    data_of(state.request(Cmd::EventLog { limit }).await.map_err(|e| e.to_string())?)
+}
+
+#[tauri::command]
+pub async fn mark_read(state: BridgeState<'_>, target: Value) -> Result<Value, String> {
+    let target: spacesh_proto::MarkReadTarget = serde_json::from_value(target).map_err(|e| format!("invalid mark_read target: {e}"))?;
+    data_of(state.request(Cmd::MarkRead { target }).await.map_err(|e| e.to_string())?)
+}