feat(web): add /health endpoints to all web apps

Add health check endpoints for Docker container monitoring:
- calendar-web
- clock-web
- contacts-web
- manacore-web
- manadeck-web
- nutriphi-web
- picture-web
- presi-web
- storage-web
- zitare-web

Also update todo-web docker-compose health check to use /health

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docker-compose.macmini.yml

@@ -226,7 +226,7 @@ services:
     ports:
       - "5188:5188"
     healthcheck:
-      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://127.0.0.1:5188/"]
+      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://127.0.0.1:5188/health"]
       interval: 30s
       timeout: 10s
       retries: 3