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/node-gyp-build/build-test.js

@@ -0,0 +1,19 @@
+#!/usr/bin/env node
+
+process.env.NODE_ENV = 'test'
+
+var path = require('path')
+var test = null
+
+try {
+  var pkg = require(path.join(process.cwd(), 'package.json'))
+  if (pkg.name && process.env[pkg.name.toUpperCase().replace(/-/g, '_')]) {
+    process.exit(0)
+  }
+  test = pkg.prebuild.test
+} catch (err) {
+  //  do nothing
+}
+
+if (test) require(path.join(process.cwd(), test))
+else require('./')()