User/Usergroup Pages first draft

backend/users/index.js

@@ -0,0 +1,44 @@
+import { db } from '../db/index.js';
+
+const selectUsersWithGroups = db.prepare(`
+  SELECT
+    u.id,
+    u.username,
+    u.email,
+    u.is_active,
+    u.last_login,
+    u.created_at,
+    u.updated_at,
+    GROUP_CONCAT(g.name, '|||') AS group_names
+  FROM users u
+  LEFT JOIN user_group_memberships m ON m.user_id = u.id
+  LEFT JOIN user_groups g ON g.id = m.group_id
+  GROUP BY u.id
+  ORDER BY u.username COLLATE NOCASE
+`);
+
+const normalizeGroupNames = (rawNames) => {
+  if (!rawNames) {
+    return [];
+  }
+  return rawNames
+    .split('|||')
+    .map((name) => String(name || '').trim())
+    .filter(Boolean);
+};
+
+const sanitizeUserRecord = (row) => ({
+  id: row.id,
+  username: row.username,
+  email: row.email,
+  isActive: Boolean(row.is_active),
+  lastLogin: row.last_login || null,
+  createdAt: row.created_at || null,
+  updatedAt: row.updated_at || null,
+  groups: normalizeGroupNames(row.group_names)
+});
+
+export function listUsers() {
+  const rows = selectUsersWithGroups.all();
+  return rows.map(sanitizeUserRecord);
+}