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/gauge/lib/themes.js

@@ -0,0 +1,56 @@
+'use strict'
+var color = require('console-control-strings').color
+var ThemeSet = require('./theme-set.js')
+
+var themes = module.exports = new ThemeSet()
+
+themes.addTheme('ASCII', {
+  preProgressbar: '[',
+  postProgressbar: ']',
+  progressbarTheme: {
+    complete: '#',
+    remaining: '.',
+  },
+  activityIndicatorTheme: '-\\|/',
+  preSubsection: '>',
+})
+
+themes.addTheme('colorASCII', themes.getTheme('ASCII'), {
+  progressbarTheme: {
+    preComplete: color('bgBrightWhite', 'brightWhite'),
+    complete: '#',
+    postComplete: color('reset'),
+    preRemaining: color('bgBrightBlack', 'brightBlack'),
+    remaining: '.',
+    postRemaining: color('reset'),
+  },
+})
+
+themes.addTheme('brailleSpinner', {
+  preProgressbar: '(',
+  postProgressbar: ')',
+  progressbarTheme: {
+    complete: '#',
+    remaining: '⠂',
+  },
+  activityIndicatorTheme: '⠋⠙⠹⠸⠼⠴⠦⠧⠇⠏',
+  preSubsection: '>',
+})
+
+themes.addTheme('colorBrailleSpinner', themes.getTheme('brailleSpinner'), {
+  progressbarTheme: {
+    preComplete: color('bgBrightWhite', 'brightWhite'),
+    complete: '#',
+    postComplete: color('reset'),
+    preRemaining: color('bgBrightBlack', 'brightBlack'),
+    remaining: '⠂',
+    postRemaining: color('reset'),
+  },
+})
+
+themes.setDefault({}, 'ASCII')
+themes.setDefault({ hasColor: true }, 'colorASCII')
+themes.setDefault({ platform: 'darwin', hasUnicode: true }, 'brailleSpinner')
+themes.setDefault({ platform: 'darwin', hasUnicode: true, hasColor: true }, 'colorBrailleSpinner')
+themes.setDefault({ platform: 'linux', hasUnicode: true }, 'brailleSpinner')
+themes.setDefault({ platform: 'linux', hasUnicode: true, hasColor: true }, 'colorBrailleSpinner')