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/@babel/helper-compilation-targets/LICENSE

@@ -0,0 +1,22 @@
+MIT License
+
+Copyright (c) 2014-present Sebastian McKenzie and other contributors
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

node-network-app/node_modules/@babel/helper-compilation-targets/README.md

@@ -0,0 +1,19 @@
+# @babel/helper-compilation-targets
+
+> Helper functions on Babel compilation targets
+
+See our website [@babel/helper-compilation-targets](https://babeljs.io/docs/babel-helper-compilation-targets) for more information.
+
+## Install
+
+Using npm:
+
+```sh
+npm install --save @babel/helper-compilation-targets
+```
+
+or using yarn:
+
+```sh
+yarn add @babel/helper-compilation-targets
+```

node-network-app/node_modules/@babel/helper-compilation-targets/package.json

@@ -0,0 +1,43 @@
+{
+  "name": "@babel/helper-compilation-targets",
+  "version": "7.27.2",
+  "author": "The Babel Team (https://babel.dev/team)",
+  "license": "MIT",
+  "description": "Helper functions on Babel compilation targets",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/babel/babel.git",
+    "directory": "packages/babel-helper-compilation-targets"
+  },
+  "main": "./lib/index.js",
+  "exports": {
+    ".": {
+      "types": "./lib/index.d.ts",
+      "default": "./lib/index.js"
+    },
+    "./package.json": "./package.json"
+  },
+  "publishConfig": {
+    "access": "public"
+  },
+  "keywords": [
+    "babel",
+    "babel-plugin"
+  ],
+  "dependencies": {
+    "@babel/compat-data": "^7.27.2",
+    "@babel/helper-validator-option": "^7.27.1",
+    "browserslist": "^4.24.0",
+    "lru-cache": "^5.1.1",
+    "semver": "^6.3.1"
+  },
+  "devDependencies": {
+    "@babel/helper-plugin-test-runner": "^7.27.1",
+    "@types/lru-cache": "^5.1.1",
+    "@types/semver": "^5.5.0"
+  },
+  "engines": {
+    "node": ">=6.9.0"
+  },
+  "type": "commonjs"
+}