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/.bin/color-support

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+../color-support/bin.js

server/node_modules/.bin/mime

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+../mime/cli.js

server/node_modules/.bin/mkdirp

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+../mkdirp/bin/cmd.js

server/node_modules/.bin/node-gyp

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+../node-gyp/bin/node-gyp.js

server/node_modules/.bin/node-gyp-build

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+../node-gyp-build/bin.js

server/node_modules/.bin/node-gyp-build-optional

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+../node-gyp-build/optional.js

server/node_modules/.bin/node-gyp-build-test

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

server/node_modules/.bin/node-which

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+../which/bin/node-which

server/node_modules/.bin/nopt

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+../nopt/bin/nopt.js

server/node_modules/.bin/prebuild-install

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+../prebuild-install/bin.js

server/node_modules/.bin/rc

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+../rc/cli.js

server/node_modules/.bin/rimraf

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+../rimraf/bin.js

server/node_modules/.bin/semver

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+../semver/bin/semver.js