feat: Add presence heartbeat for Matrix online status

- matrix-gateway: POST /internal/matrix/presence/online endpoint
- usePresenceHeartbeat hook with activity tracking
- Auto away after 5 min inactivity
- Offline on page close/visibility change
- Integrated in MatrixChatRoom component

node-network-app/node_modules/fast-glob/out/utils/index.d.ts

@@ -0,0 +1,8 @@
+import * as array from './array';
+import * as errno from './errno';
+import * as fs from './fs';
+import * as path from './path';
+import * as pattern from './pattern';
+import * as stream from './stream';
+import * as string from './string';
+export { array, errno, fs, path, pattern, stream, string };