feat: file logging on client, logs command to fetch last N lines

crates/server/src/api.rs

@@ -135,6 +135,29 @@ pub async fn window_screenshot(
     }
 }
 
+/// GET /sessions/:id/logs?lines=100
+pub async fn logs(
+    Path(session_id): Path<String>,
+    Query(params): Query<std::collections::HashMap<String, String>>,
+    State(state): State<AppState>,
+) -> impl IntoResponse {
+    let lines: u32 = params.get("lines").and_then(|v| v.parse().ok()).unwrap_or(100);
+    match dispatch(&state, &session_id, "logs", |rid| {
+        ServerMessage::LogsRequest { request_id: rid, lines }
+    }).await {
+        Ok(ClientMessage::LogsResponse { content, log_path, .. }) => (
+            StatusCode::OK,
+            Json(serde_json::json!({ "content": content, "log_path": log_path, "lines": lines })),
+        ).into_response(),
+        Ok(ClientMessage::Error { message, .. }) => (
+            StatusCode::INTERNAL_SERVER_ERROR,
+            Json(serde_json::json!({ "error": message })),
+        ).into_response(),
+        Ok(_) => (StatusCode::BAD_GATEWAY, Json(serde_json::json!({ "error": "Unexpected response" }))).into_response(),
+        Err(e) => e.into_response(),
+    }
+}
+
 /// POST /sessions/:id/screenshot
 pub async fn request_screenshot(
     Path(session_id): Path<String>,