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_modules/fast-glob/out/utils/path.d.ts

@@ -0,0 +1,13 @@
+import { Pattern } from '../types';
+/**
+ * Designed to work only with simple paths: `dir\\file`.
+ */
+export declare function unixify(filepath: string): string;
+export declare function makeAbsolute(cwd: string, filepath: string): string;
+export declare function removeLeadingDotSegment(entry: string): string;
+export declare const escape: typeof escapeWindowsPath;
+export declare function escapeWindowsPath(pattern: Pattern): Pattern;
+export declare function escapePosixPath(pattern: Pattern): Pattern;
+export declare const convertPathToPattern: typeof convertWindowsPathToPattern;
+export declare function convertWindowsPathToPattern(filepath: string): Pattern;
+export declare function convertPosixPathToPattern(filepath: string): Pattern;