Add ntfy push notifications with action buttons for meal reminders

- ntfy.py: send_meal_reminder() with Home/Out HTTP action buttons, test helper
- models.py: new columns ntfy_url, ntfy_token, callback_token on users table
- meals.py: /api/ntfy-callback (public, token-authenticated), /ntfy-settings, /ntfy-test
- app.py: flask send-reminders CLI command (cron-schedulable)
- Dashboard: ntfy config form in Account Settings
- i18n: translations for all ntfy strings (en/fr/de)
- Dockerfile: include ntfy.py in COPY
- tests: 15 new tests covering callback, settings, and auth
- docs: updated AGENTS.md and doc/index.md

app.py

@@ -1,13 +1,16 @@
 """Meal Tracker — Flask application entry point."""
 
 import os
+from datetime import date
 
+import click
 from flask import Flask
 
-from models import init_db
+from models import init_db, get_users_with_ntfy, get_all_households
 from auth import auth_bp
 from meals import meals_bp
 from i18n import init_i18n
+from ntfy import send_meal_reminder
 
 
 def create_app() -> Flask:
@@ -22,6 +25,39 @@ def create_app() -> Flask:
 
     init_i18n(app)
 
+    # ── CLI commands ──
+    @app.cli.command("send-reminders")
+    @click.option("--date", default=None, help="Date to send reminders for (YYYY-MM-DD, default: today)")
+    @click.option("--meal", default="both", type=click.Choice(["lunch", "dinner", "both"]),
+                  help="Which meal to send reminders for (default: both)")
+    @click.option("--base-url", default=None, help="Base URL of the app (default: $APP_BASE_URL or http://localhost:5000)")
+    def send_reminders_command(date, meal, base_url):
+        """Send ntfy meal reminders to all users who have ntfy configured."""
+        target_date = date and __import__("datetime").datetime.strptime(date, "%Y-%m-%d").date() or date.today()
+        app_base_url = base_url or os.environ.get("APP_BASE_URL", "http://localhost:5000")
+
+        meal_types = ["lunch", "dinner"] if meal == "both" else [meal]
+        total_sent = 0
+
+        for household in get_all_households():
+            for user in get_users_with_ntfy(household["id"]):
+                for mt in meal_types:
+                    ok = send_meal_reminder(
+                        ntfy_url=user["ntfy_url"],
+                        ntfy_token=user["ntfy_token"],
+                        callback_token=user["callback_token"],
+                        meal_type=mt,
+                        for_date=target_date,
+                        app_base_url=app_base_url,
+                    )
+                    if ok:
+                        total_sent += 1
+                        click.echo(f"  ✓ {user['username']} ({mt})")
+                    else:
+                        click.echo(f"  ✗ {user['username']} ({mt}) — failed")
+
+        click.echo(f"\nSent {total_sent} reminder(s) for {target_date.isoformat()}.")
+
     return app