Rollen-basiertes Zugriffsystem (public/user/admin), Registrierung mit
E-Mail-Verifikation, bcrypt Passwort-Hashing, Admin-Benutzerverwaltung.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Redesign dashboard and scheduler with AdminLTE-inspired layout: fixed sidebar
navigation, top navbar, info-boxes, card-outline styling, table-striped.
Fix channel names missing on initial load by sending channels before messages.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add message sending from web dashboard with channel selector, new POST /api/send
endpoint, scheduler support for free-text messages (type field), and modernized
dashboard layout with glassmorphism navbar, gradient stat cards, chat bubbles.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>