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/humanize-ms/History.md

@@ -0,0 +1,25 @@
+
+1.2.1 / 2017-05-19
+==================
+
+  * fix: package.json to reduce vulnerabilities (#3)
+
+1.2.0 / 2016-05-21
+==================
+
+  * feat: warn with stack
+
+1.1.0 / 2016-04-04
+==================
+
+  * deps: upgrade ms to 0.7.0
+
+1.0.1 / 2014-12-31
+==================
+
+  * feat(index.js): warn when result is undefined
+
+1.0.0 / 2014-08-14
+==================
+
+  * init