fix(production): fix multiple remote server errors from nginx logs

- Fix 413 Request Entity Too Large: bump client_max_body_size to 256M,
  PHP post_max_size/upload_max_filesize to 256M, fastcgi timeouts to 300s
- Fix missing v_smtp_active view: add IF NOT EXISTS to all CREATE VIEW
  statements in schema.sql for idempotent migrates
- Fix bars.svg 404: create animated SVG spinner in app/public/assets/img/
- Fix nginx rate limiting: increase admin zone from 60r/m (1 r/s) to
  300r/m (5 r/s) with burst=30 to handle ~11 concurrent HTMX fragment
  GETs on contenus.php page load
- Add deploy-nginx recipe to justfile for uploading nginx config to server
- Database readonly issue mitigated by existing --chown + deploy-server.sh
  permissions fix
- Add comprehensive PHP/JS debugging logs for settings checkboxes:
  per-field raw POST values in error_log, console.log on htmx:beforeSend,
  htmx:sendError, htmx:afterRequest, toast lifecycle
- Fix toast auto-remove script: use getElementById with unique ID instead
  of querySelector which could remove wrong toast on rapid clicks

justfile

@@ -68,6 +68,8 @@ deploy:
     ssh xamxam "cd /var/www/xamxam && php -r 'if (!file_exists(\"/var/www/xamxam/storage/xamxam.db\")) { \$db = new PDO(\"sqlite:/var/www/xamxam/storage/xamxam.db\"); \$db->exec(file_get_contents(\"/var/www/xamxam/storage/schema.sql\")); echo \"Database created from schema.\\n\"; } else { echo \"Database already exists.\\n\"; }'"
     # Run pending migrations
     ssh xamxam "cd /var/www/xamxam && bash scripts/migrate.sh"
+    # Deploy nginx configuration
+    @just deploy-nginx
     # Sync .env separately (excluded above to avoid accidental overwrite on subsequent deploys)
     @just deploy-env
     @just deploy-verify-permissions
@@ -226,6 +228,17 @@ deploy-verify-permissions:
 		exit 1
 	fi
 
+[group('deploy')]
+deploy-nginx:
+    # Upload nginx config to the server, test it, and reload.
+    # Uses the scripts/deploy-server.sh helper that handles the nginx
+    # config installation and reload (steps 2-4).
+    @echo "📋 Deploying nginx configuration…"
+    rsync -v nginx/xamxam.conf xamxam:/tmp/xamxam.conf
+    rsync -v scripts/deploy-server.sh xamxam:/tmp/deploy-server.sh
+    ssh xamxam "sudo DEPLOY_USER=\$USER bash /tmp/deploy-server.sh"
+    ssh xamxam "rm -f /tmp/deploy-server.sh /tmp/xamxam.conf"
+
 [group('deploy')]
 deploy-script script_name:
     # Generic script deployer (e.g., just deploy-script setup-server)