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/ip-address/dist/v6/regular-expressions.d.ts

@@ -0,0 +1,6 @@
+export declare function groupPossibilities(possibilities: string[]): string;
+export declare function padGroup(group: string): string;
+export declare const ADDRESS_BOUNDARY = "[^A-Fa-f0-9:]";
+export declare function simpleRegularExpression(groups: string[]): string;
+export declare function possibleElisions(elidedGroups: number, moreLeft?: boolean, moreRight?: boolean): string;
+//# sourceMappingURL=regular-expressions.d.ts.map