feat: modal confirmation glassmorphism + crontabs nettoyage

Modal confirmation custom (assets/app.js) :
- Remplace le confirm() natif du navigateur par une modal glassmorphism
- Header glass-dark avec icône warning rouge + "Confirmation"
- Message dynamique depuis data-confirm du formulaire
- Boutons Annuler (glass) et Confirmer (rouge)
- Fermeture via overlay, bouton Annuler ou Escape
- Au clic Confirmer : supprime data-confirm et submit le formulaire

Crontab Docker (docker/cron/crontab) :
- 0 2 * * * app:clean:pending-delete (nettoyage clients pending_delete)
- 0 5 * * * app:email-tracking:purge (purge tracking > 90j)
- 0 6 * * * app:dns:check (vérification DNS)
- 0 4 * * 0 app:meilisearch:setup (reindex complet dimanche 4h)
- 0 7 * * * app:cloudflare:clean (nettoyage _acme-challenge)

Ansible deploy.yml.disabled :
- Ajout cron clean pending delete (daily 2h)
- Ajout cron meilisearch full reindex (weekly dimanche 4h)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ansible/deploy.yml.disabled

@@ -288,6 +288,23 @@
         job: "docker compose -f /var/www/crm-siteconseil/docker-compose-prod.yml exec -T php php bin/console app:cloudflare:clean --env=prod >> /var/log/crm-siteconseil-cloudflare-clean.log 2>&1"
         user: bot
 
+    - name: Configure pending delete cleanup cron (daily at 2am)
+      cron:
+        name: "crm-siteconseil clean pending delete"
+        minute: "0"
+        hour: "2"
+        job: "docker compose -f /var/www/crm-siteconseil/docker-compose-prod.yml exec -T php php bin/console app:clean:pending-delete --env=prod >> /var/log/crm-siteconseil-clean-pending.log 2>&1"
+        user: bot
+
+    - name: Configure Meilisearch full reindex cron (weekly Sunday at 4am)
+      cron:
+        name: "crm-siteconseil meilisearch reindex"
+        minute: "0"
+        hour: "4"
+        weekday: "0"
+        job: "docker compose -f /var/www/crm-siteconseil/docker-compose-prod.yml exec -T php php bin/console app:meilisearch:setup --env=prod >> /var/log/crm-siteconseil-meilisearch-reindex.log 2>&1"
+        user: bot
+
   post_tasks:
     - name: Disable maintenance mode
       command: make maintenance_off