docs: remove stale cronjob scheduling section, update to meal-cron container

AGENTS.md

@@ -35,7 +35,7 @@ Flask web app for tracking household meal attendance. Users register into househ
 - **i18n:** Every user-visible string in templates uses `{{ t('English text') }}`. In Python, `flash(t("message"), "category")`. Translations live in `TRANSLATIONS` dict in `i18n.py`. English string is the key; only non-English translations stored. When adding new user-facing text, add it to `TRANSLATIONS` for fr/de.
 - **DB:** All access through `get_db()` context manager in `models.py`. Returns `sqlite3.Row` objects accessed as dicts. Path via `DB_PATH` env var (defaults to `/data/meals.db` in Docker, `./meals.db` locally).
 - **CSS:** No framework. Variables in `:root`. Use existing utility classes (`.btn`, `.chip`, `.badge`, etc.).
-- **Ntfy:** Per-user topic URL + Bearer token stored in `users` table. Callback token auto-generated on first ntfy setup. `/api/ntfy-callback` is unauthenticated (uses callback token). Send reminders via `flask send-reminders [--date] [--meal] [--base-url]`. Schedule with cron.
+- **Ntfy:** Per-user topic URL + Bearer token stored in `users` table. Callback token auto-generated on first ntfy setup. `/api/ntfy-callback` is unauthenticated (uses callback token). Reminders are sent automatically by the `meal-cron` container calling `POST /api/cron-tick`.
 
 ## Common Pitfalls
 

doc/index.md

@@ -220,25 +220,9 @@ Users can configure [ntfy](https://ntfy.sh) to receive push notifications with a
 
 ### How It Works
 
-- Reminders are sent via the CLI command: `flask send-reminders`
+- Reminders are sent automatically by the `meal-cron` container via `POST /api/cron-tick` every 60 seconds
 - The notification contains **Home** and **Out** buttons
 - Pressing a button sends an HTTP callback to the app, recording your response instantly
 - Tapping the notification itself opens the dashboard
 
-### Scheduling Reminders
 
-Add a cron job on the server to send reminders automatically:
-
-```bash
-# Lunch reminder at 9:00 AM
-0 9 * * * cd /path/to/app && docker compose exec meal-tracker flask send-reminders --meal lunch --base-url https://meals.ct.cozytren.ch
-
-# Dinner reminder at 5:00 PM
-0 17 * * * cd /path/to/app && docker compose exec meal-tracker flask send-reminders --meal dinner --base-url https://meals.ct.cozytren.ch
-```
-
-Or run manually:
-
-```bash
-docker compose exec meal-tracker flask send-reminders --date 2026-08-01 --meal both
-```