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/bcrypt/promises.js

@@ -0,0 +1,45 @@
+let Promise = global.Promise;
+
+/// encapsulate a method with a node-style callback in a Promise
+/// @param {object} 'this' of the encapsulated function
+/// @param {function} function to be encapsulated
+/// @param {Array-like} args to be passed to the called function
+/// @return {Promise} a Promise encapsulating the function
+function promise(fn, context, args) {
+    if (!Array.isArray(args)) {
+        args = Array.prototype.slice.call(args);
+    }
+
+    if (typeof fn !== 'function') {
+        return Promise.reject(new Error('fn must be a function'));
+    }
+
+    return new Promise((resolve, reject) => {
+        args.push((err, data) => {
+            if (err) {
+                reject(err);
+            } else {
+                resolve(data);
+            }
+        });
+
+        fn.apply(context, args);
+    });
+}
+
+/// @param {err} the error to be thrown
+function reject(err) {
+    return Promise.reject(err);
+}
+
+/// changes the promise implementation that bcrypt uses
+/// @param {Promise} the implementation to use
+function use(promise) {
+    Promise = promise;
+}
+
+module.exports = {
+    promise,
+    reject,
+    use
+}