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/prebuild-install/asset.js

@@ -0,0 +1,44 @@
+const get = require('simple-get')
+const util = require('./util')
+const proxy = require('./proxy')
+
+function findAssetId (opts, cb) {
+  const downloadUrl = util.getDownloadUrl(opts)
+  const apiUrl = util.getApiUrl(opts)
+  const log = opts.log || util.noopLogger
+
+  log.http('request', 'GET ' + apiUrl)
+  const reqOpts = proxy({
+    url: apiUrl,
+    json: true,
+    headers: {
+      'User-Agent': 'simple-get',
+      Authorization: 'token ' + opts.token
+    }
+  }, opts)
+
+  const req = get.concat(reqOpts, function (err, res, data) {
+    if (err) return cb(err)
+    log.http(res.statusCode, apiUrl)
+    if (res.statusCode !== 200) return cb(err)
+
+    // Find asset id in release
+    for (const release of data) {
+      if (release.tag_name === opts['tag-prefix'] + opts.pkg.version) {
+        for (const asset of release.assets) {
+          if (asset.browser_download_url === downloadUrl) {
+            return cb(null, asset.id)
+          }
+        }
+      }
+    }
+
+    cb(new Error('Could not find GitHub release for version'))
+  })
+
+  req.setTimeout(30 * 1000, function () {
+    req.abort()
+  })
+}
+
+module.exports = findAssetId