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/gyp/gyp_main.py

@@ -0,0 +1,45 @@
+#!/usr/bin/env python3
+
+# Copyright (c) 2009 Google Inc. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import os
+import sys
+import subprocess
+
+
+def IsCygwin():
+    # Function copied from pylib/gyp/common.py
+    try:
+        out = subprocess.Popen(
+            "uname", stdout=subprocess.PIPE, stderr=subprocess.STDOUT
+        )
+        stdout, _ = out.communicate()
+        return "CYGWIN" in stdout.decode("utf-8")
+    except Exception:
+        return False
+
+
+def UnixifyPath(path):
+    try:
+        if not IsCygwin():
+            return path
+        out = subprocess.Popen(
+            ["cygpath", "-u", path], stdout=subprocess.PIPE, stderr=subprocess.STDOUT
+        )
+        stdout, _ = out.communicate()
+        return stdout.decode("utf-8")
+    except Exception:
+        return path
+
+
+# Make sure we're using the version of pylib in this repo, not one installed
+# elsewhere on the system. Also convert to Unix style path on Cygwin systems,
+# else the 'gyp' library will not be found
+path = UnixifyPath(sys.argv[0])
+sys.path.insert(0, os.path.join(os.path.dirname(path), "pylib"))
+import gyp  # noqa: E402
+
+if __name__ == "__main__":
+    sys.exit(gyp.script_main())