Marketing Hub: RBAC, i18n (AR/EN), tasks overhaul, team/user merge, tutorial

Features:
- Full RBAC with 3 roles (superadmin/manager/contributor)
- Ownership tracking on posts, tasks, campaigns, projects
- Task system: assign to anyone, filter combobox, visibility scoping
- Team members merged into users table (single source of truth)
- Post thumbnails on kanban cards from attachments
- Publication link validation before publishing
- Interactive onboarding tutorial with Settings restart
- Full Arabic/English i18n with RTL layout support
- Language toggle in sidebar, IBM Plex Sans Arabic font
- Brand-based visibility filtering for non-superadmins
- Manager can only create contributors
- Profile completion flow for new users
- Cookie-based sessions (express-session + SQLite)

server/node_modules/decompress-response/index.d.ts

@@ -0,0 +1,22 @@
+/// <reference types="node"/>
+import {IncomingMessage} from 'http';
+
+/**
+Decompress a HTTP response if needed.
+
+@param response - The HTTP incoming stream with compressed data.
+@returns The decompressed HTTP response stream.
+
+@example
+```
+import {http} from 'http';
+import decompressResponse = require('decompress-response');
+
+http.get('https://sindresorhus.com', response => {
+	response = decompressResponse(response);
+});
+```
+*/
+declare function decompressResponse(response: IncomingMessage): IncomingMessage;
+
+export = decompressResponse;