fix: added Cursor OAuth provider and fixed authentication flow race conditions

- Added Cursor OAuth provider support to CLI authentication flow.
- Fixed race conditions in OAuth callback handling and session picker cleanup.
- Improved JWT token parsing and error handling across OAuth providers.
- Replaced Bun.sleep() with abortable sleep for proper cancellation support.
- Enhanced process execution with concurrent stream reading and better timeout handling.
- Added cache cleanup mechanism for auth storage with 5-minute intervals.

packages/coding-agent/src/cli/session-picker.ts

@@ -28,8 +28,11 @@ export async function selectSession(sessions: SessionInfo[]): Promise<string | n
 			}
 		},
 		() => {
-			ui.stop();
-			process.exit(0);
+			if (!resolved) {
+				resolved = true;
+				ui.stop();
+				process.exit(0);
+			}
 		},
 	);